Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph

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Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
CALGARY INT'L A

Symbol	Description
	Daily Maximum Temperature (°C)
	Daily Average Temperature (°C)
	Daily Minimum Temperature (°C)
	Precipitation (mm)

Normals Data

The minimum number of years used to calculate these Normals is indicated by a code for each element. A "+" beside an extreme date indicates that this date is the first occurrence of the extreme value. Values and dates in bold indicate all-time extremes for the location.

Data used in the calculation of these Normals may be subject to further quality assurance checks. This may result in minor changes to some values presented here.

CALGARY INT'L A *
ALBERTA

51°06'50.000" N

114°01'13.000" W

1,084.10 m

3031093

71877

YYC

* This station meets WMO standards for temperature and precipitation.

Temperature

1981 to 2010 Canadian Climate Normals station data
Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Daily Average (°C)	-7.1	-5.4	-1.6	4.6	9.7	13.7	16.5	15.8	11.0	5.2	-2.4	-6.8	4.4	A
Standard Deviation	4.5	3.6	3.5	1.7	1.6	1.1	1.4	1.5	2.0	1.8	3.6	4.4	1.0	A
Daily Maximum (°C)	-0.9	0.7	4.4	11.2	16.3	19.8	23.2	22.8	17.8	11.7	3.4	-0.8	10.8	A
Daily Minimum (°C)	-13.2	-11.4	-7.5	-2.0	3.1	7.5	9.8	8.8	4.1	-1.4	-8.2	-12.8	-1.9	A
Extreme Maximum (°C)	17.6	22.6	25.4	29.4	32.4	35.0	36.1	35.6	33.3	29.4	22.8	19.5
Date (yyyy/dd)	2003/ 07	1992/ 27	2004/ 30	1926/ 29	1986/ 30	1926/ 26	1919/ 15+	1914/ 03	1967/ 01	1889/ 05+	1975/ 04	1999/ 27
Extreme Minimum (°C)	-44.4	-45.0	-37.2	-30.0	-16.7	-3.3	-0.6	-3.2	-13.3	-25.7	-35.0	-42.8
Date (yyyy/dd)	1893/ 31	1893/ 04	1951/ 08+	1954/ 02	1954/ 01	1891/ 08+	1884/ 05	1992/ 25	1926/ 24	1984/ 31	1893/ 30	1924/ 17

Precipitation

1981 to 2010 Canadian Climate Normals station data
Precipitation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Rainfall (mm)	0.1	0.1	2.2	10.8	46.1	93.9	65.5	57.0	41.7	7.5	1.5	0.3	326.4	A
Snowfall (cm)	15.3	14.5	22.7	18.8	11.9	0.1	0.0	0.0	3.9	10.0	16.6	15.0	128.8	A
Precipitation (mm)	9.4	9.4	17.8	25.2	56.8	94.0	65.5	57.0	45.1	15.3	13.1	10.2	418.8	A
Average Snow Depth (cm)	4	3	3	1	0	0	0	0	0	0	2	4	1	A
Median Snow Depth (cm)	3	2	2	0	0	0	0	0	0	0	1	3	1	A
Snow Depth at Month-end (cm)	3	3	1	0	0	0	0	0	0	1	3	5	1	A
Extreme Daily Rainfall (mm)	7.6	6.4	23.4	37.1	65.0	79.2	95.3	80.8	92.6	45.7	9.2	6.4
Date (yyyy/dd)	1902/ 07	1885/ 26	1910/ 23	1912/ 30	1902/ 18	1932/ 01	1927/ 15	1945/ 25	1985/ 12	1915/ 01	1992/ 27	1885/ 03
Extreme Daily Snowfall (cm)	25.4	27.7	24.1	45.7	48.4	24.9	0.3	6.1	22.9	29.7	35.6	21.8
Date (yyyy/dd)	1913/ 03	1951/ 10	1889/ 13	1932/ 21	1981/ 06	1951/ 06	1918/ 23	1900/ 25	1895/ 19	1914/ 04	1914/ 13	1889/ 11
Extreme Daily Precipitation (mm)	25.4	27.7	25.0	45.7	65.0	79.2	95.3	80.8	92.6	45.7	35.6	21.8
Date (yyyy/dd)	1913/ 03	1951/ 10	1998/ 16	1932/ 21	1902/ 18	1932/ 01	1927/ 15	1945/ 25	1985/ 12	1915/ 01	1914/ 13	1889/ 11
Extreme Snow Depth (cm)	36	37	38	33	22	0	0	0	10	23	25	30
Date (yyyy/dd)	1997/ 10+	1978/ 13+	1998/ 18	1966/ 27	2002/ 07	1955/ 01+	1955/ 01+	1955/ 01+	1965/ 26+	1957/ 22	1965/ 15+	1996/ 30+

Days with Maximum Temperature

1981 to 2010 Canadian Climate Normals station data
Days with Maximum Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
<= 0 °C	13.4	11.1	8.3	2.0	0.17	0.0	0.0	0.0	0.0	2.0	8.4	13.9	59.3	A
> 0 °C	17.6	17.1	22.7	28.0	30.8	30.0	31.0	31.0	30.0	29.0	21.6	17.1	305.9	A
> 10 °C	2.7	4.0	8.3	18.0	26.5	29.4	31.0	30.5	26.0	19.2	5.7	2.4	203.7	A
> 20 °C	0.0	0.03	0.13	2.5	9.0	14.5	23.8	22.0	11.6	3.4	0.10	0.0	87.2	A
> 30 °C	0.0	0.0	0.0	0.0	0.14	0.27	2.1	2.1	0.50	0.0	0.0	0.0	5.1	A
> 35 °C	0.0	0.0	0.0	0.0	0.0	0.0	0.03	0.0	0.0	0.0	0.0	0.0	0.03	A

Days with Minimum Temperature

1981 to 2010 Canadian Climate Normals station data
Days with Minimum Temperature
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
> 0 °C	0.97	1.2	1.9	9.4	24.7	29.8	31.0	30.9	25.8	12.2	2.1	0.97	170.8	A
<= 2 °C	30.6	27.7	30.4	25.6	12.3	1.3	0.03	0.38	8.8	24.0	29.2	30.6	221.0	A
<= 0 °C	30.0	27.0	29.1	20.6	6.3	0.20	0.0	0.14	4.2	18.8	27.9	30.0	194.4	A
< -2 °C	28.8	25.8	25.6	13.9	2.3	0.0	0.0	0.07	1.4	12.2	24.9	28.8	163.7	A
< -10 °C	17.7	14.4	8.3	1.4	0.0	0.0	0.0	0.0	0.0	1.5	9.9	18.1	71.3	A
< -20 °C	7.3	4.6	2.0	0.03	0.0	0.0	0.0	0.0	0.0	0.23	2.0	5.6	21.7	A
< - 30 °C	1.5	0.43	0.23	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.27	1.3	3.7	A

Days with Rainfall

1981 to 2010 Canadian Climate Normals station data
Days with Rainfall
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 0.2 mm	0.27	0.20	1.3	4.1	10.1	13.8	13.0	10.5	8.7	4.2	1.4	0.40	67.9	A
>= 5 mm	0.0	0.0	0.14	0.53	2.9	5.1	4.2	3.6	2.4	0.47	0.07	0.0	19.3	A
>= 10 mm	0.0	0.0	0.03	0.27	1.4	3.1	2.2	1.7	0.90	0.03	0.0	0.0	9.6	A
>= 25 mm	0.0	0.0	0.0	0.03	0.17	0.93	0.10	0.37	0.23	0.0	0.0	0.0	1.8	A

Days With Snowfall

1981 to 2010 Canadian Climate Normals station data
Days With Snowfall
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 0.2 cm	7.7	7.4	9.5	6.4	2.6	0.07	0.0	0.10	1.3	4.1	7.4	7.7	54.2	A
>= 5 cm	0.47	0.57	1.5	0.97	0.69	0.0	0.0	0.0	0.33	0.57	1.1	0.70	6.9	A
>= 10 cm	0.17	0.10	0.31	0.33	0.31	0.0	0.0	0.0	0.0	0.17	0.20	0.13	1.7	A
>= 25 cm	0.0	0.0	0.0	0.03	0.07	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.10	A

Days with Precipitation

1981 to 2010 Canadian Climate Normals station data
Days with Precipitation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 0.2 mm	7.3	6.8	9.2	9.0	11.2	13.8	13.0	10.6	9.1	7.2	7.6	6.9	111.8	A
>= 5 mm	0.17	0.20	0.93	1.4	3.6	5.1	4.2	3.6	2.7	0.93	0.67	0.37	23.8	A
>= 10 mm	0.07	0.03	0.21	0.47	1.7	3.1	2.2	1.7	1.0	0.17	0.03	0.07	10.7	A
>= 25 mm	0.0	0.0	0.03	0.03	0.21	0.93	0.10	0.37	0.23	0.0	0.0	0.0	1.9	A

Days with Snow Depth

1981 to 2010 Canadian Climate Normals station data
Days with Snow Depth
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
>= 1 cm	18.9	16.3	12.6	4.4	1.4	0.0	0.0	0.0	0.33	3.1	11.6	17.0	85.6	A
>= 5 cm	8.6	7.4	7.0	2.0	0.80	0.0	0.0	0.0	0.03	1.4	5.6	8.0	40.9	A
>= 10 cm	4.3	2.5	2.1	0.83	0.20	0.0	0.0	0.0	0.0	0.27	1.6	4.6	16.3	A
>= 20 cm	1.0	0.03	0.28	0.13	0.07	0.0	0.0	0.0	0.0	0.0	0.20	0.90	2.6	A

Wind

1981 to 2010 Canadian Climate Normals station data
Wind
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Speed (km/h)	13.9	13.7	14.6	16.1	16.1	15.0	13.5	12.7	13.4	14.0	13.4	13.7	14.2	A
Most Frequent Direction	S	S	S	N	N	N	N	N	S	S	S	S	S	A
Maximum Hourly Speed (km/h)	84	89	85	105	90	82	82	97	84	93	84	100
Date (yyyy/dd)	1934/ 23	1972/ 16	1951/ 15+	1935/ 13	1946/ 08	1963/ 22	1944/ 06	1931/ 03	1964/ 05	1993/ 27	1941/ 24	1933/ 23
Direction of Maximum Hourly Speed	N	NW	NW	N	NW	N	NW	N	N	N	W	N
Maximum Gust Speed (km/h)	127	126	114	116	121	127	122	109	111	117	113	111
Date (yyyy/dd)	1976/ 27	1972/ 16	1974/ 21	1974/ 26	1976/ 11	1956/ 10	1971/ 23	1973/ 05	1984/ 06	1989/ 10	1975/ 03	1962/ 21+
Direction of Maximum Gust	W	N	N	N	N	S	N	N	NW	NW	W	N
Days with Winds >= 52 km/h	3.1	2.1	2.2	2.2	2.6	2.1	1.8	1.7	2.1	2.5	2.1	3.1	27.7	A
Days with Winds >= 63 km/h	1.0	0.6	0.4	0.7	0.8	0.4	0.5	0.3	0.5	0.7	0.6	0.8	7.3	A

Degree Days

1981 to 2010 Canadian Climate Normals station data
Degree Days
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Above 24 °C	0	0	0	0	0	0	0.2	0	0	0	0	0	0.2	A
Above 18 °C	0	0	0	0	1.2	5	20.3	16	2.4	0.1	0	0	44.9	A
Above 15 °C	0	0	0	0.4	7.8	22.7	65.6	57.3	13.4	1.1	0	0	168.1	A
Above 10 °C	0	0.3	0.3	9	52.5	116.7	202.2	183	72	14.2	0.3	0	650.5	A
Above 5 °C	2.4	4	9.6	52.5	159.7	260.6	356.7	335	186.1	69.6	9	2.1	1447.2	A
Above 0 °C	21.5	27.7	60.4	155.9	305.5	410.5	511.7	489.8	329.4	180.2	47.6	19.9	2560.3	A
Below 0 °C	241.3	178.5	109.2	18.8	0.7	0	0	0	0.4	20.6	119.9	231.1	920.6	A
Below 5 °C	377.1	296	213.4	65.4	9.9	0.1	0	0.2	7	65	231.4	368.3	1633.7	A
Below 10 °C	529.8	433.4	359.1	171.9	57.7	6.1	0.5	3.2	43	164.6	372.7	521.2	2663.1	A
Below 15 °C	684.8	574.3	513.8	313.3	168	62.2	18.9	32.5	134.4	306.5	522.4	676.2	4,007	A
Below 18 °C	777.8	659	606.8	402.9	254.4	134.4	66.6	84.2	213.4	398.5	612.4	769.2	4979.5	A

Evaporation

1981 to 2010 Canadian Climate Normals station data
Evaporation
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Lake Evaporation (mm)						5.1	5	4.4	3.2

Bright Sunshine

1981 to 2010 Canadian Climate Normals station data
Bright Sunshine
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Total Hours	119.5	144.6	177.2	220.2	249.4	269.9	314.1	284.0	207.0	175.4	121.1	114.0	2396.3	C
Days with measurable	27.0	25.5	27.1	28.0	28.7	28.2	30.5	29.7	27.3	28.5	25.0	27.1	332.6	C
% of possible daylight hours	45.6	51.3	48.2	53.1	51.8	54.6	63.1	62.9	54.4	52.7	45.0	46.0	52.4	C
Extreme Daily	9.0	10.5	11.9	14.2	15.6	16.2	16.0	14.7	13.1	11.0	9.6	7.9
Date (yyyy/dd)	1998/ 31	1968/ 28+	1990/ 24+	2000/ 29	1973/ 23+	1973/ 26	1968/ 02+	1978/ 03	1993/ 02	1989/ 03+	1968/ 01	1974/ 01+

Humidex

1981 to 2010 Canadian Climate Normals station data
Humidex
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Extreme Humidex	17.3	21.9	25.2	27.2	31.6	33.3	36.9	36.0	32.9	28.7	22.2	19.4
Date (yyyy/dd)	2003/ 07	1992/ 27	2004/ 30	1977/ 24	1956/ 31	1961/ 16	2002/ 13	1971/ 02	1967/ 05	1980/ 06	1975/ 04	1999/ 27
Days with Humidex >= 30	0.0	0.0	0.0	0.0	0.1	0.5	4.0	2.7	0.5	0.0	0.0	0.0	7.8	A
Days with Humidex >= 35	0.0	0.0	0.0	0.0	0.0	0.0	0.2	0.1	0.0	0.0	0.0	0.0	0.3	A
Days with Humidex >= 40	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	A

Wind Chill

1981 to 2010 Canadian Climate Normals station data
Wind Chill
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Extreme Wind Chill (°C)	-52	-53	-45	-37	-24	-6	0	-4	-12	-34	-48	-55
Date (yyyy/dd)	1954/ 16	1989/ 01	1976/ 02	1954/ 01	1954/ 01	1969/ 11	1953/ 01+	1992/ 24	1972/ 25	1984/ 31	1985/ 26	1964/ 15
Days with Wind Chill < -20	11.8	8.3	5.1	0.5	0.0	0.0	0.0	0.0	0.0	0.7	4.5	10.8	41.6	A
Days with Wind Chill < -30	6.1	2.9	1.2	0.0	0.0	0.0	0.0	0.0	0.0	0.1	1.3	4.0	15.6	A
Days with Wind Chill < -40	1.2	0.4	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.2	0.9	2.7	A

Humidity

1981 to 2010 Canadian Climate Normals station data
Humidity
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Average Vapour Pressure (kPa)	0.3	0.3	0.4	0.5	0.7	1	1.2	1.1	0.8	0.5	0.4	0.3	0.6	A
Average Relative Humidity - 0600LST (%)	66	67.7	71.2	70.2	71.9	76	78.3	79.3	75.8	69.4	69.4	65.7	71.7	A
Average Relative Humidity - 1500LST (%)	54.5	53.2	50.3	40.7	43.5	48.6	46.8	44.6	44.3	44.3	54	55.3	48.3	A

Pressure

1981 to 2010 Canadian Climate Normals station data
Pressure
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
Average Station Pressure (kPa)	88.8	88.8	88.8	88.9	88.9	89	89.2	89.2	89.1	89	88.7	88.8	88.9	A
Average Sea Level Pressure (kPa)	101.7	101.8	101.6	101.5	101.4	101.4	101.5	101.6	101.7	101.6	101.6	101.7	101.6	A

Visibility (hours with)

1981 to 2010 Canadian Climate Normals station data
Visibility (hours with)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
< 1 km	11.3	8	13.3	5.4	3.2	0.8	0.2	1.3	2	5.7	9	4.8	65	B
1 to 9 km	86.2	97.2	105.9	59.4	38.4	22.5	6.2	25.8	27.4	41.2	73.6	81.5	665.2	B
> 9 km	646.5	572.5	624.9	655.2	702.4	696.8	737.7	716.9	690.6	697.1	637.4	657.7	8035.6	B

Cloud Amount (hours with)

1981 to 2010 Canadian Climate Normals station data
Cloud Amount (hours with)
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year	Code
0 to 2 tenths	195.7	175.5	161.4	149.1	143.3	145.9	235.3	234.7	230.2	210.8	187.9	202.6	2272.3	B
3 to 7 tenths	157	141.2	170.4	178.8	191.3	204.2	221.7	200.4	166.5	169.4	156.3	165.5	2122.8	B
8 to 10 tenths	391.3	361.1	412.1	392.1	409.4	369.9	287	308.9	323.3	363.8	375.8	375.9	4370.6	B

Frost-Free

1981 to 2010 Canadian Climate Normals station data
Frost-Free
	Date/Days	Code
Average Date of Last Spring Frost	May 21	A
Average Date of First Fall Frost	Sept 16	A
Average Length of Frost-Free Period	117 Days	A

1981 to 2010 Canadian Climate Normals station data
Frost-Free
	10%	25%	33%	50%	66%	75%	90%
Probability of last temperature in spring <= 0°C, on or after (Date)	Jun 11	Jun 06	Jun 01	May 26	May 21	May 19	May 11
Probability of first temperature in fall <= 0°C, on or before (Date)	Aug 27	Sep 03	Sep 06	Sep 10	Sep 15	Sep 19	Sep 26
Probability of frost-free period equal to or less than indicated period (Days)	80	93	97	105	114	118	131

Legend

A = WMO "3 and 5 rule" (i.e. no more than 3 consecutive and no more than 5 total missing for either temperature or precipitation)
B = At least 25 years
C = At least 20 years

D = At least 15 years
+ = First or oldest date of occurrence of the extreme value

Station / Element Metadata

Statistics listed below are provided as a guide to determine the validity of Normals and Extremes calculations. For example, a station with 30 years of record between 1981 and 2010 with no missing years would be a more reliable normal than a station with 15 years of record and 2 missing years. Less than 100% possible observations indicates that out of the total number of observations used, some records were missing.

CALGARY INT'L A

Province/Territory

Latitude (dd mm):

51 07 N

Country

CAN

Longitude (ddd mm):

114 01 W

Time Zone

MST

Latitude (decimal degrees):

51.11 N

Climate ID:

3031093

Longitude (decimal degrees):

114.02 W

WMO ID:

71877

Elevation (m):

1084.1

TC ID:

YYC

Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Daily Average (°C)	1981	2010	30	0	10955	100
Standard Deviation	1981	2010	30	0	10955	100
Daily Maximum (°C)	1981	2010	30	0	10955	100
Daily Minimum (°C)	1981	2010	30	0	10955	100
Extreme Maximum (°C)	1881	2010			46376	99.9
Extreme Minimum (°C)	1881	2010			46346	99.9

Precipitation

1981 to 2010 Canadian Climate Normals Element Metadata
Precipitation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Rainfall (mm)	1981	2010	30	1	10895	99.5
Snowfall (cm)	1981	2010	30	1	10895	99.5
Precipitation (mm)	1981	2010	30	1	10895	99.5
Average Snow Depth (cm)	1981	2010	30	0	10956	100
Median Snow Depth (cm)	1981	2010	30	0	10956	100
Snow Depth at Month-end (cm)	1981	2010	30	0	360	100
Extreme Daily Rainfall (mm)	1881	2010			46375	99.9
Extreme Daily Snowfall (cm)	1881	2010			46375	99.9
Extreme Daily Precipitation (mm)	1881	2010			46375	99.9
Extreme Snow Depth (cm)	1955	2010			20453	100

Days with Maximum Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Maximum Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
<= 0 °C	1981	2010	30	1	10895	99.5
> 0 °C	1981	2010	30	1	10895	99.5
> 10 °C	1981	2010	30	1	10895	99.5
> 20 °C	1981	2010	30	1	10895	99.5
> 30 °C	1981	2010	30	1	10895	99.5
> 35 °C	1981	2010	30	1	10895	99.5

Days with Minimum Temperature

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Minimum Temperature
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
> 0 °C	1981	2010	30	1	10895	99.5
<= 2 °C	1981	2010	30	1	10895	99.5
<= 0 °C	1981	2010	30	1	10895	99.5
< -2 °C	1981	2010	30	1	10895	99.5
< -10 °C	1981	2010	30	1	10895	99.5
< -20 °C	1981	2010	30	1	10895	99.5
< - 30 °C	1981	2010	30	1	10895	99.5

Days with Rainfall

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Rainfall
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 0.2 mm	1981	2010	30	1	10895	99.5
>= 5 mm	1981	2010	30	1	10895	99.5
>= 10 mm	1981	2010	30	1	10895	99.5
>= 25 mm	1981	2010	30	1	10895	99.5

Days With Snowfall

1981 to 2010 Canadian Climate Normals Element Metadata
Days With Snowfall
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 0.2 cm	1981	2010	30	1	10895	99.5
>= 5 cm	1981	2010	30	1	10895	99.5
>= 10 cm	1981	2010	30	1	10895	99.5
>= 25 cm	1981	2010	30	1	10895	99.5

Days with Precipitation

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Precipitation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 0.2 mm	1981	2010	30	1	10895	99.5
>= 5 mm	1981	2010	30	1	10895	99.5
>= 10 mm	1981	2010	30	1	10895	99.5
>= 25 mm	1981	2010	30	1	10895	99.5

Days with Snow Depth

1981 to 2010 Canadian Climate Normals Element Metadata
Days with Snow Depth
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
>= 1 cm	1981	2010	30	1	10926	99.7
>= 5 cm	1981	2010	30	1	10926	99.7
>= 10 cm	1981	2010	30	1	10926	99.7
>= 20 cm	1981	2010	30	1	10926	99.7

Wind

1981 to 2010 Canadian Climate Normals Element Metadata
Wind
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Speed (km/h)	1981	2010	30	0	262887	100
Most Frequent Direction	1981	2010	30	0	262890	100
Maximum Hourly Speed (km/h)	1930	2010			705682	99.7
Maximum Gust Speed (km/h)	1955	2010			20339	99.4
Days with Winds >= 52 km/h	1981	2010	30	1	10895	99.5
Days with Winds >= 63 km/h	1981	2010	30	1	10895	99.5

Degree Days

1981 to 2010 Canadian Climate Normals Element Metadata
Degree Days
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Above 24 °C	1981	2010	30	1	10895	99.5
Above 18 °C	1981	2010	30	1	10895	99.5
Above 15 °C	1981	2010	30	1	10895	99.5
Above 10 °C	1981	2010	30	1	10895	99.5
Above 5 °C	1981	2010	30	1	10895	99.5
Above 0 °C	1981	2010	30	1	10895	99.5
Below 0 °C	1981	2010	30	1	10895	99.5
Below 5 °C	1981	2010	30	1	10895	99.5
Below 10 °C	1981	2010	30	1	10895	99.5
Below 15 °C	1981	2010	30	1	10895	99.5
Below 18 °C	1981	2010	30	1	10895	99.5

Evaporation

1981 to 2010 Canadian Climate Normals Element Metadata
Evaporation
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Lake Evaporation (mm)	1981	1994	13	3	1522	89.1

Bright Sunshine

1981 to 2010 Canadian Climate Normals Element Metadata
Bright Sunshine
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Total Hours	1981	2005	25	1	210384	98.7
Days with measurable	1981	2005	25	1	210384	98.7
% of possible daylight hours	1981	2005	25	1	210384	98.7
Extreme Daily	1951	2005			464922	99.3

Humidex

1981 to 2010 Canadian Climate Normals Element Metadata
Humidex
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Extreme Humidex	1953	2010			508264	100
Days with Humidex >= 30	1981	2010	30	0	262856	100
Days with Humidex >= 35	1981	2010	30	0	262856	100
Days with Humidex >= 40	1981	2010	30	0	262856	100

Wind Chill

1981 to 2010 Canadian Climate Normals Element Metadata
Wind Chill
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Extreme Wind Chill (°C)	1953	2010			508333	100
Days with Wind Chill < -20	1981	2010	30	0	262885	100
Days with Wind Chill < -30	1981	2010	30	0	262885	100
Days with Wind Chill < -40	1981	2010	30	0	262885	100

Humidity

1981 to 2010 Canadian Climate Normals Element Metadata
Humidity
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Average Vapour Pressure (kPa)	1981	2010	30	0	262856	100
Average Relative Humidity - 0600LST (%)	1981	2010	30	0	10952	100
Average Relative Humidity - 1500LST (%)	1981	2010	30	0	10953	100

Pressure

1981 to 2010 Canadian Climate Normals Element Metadata
Pressure
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Average Station Pressure (kPa)	1981	2010	30	0	262891	100
Average Sea Level Pressure (kPa)	1981	2010	30	0	262889	100

Visibility (hours with)

1981 to 2010 Canadian Climate Normals Element Metadata
Visibility (hours with)
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
< 1 km	1981	2010	28	4	230952	87.8
1 to 9 km	1981	2010	28	4	230952	87.8
> 9 km	1981	2010	28	4	230952	87.8

Cloud Amount (hours with)

1981 to 2010 Canadian Climate Normals Element Metadata
Cloud Amount (hours with)
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
0 to 2 tenths	1981	2010	28	4	231672	88.1
3 to 7 tenths	1981	2010	28	4	231672	88.1
8 to 10 tenths	1981	2010	28	4	231672	88.1

Frost-Free

1981 to 2010 Canadian Climate Normals Element Metadata
Frost-Free
	Begin Year	End Year	Total Number of Years	Missing Years	Total Count of Observations	% of Possible Observations
Average Date of Last Spring Frost	1981	2010	28	2	28	93.3
Average Date of First Fall Frost	1981	2010	28	2	28	93.3
Average Length of Frost-Free Period	1981	2010	28	2	28	93.3
Probability of last temperature in spring <= 0°C, on or after (Date)
10 %	1886	2010			121	96.8
25 %	1886	2010			121	96.8
33 %	1886	2010			121	96.8
50 %	1886	2010			121	96.8
66 %	1886	2010			121	96.8
75 %	1886	2010			121	96.8
90 %	1886	2010			121	96.8
Probability of first temperature in fall <= 0°C, on or before (Date)
10 %	1886	2010			121	96.8
25 %	1886	2010			121	96.8
33 %	1886	2010			121	96.8
50 %	1886	2010			121	96.8
66 %	1886	2010			121	96.8
75 %	1886	2010			121	96.8
90 %	1886	2010			121	96.8
Probability of frost-free period equal to or less than indicated period (Days)
10 %	1886	2010			121	96.8
25 %	1886	2010			121	96.8
33 %	1886	2010			121	96.8
50 %	1886	2010			121	96.8
66 %	1886	2010			121	96.8
75 %	1886	2010			121	96.8
90 %	1886	2010			121	96.8

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Date modified:: 2025-10-15

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Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
CALGARY INT'L A

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Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate NormalsCALGARY INT'L A

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Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
CALGARY INT'L A