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
ALTONA

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.

ALTONA
MANITOBA

49°06'00.000" N

97°33'00.000" W

247.80 m

5020040

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)	-15.0	-11.8	-4.8	5.1	12.6	17.9	20.3	19.5	13.5	5.6	-4.1	-11.9	3.9	A
Standard Deviation	4.1	4.2	2.7	2.5	1.9	1.9	1.4	1.8	1.5	1.7	3.6	4.3	1.2	A
Daily Maximum (°C)	-10.1	-6.8	-0.1	11.1	19.2	23.7	26.3	26.0	19.8	11.0	0.1	-7.6	9.4	A
Daily Minimum (°C)	-19.9	-16.8	-9.4	-0.9	5.9	12.0	14.3	12.9	7.2	0.2	-8.1	-16.1	-1.6	A
Extreme Maximum (°C)	8.0	14.0	22.2	35.6	36.7	38.0	38.9	40.0	39.0	33.5	25.0	14.4
Date (yyyy/dd)	2003/ 07	2000/ 21	1963/ 31	1952/ 27	1964/ 21	1995/ 17	1975/ 29	1989/ 01	1983/ 02	1992/ 01	1975/ 05	1969/ 01
Extreme Minimum (°C)	-40.0	-40.6	-33.5	-23.9	-13.9	-2.8	2.8	0.0	-6.7	-30.0	-35.0	-37.2
Date (yyyy/dd)	1966/ 28	1966/ 18	1980/ 01	1979/ 02	1967/ 03	1964/ 01	1950/ 13	1965/ 28	1965/ 26	1997/ 29	1985/ 28	1967/ 31

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)	0.5	2.4	12.8	16.6	68.8	101.5	75.0	67.9	45.0	33.5	8.3	1.8	434.1	C
Snowfall (cm)	27.9	18.2	16.8	11.2	1.8	0.0	0.0	0.0	0.0	6.7	21.1	27.9	131.7	C
Precipitation (mm)	28.4	20.6	29.6	27.8	70.6	101.5	75.0	67.9	45.0	40.2	29.4	29.7	565.8	C
Average Snow Depth (cm)				0	0	0	0	0	0	0	0	1
Median Snow Depth (cm)				0	0	0	0	0	0	0	0	0
Extreme Daily Rainfall (mm)	8.0	18.0	60.0	33.5	50.0	116.1	101.3	95.0	77.2	57.7	21.0	18.0
Date (yyyy/dd)	1990/ 10	2000/ 25	2004/ 27	1979/ 17	2005/ 07	1970/ 10	1957/ 11	1995/ 18	1957/ 02	1949/ 10	2000/ 06	1982/ 01
Extreme Daily Snowfall (cm)	22.9	19.6	22.9	45.0	18.0	0.0	0.0	0.0	0.0	24.0	20.0	23.0
Date (yyyy/dd)	1949/ 15	1949/ 23	1966/ 04	1997/ 05	2002/ 08	1949/ 01	1949/ 01	1949/ 01	1949/ 01	2005/ 05	1986/ 07	2006/ 30
Extreme Daily Precipitation (mm)	22.9	24.0	60.0	45.0	50.0	116.1	101.3	95.0	77.2	57.7	21.0	23.0
Date (yyyy/dd)	1949/ 15	1998/ 25	2004/ 27	1997/ 05	2005/ 07	1970/ 10	1957/ 11	1995/ 18	1957/ 02	1949/ 10	2000/ 06	2006/ 30
Extreme Snow Depth (cm)	15	14	0	15	7	0	0	0	0	20	33	14
Date (yyyy/dd)	2006/ 22	1994/ 10	1999/ 31	1999/ 04	2002/ 06	1991/ 01	1991/ 01	1991/ 01	1991/ 01	2005/ 06	1996/ 07	1998/ 18

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	27.6	22.5	14.9	2.5	0.0	0.0	0.0	0.0	0.0	1.3	15.4	26.2	110.3	A
> 0 °C	3.4	5.7	16.1	27.5	31.0	30.0	31.0	31.0	30.0	29.7	14.7	4.8	254.9	A
> 10 °C	0.0	0.08	1.9	16.0	28.1	29.9	31.0	31.0	28.0	16.2	2.2	0.04	184.5	A
> 20 °C	0.0	0.0	0.0	3.8	13.8	22.4	28.6	27.2	13.9	2.5	0.08	0.0	112.3	A
> 30 °C	0.0	0.0	0.0	0.22	1.5	3.1	4.9	5.7	1.2	0.04	0.0	0.0	16.6	A
> 35 °C	0.0	0.0	0.0	0.0	0.0	0.37	0.15	0.52	0.07	0.0	0.0	0.0	1.1	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	0.09	0.24	2.0	11.6	25.8	30.0	31.0	30.9	28.4	15.8	1.9	0.12	177.8	C
<= 2 °C	31.0	28.1	30.8	23.4	8.1	0.15	0.0	0.11	4.2	20.1	29.2	31.0	206.1	C
<= 0 °C	30.9	27.9	29.0	18.4	5.2	0.0	0.0	0.0	1.6	15.3	28.1	30.9	187.2	C
< -2 °C	30.8	26.5	24.0	10.5	1.8	0.0	0.0	0.0	0.37	8.2	24.2	30.0	156.4	C
< -10 °C	26.5	20.5	12.9	1.4	0.0	0.0	0.0	0.0	0.0	0.67	9.6	22.2	93.7	C
< -20 °C	15.7	11.2	3.4	0.0	0.0	0.0	0.0	0.0	0.0	0.04	1.7	10.7	42.8	C
< - 30 °C	3.4	1.9	0.15	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.12	1.2	6.8	C

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	0.15	0.63	2.3	3.6	9.8	11.0	9.6	8.2	7.9	6.6	1.6	0.36	61.7	A
>= 5 mm	0.04	0.22	0.67	1.2	4.5	6.1	4.4	3.5	2.9	2.0	0.63	0.12	26.1	A
>= 10 mm	0.0	0.04	0.33	0.44	2.5	3.3	2.3	2.1	1.4	0.96	0.19	0.04	13.6	A
>= 25 mm	0.0	0.0	0.07	0.0	0.41	0.85	0.69	0.70	0.19	0.22	0.0	0.0	3.1	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	9.0	6.4	5.0	1.7	0.26	0.0	0.0	0.0	0.0	1.2	5.0	8.6	37.3	A
>= 5 cm	1.9	1.1	1.2	0.70	0.15	0.0	0.0	0.0	0.0	0.56	1.5	1.8	8.9	A
>= 10 cm	0.30	0.22	0.27	0.37	0.04	0.0	0.0	0.0	0.0	0.22	0.67	0.36	2.5	A
>= 25 cm	0.0	0.0	0.0	0.04	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.04	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	9.1	6.9	6.9	4.9	10.0	11.0	9.6	8.2	7.9	7.7	6.4	9.1	97.6	C
>= 5 mm	1.9	1.3	1.9	1.8	4.6	6.1	4.4	3.5	2.9	2.4	2.1	2.1	34.8	C
>= 10 mm	0.33	0.30	0.65	0.93	2.5	3.3	2.3	2.1	1.4	1.2	0.85	0.42	16.3	C
>= 25 mm	0.0	0.0	0.08	0.07	0.44	0.85	0.69	0.70	0.19	0.22	0.0	0.0	3.2	C

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				0.67	0.0	0.0	0.0	0.0	0.0	1.1	4.0	5.0
>= 5 cm				0.56	0.0	0.0	0.0	0.0	0.0	0.73	1.0	2.0
>= 10 cm				0.44	0.0	0.0	0.0	0.0	0.0	0.36	0.0	0.0
>= 20 cm				0.0	0.0	0.0	0.0	0.0	0.0	0.09	0.0	0.0

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	0.7	3.8	5.7	5	0.5	0	0	0	15.7	C
Above 18 °C	0	0	0	0.5	12.1	46.8	86.6	72	11.8	0.1	0	0	230	C
Above 15 °C	0	0	0	3	33.3	102.7	168.2	145.5	36.6	1.5	0	0	490.9	C
Above 10 °C	0	0	0	19.5	111.4	237	321.7	294.9	123.2	15.7	0.2	0	1123.6	C
Above 5 °C	0	0	2.5	71.2	237.8	386.2	476.7	449.8	256.5	72.7	5	0	1958.5	C
Above 0 °C	0.5	3.5	25.8	172	387.1	536.2	631.7	604.8	405.5	186.8	29.6	2.1	2985.5	C
Below 0 °C	477.2	339.7	174.9	22	0.1	0	0	0	0	11.3	144.4	378.5	1,548	C
Below 5 °C	631.7	477.1	306.7	71.2	5.8	0	0	0	0.9	52.2	269.8	531.5	2346.8	C
Below 10 °C	786.7	618	459.2	169.5	34.4	0.9	0	0.1	17.7	150.1	415	686.5	3337.8	C
Below 15 °C	941.7	758.8	614.2	303	111.3	16.6	1.5	5.7	81.1	291	564.8	841.5	4,531	C
Below 18 °C	1034.7	843.4	707.2	390.5	183.1	50.6	12.9	25.2	146.3	382.6	654.8	934.5	5365.6	C

Frost-Free

1981 to 2010 Canadian Climate Normals station data
Frost-Free
	Date/Days	Code
Average Date of Last Spring Frost	May 14	D
Average Date of First Fall Frost	Sept 25	D
Average Length of Frost-Free Period	133 Days	D

1981 to 2010 Canadian Climate Normals station data
Frost-Free
Probability of last temperature in spring of 0 °C or lower on or after indicated dates	10%	25%	33%	50%	66%	75%	90%
Date	May 27	May 19	May 18	May 15	May 10	May 08	May 01
Probability of first temperature in fall of 0 °C or lower on or before indicated dates	10%	25%	33%	50%	66%	75%	90%
Date	Sep 14	Sep 19	Sep 21	Sep 25	Sep 28	Oct 01	Oct 05
Probability of frost-free period equal to or less than indicated period (Days)	10%	25%	33%	50%	66%	75%	90%
Days	120	124	128	133	137	139	150

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

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.

ALTONA

Province/Territory

Latitude (dd mm):

49 06 N

Country

CAN

Longitude (ddd mm):

97 33 W

Time Zone

CST

Latitude (decimal degrees):

49.1 N

Climate ID:

5020040

Longitude (decimal degrees):

97.55 W

WMO ID:

Elevation (m):

247.8

TC ID:

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	2007	27	1	9734	99.3
Standard Deviation	1981	2007	27	1	9734	99.3
Daily Maximum (°C)	1981	2007	27	1	9765	99.6
Daily Minimum (°C)	1981	2007	27	1	9743	99.4
Extreme Maximum (°C)	1949	2007			19760	99.5
Extreme Minimum (°C)	1949	2007			19705	99.4

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	2007	27	1	9706	99.1
Snowfall (cm)	1981	2007	27	1	9706	99.1
Precipitation (mm)	1981	2007	27	1	9706	99.1
Average Snow Depth (cm)	1991	2007	17	4	3239	75.4
Median Snow Depth (cm)	1991	2007	17	4	3239	75.4
Extreme Daily Rainfall (mm)	1948	2007			19545	99.7
Extreme Daily Snowfall (cm)	1948	2007			19576	99.8
Extreme Daily Precipitation (mm)	1948	2007			19518	99.5
Extreme Snow Depth (cm)	1980	2007			3596	68.7

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	2007	27	1	9616	98.1
> 0 °C	1981	2007	27	1	9616	98.1
> 10 °C	1981	2007	27	1	9616	98.1
> 20 °C	1981	2007	27	1	9616	98.1
> 30 °C	1981	2007	27	1	9616	98.1
> 35 °C	1981	2007	27	1	9616	98.1

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	2007	27	2	9280	94.7
<= 2 °C	1981	2007	27	2	9280	94.7
<= 0 °C	1981	2007	27	2	9280	94.7
< -2 °C	1981	2007	27	2	9280	94.7
< -10 °C	1981	2007	27	2	9280	94.7
< -20 °C	1981	2007	27	2	9280	94.7
< - 30 °C	1981	2007	27	2	9280	94.7

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	2007	27	1	9768	99.7
>= 5 mm	1981	2007	27	1	9768	99.7
>= 10 mm	1981	2007	27	1	9768	99.7
>= 25 mm	1981	2007	27	1	9768	99.7

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	2007	27	1	9737	99.4
>= 5 cm	1981	2007	27	1	9737	99.4
>= 10 cm	1981	2007	27	1	9737	99.4
>= 25 cm	1981	2007	27	1	9737	99.4

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	2007	27	1	9706	99.1
>= 5 mm	1981	2007	27	1	9706	99.1
>= 10 mm	1981	2007	27	1	9706	99.1
>= 25 mm	1981	2007	27	1	9706	99.1

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	1991	2007	17	4	3210	74.8
>= 5 cm	1991	2007	17	4	3210	74.8
>= 10 cm	1991	2007	17	4	3210	74.8
>= 20 cm	1991	2007	17	4	3210	74.8

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	2007	27	2	9038	92.2
Above 18 °C	1981	2007	27	2	9038	92.2
Above 15 °C	1981	2007	27	2	9038	92.2
Above 10 °C	1981	2007	27	2	9038	92.2
Above 5 °C	1981	2007	27	2	9038	92.2
Above 0 °C	1981	2007	27	2	9038	92.2
Below 0 °C	1981	2007	27	2	9038	92.2
Below 5 °C	1981	2007	27	2	9038	92.2
Below 10 °C	1981	2007	27	2	9038	92.2
Below 15 °C	1981	2007	27	2	9038	92.2
Below 18 °C	1981	2007	27	2	9038	92.2

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	2005	15	9	15	60.0
Average Date of First Fall Frost	1981	2005	15	9	15	60.0
Average Length of Frost-Free Period	1981	2005	15	9	15	60.0
Probability of last temperature in spring <= 0°C, on or after (Date)
10 %	1950	2005	55	23	32	57.1
25 %	1950	2005	55	23	32	57.1
33 %	1950	2005	55	23	32	57.1
50 %	1950	2005	55	23	32	57.1
66 %	1950	2005	55	23	32	57.1
75 %	1950	2005	55	23	32	57.1
90 %	1950	2005	55	23	32	57.1
Probability of first temperature in fall <= 0°C, on or before (Date)
10 %	1950	2005	55	23	32	57.1
25 %	1950	2005	55	23	32	57.1
33 %	1950	2005	55	23	32	57.1
50 %	1950	2005	55	23	32	57.1
66 %	1950	2005	55	23	32	57.1
75 %	1950	2005	55	23	32	57.1
90 %	1950	2005	55	23	32	57.1
Probability of frost-free period equal to or less than indicated period (Days)
10 %	1950	2005	55	23	32	57.1
25 %	1950	2005	55	23	32	57.1
33 %	1950	2005	55	23	32	57.1
50 %	1950	2005	55	23	32	57.1
66 %	1950	2005	55	23	32	57.1
75 %	1950	2005	55	23	32	57.1
90 %	1950	2005	55	23	32	57.1

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Date modified:: 2024-03-27

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Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
ALTONA

Legend

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Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate NormalsALTONA

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Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
ALTONA