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
SARNIA AIRPORT

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.

SARNIA AIRPORT *
ONTARIO

42°59'32.058" N

82°18'17.088" W

180.60 m

6127514

* 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)	-4.8	-3.7	0.6	6.9	12.7	18.2	21.1	20.0	16.4	10.1	4.3	-1.8	8.3	A
Standard Deviation	2.9	2.3	1.9	1.5	1.9	1.4	1.3	1.3	1.4	1.3	1.6	2.9	1.0	A
Daily Maximum (°C)	-1.2	0.2	4.9	12.0	18.3	23.8	26.4	25.2	21.7	14.7	8.0	1.5	13.0	A
Daily Minimum (°C)	-8.3	-7.5	-3.6	1.7	7.1	12.6	15.8	14.8	11.0	5.3	0.6	-5.1	3.7	A
Extreme Maximum (°C)	15.0	19.4	25.6	31.2	32.9	39.1	37.3	37.9	34.4	29.4	23.3	18.0
Date (yyyy/dd)	1995/ 14	2000/ 26	1986/ 30	1990/ 25	1987/ 30	1988/ 25	1988/ 06	2001/ 08	1983/ 10	1971/ 02	1974/ 01	1998/ 06
Extreme Minimum (°C)	-28.9	-26.9	-25.6	-10.0	-3.0	-1.1	6.1	1.2	-1.6	-8.9	-12.8	-23.6
Date (yyyy/dd)	1976/ 18	1978/ 04	1978/ 02	1972/ 07	1978/ 03	1972/ 11	1972/ 06	2000/ 05	1991/ 28	1972/ 20	1971/ 23	1988/ 12

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)	22.9	26.4	38.0	66.8	79.7	83.1	78.5	78.5	104.7	75.6	76.3	39.6	770.0	A
Snowfall (cm)	31.0	24.9	19.1	4.5	0.0	0.0	0.0	0.0	0.0	0.5	5.9	26.1	112.0	A
Precipitation (mm)	51.5	50.9	57.5	71.5	79.7	83.1	78.5	78.5	104.7	76.1	82.4	63.9	878.2	A
Average Snow Depth (cm)	7	7	3	0	0	0	0	0	0	0	0	3	2	A
Median Snow Depth (cm)	7	6	1	0	0	0	0	0	0	0	0	3	1	A
Snow Depth at Month-end (cm)	8	6	0	0	0	0	0	0	0	0	0	5	2	A
Extreme Daily Rainfall (mm)	29.6	39.0	46.2	51.2	41.6	88.5	72.4	59.4	95.8	63.8	54.4	37.6
Date (yyyy/dd)	2006/ 17	1985/ 23	1974/ 04	2000/ 20	2004/ 23	1984/ 17	1997/ 01	1985/ 24	1996/ 07	1979/ 01	2005/ 15	1967/ 21
Extreme Daily Snowfall (cm)	23.6	33.0	33.3	21.4	0.0	0.0	0.0	0.0	0.0	17.8	18.5	38.0
Date (yyyy/dd)	1979/ 13	1985/ 12	1973/ 17	2005/ 24	1970/ 01	1968/ 01	1968/ 01	1968/ 01	1968/ 01	1972/ 19	1976/ 04	2000/ 11
Extreme Daily Precipitation (mm)	39.8	39.0	46.2	51.2	41.6	88.5	72.4	59.4	95.8	63.8	54.4	37.6
Date (yyyy/dd)	2006/ 17	1985/ 23	1974/ 04	2000/ 20	2004/ 23	1984/ 17	1997/ 01	1985/ 24	1996/ 07	1979/ 01	2005/ 15	1967/ 21
Extreme Snow Depth (cm)	60	43	38	23	0	0	0	0	0	8	17	53
Date (yyyy/dd)	2001/ 05	1982/ 06	1973/ 18	1975/ 04	1970/ 01	1968/ 01	1968/ 01	1968/ 01	1968/ 01	1972/ 19	2002/ 27	2000/ 31

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	17.2	13.5	7.1	0.48	0.0	0.0	0.0	0.0	0.0	0.0	1.7	11.1	51.0	A
> 0 °C	13.8	14.8	23.9	29.5	31.0	30.0	31.0	31.0	30.0	31.0	28.4	19.9	314.2	A
> 10 °C	0.88	1.2	5.8	16.2	27.9	30.0	31.0	31.0	30.0	25.0	10.1	2.0	211.0	A
> 20 °C	0.0	0.0	0.84	4.5	11.9	22.3	29.1	28.5	18.3	5.1	0.23	0.0	120.8	A
> 30 °C	0.0	0.0	0.0	0.04	0.76	3.9	6.0	2.9	1.0	0.0	0.0	0.0	14.6	A
> 35 °C	0.0	0.0	0.0	0.0	0.0	0.15	0.28	0.12	0.0	0.0	0.0	0.0	0.55	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	3.0	3.0	6.2	19.2	30.4	30.0	31.0	31.0	29.9	28.2	15.5	5.3	232.5	A
<= 2 °C	30.1	27.5	27.8	17.2	3.3	0.0	0.0	0.04	0.23	7.2	19.6	29.2	162.1	A
<= 0 °C	28.0	25.2	24.8	10.8	0.64	0.0	0.0	0.0	0.08	2.8	14.5	25.7	132.7	A
< -2 °C	25.0	22.1	18.4	5.0	0.0	0.0	0.0	0.0	0.0	0.65	8.4	19.5	99.2	A
< -10 °C	11.5	8.9	3.6	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.15	6.3	30.4	A
< -20 °C	1.2	0.77	0.08	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.28	2.3	A
< - 30 °C	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

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	5.0	4.9	7.5	12.4	12.6	10.9	10.9	10.4	11.4	12.2	11.5	7.2	116.7	A
>= 5 mm	1.7	1.8	2.7	4.8	5.0	4.7	4.3	4.6	5.3	4.5	4.3	2.9	46.7	A
>= 10 mm	0.65	1.0	1.3	2.1	2.8	2.4	2.3	2.5	3.5	2.6	2.4	1.3	24.9	A
>= 25 mm	0.08	0.15	0.15	0.24	0.52	0.68	0.72	0.68	1.1	0.35	0.65	0.12	5.5	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	11.3	8.4	7.0	2.4	0.0	0.0	0.0	0.0	0.0	0.19	3.0	9.0	41.4	A
>= 5 cm	1.7	1.5	1.4	0.16	0.0	0.0	0.0	0.0	0.0	0.0	0.23	1.7	6.6	A
>= 10 cm	0.46	0.50	0.38	0.04	0.0	0.0	0.0	0.0	0.0	0.0	0.12	0.54	2.0	A
>= 25 cm	0.0	0.04	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.04	0.08	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	15.0	11.9	12.9	14.0	12.6	10.9	10.9	10.4	11.4	12.2	13.7	14.2	150.0	A
>= 5 mm	3.2	3.2	4.1	5.1	5.0	4.7	4.3	4.6	5.3	4.6	4.6	4.6	53.2	A
>= 10 mm	1.2	1.6	1.7	2.2	2.8	2.4	2.3	2.5	3.5	2.6	2.5	1.7	27.0	A
>= 25 mm	0.08	0.23	0.19	0.24	0.52	0.68	0.72	0.68	1.1	0.38	0.65	0.19	5.7	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	21.5	20.5	11.1	1.6	0.0	0.0	0.0	0.0	0.0	0.0	1.3	12.8	68.8	A
>= 5 cm	14.0	14.4	6.4	0.20	0.0	0.0	0.0	0.0	0.0	0.0	0.32	6.6	42.0	A
>= 10 cm	9.9	7.9	3.5	0.16	0.0	0.0	0.0	0.0	0.0	0.0	0.12	3.3	25.0	A
>= 20 cm	3.2	2.3	0.76	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.88	7.1	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)	19.6	18.0	18.1	18.2	15.7	13.4	12.3	11.8	13.5	16.4	18.5	18.8	16.2	C
Most Frequent Direction	W	S	S	N	N	N	N	S	S	S	S	W	S	C
Maximum Hourly Speed (km/h)	78	81	67	74	65	56	53	67	56	72	83	93
Date (yyyy/dd)	1992/ 14	1987/ 08	1985/ 04	1987/ 04	1983/ 08	1975/ 15	1974/ 04	1987/ 22	1970/ 10	2001/ 16	1978/ 17	1980/ 02
Direction of Maximum Hourly Speed	N	N	E	N	N	SW	W	S	W	W	SW	NW
Maximum Gust Speed (km/h)	100	117	159	109	115	87	102	87	93	106	109	124
Date (yyyy/dd)	1982/ 23	1987/ 08	1991/ 27	1984/ 30	1998/ 31	1975/ 19	1983/ 31	1971/ 10	1987/ 30	2001/ 16	1994/ 21	2000/ 12
Direction of Maximum Gust	SW	N	SW	SW	W	W	W	W	NW	NW	SW	N
Days with Winds >= 52 km/h	2.1	2.1	2.2	1.9	1.1	0.6	0.4	0.3	0.6	1.0	1.9	2.1	16.2	D
Days with Winds >= 63 km/h	0.5	0.6	0.8	0.8	0.4	0.1	0.1	0.2	0.1	0.2	0.5	0.6	4.7	D

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	0.5	4.6	11.9	5.9	0.8	0	0	0	23.7	A
Above 18 °C	0	0	0.1	2.1	14	54.6	104.8	78.2	30	2.3	0	0	286	A
Above 15 °C	0	0	0.9	7.1	34.8	112.2	190.1	157.7	74.5	10.3	0.3	0	587.9	A
Above 10 °C	0	0.1	6	30.3	107.5	247.4	344.8	311.3	194.3	54.8	8.2	1.1	1305.8	A
Above 5 °C	2.1	2.1	23.4	90.3	238.8	396.9	499.8	466.3	341.5	161.7	45.9	7.3	2276.1	A
Above 0 °C	18.9	21.5	77.3	209.3	393.1	546.9	654.8	621.3	491.5	311.7	140.7	40.7	3527.6	A
Below 0 °C	159	124.7	57.7	3.6	0	0	0	0	0	0	10.7	96.2	452	A
Below 5 °C	297.2	246.5	158.8	34.7	0.7	0	0	0	0	5.1	65.9	217.9	1026.7	A
Below 10 °C	450.1	385.7	296.4	124.6	24.5	0.5	0	0	2.9	53.1	178.2	366.6	1882.5	A
Below 15 °C	605.1	526.7	446.3	251.4	106.7	15.3	0.3	1.5	33.1	163.6	320.3	520.5	2990.8	A
Below 18 °C	698.1	611.4	538.5	336.4	178.9	47.7	7.9	15	78.5	248.7	410	613.5	3784.5	A

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	81.7	100.3	139.9	185.2	236.6	266.3	299.1	254.3	191.3	151.2	87.6	67.4	2060.9	C
Days with measurable	19.2	19.4	22.6	24.4	27.6	27.4	30.1	28.3	26.3	25.4	19.6	17.4	287.6	C
% of possible daylight hours	28.0	33.9	37.9	46.2	52.2	58.0	64.3	58.9	50.9	44.1	29.9	24.0	44.0	C
Extreme Daily	9.6	10.8	11.6	13.6	14.8	15.0	15.0	14.2	12.8	10.7	9.8	8.9
Date (yyyy/dd)	1995/ 28	1979/ 26	2000/ 30	1976/ 28	1990/ 30	1971/ 10	1971/ 02	1972/ 04	1991/ 02	1999/ 01	1981/ 03	1994/ 02

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	17.2	21.5	30.0	35.0	38.8	44.3	49.9	47.3	43.8	34.9	26.1	22.4
Date (yyyy/dd)	1995/ 14	2000/ 26	1998/ 30	1990/ 25	1987/ 30	1988/ 25	1995/ 14	1988/ 02	1985/ 07	2002/ 04	1968/ 01	1998/ 06

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)	-41	-38	-30	-19	-7	0	0	0	-4	-9	-20	-32
Date (yyyy/dd)	1994/ 19	1976/ 02	1986/ 07	1982/ 04	1978/ 01	1968/ 03	1968/ 01	1968/ 01	1974/ 23	1974/ 21	1976/ 30	1983/ 26

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 Relative Humidity - 0600LST (%)	83.5	82.8	84	83.2	83.8	86.3	89	91.5	90.5	86.6	84.8	84.7	85.9	C

Frost-Free

1981 to 2010 Canadian Climate Normals station data
Frost-Free
	Date/Days	Code
Average Date of Last Spring Frost	Apr 29	C
Average Date of First Fall Frost	Oct 19	C
Average Length of Frost-Free Period	172 Days	C

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 13	May 08	May 05	Apr 30	Apr 27	Apr 25	Apr 19
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 30	Oct 10	Oct 12	Oct 16	Oct 20	Oct 26	Nov 03
Probability of frost-free period equal to or less than indicated period (Days)	10%	25%	33%	50%	66%	75%	90%
Days	139	161	162	165	180	183	191

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.

SARNIA AIRPORT

Province/Territory

Latitude (dd mm):

42 59 N

Country

CAN

Longitude (ddd mm):

82 18 W

Time Zone

EST

Latitude (decimal degrees):

42.99 N

Climate ID:

6127514

Longitude (decimal degrees):

82.3 W

WMO ID:

Elevation (m):

180.6

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	2006	26	1	9397	99.9
Standard Deviation	1981	2006	26	1	9397	99.9
Daily Maximum (°C)	1981	2006	26	1	9399	100
Daily Minimum (°C)	1981	2006	26	1	9398	100
Extreme Maximum (°C)	1967	2006			13749	99.7
Extreme Minimum (°C)	1967	2006			13747	99.7

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	2006	26	1	9343	99.4
Snowfall (cm)	1981	2006	26	1	9343	99.4
Precipitation (mm)	1981	2006	26	1	9343	99.4
Average Snow Depth (cm)	1981	2006	26	1	9394	99.9
Median Snow Depth (cm)	1981	2006	26	1	9394	99.9
Snow Depth at Month-end (cm)	1981	2006	26	1	309	100
Extreme Daily Rainfall (mm)	1967	2006			13778	99.9
Extreme Daily Snowfall (cm)	1967	2006			13777	99.9
Extreme Daily Precipitation (mm)	1967	2006			13778	99.9
Extreme Snow Depth (cm)	1968	2006			13641	99.8

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	2006	26	1	9311	99
> 0 °C	1981	2006	26	1	9311	99
> 10 °C	1981	2006	26	1	9311	99
> 20 °C	1981	2006	26	1	9311	99
> 30 °C	1981	2006	26	1	9311	99
> 35 °C	1981	2006	26	1	9311	99

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	2006	26	1	9280	98.7
<= 2 °C	1981	2006	26	1	9280	98.7
<= 0 °C	1981	2006	26	1	9280	98.7
< -2 °C	1981	2006	26	1	9280	98.7
< -10 °C	1981	2006	26	1	9280	98.7
< -20 °C	1981	2006	26	1	9280	98.7
< - 30 °C	1981	2006	26	1	9280	98.7

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	2006	26	1	9343	99.4
>= 5 mm	1981	2006	26	1	9343	99.4
>= 10 mm	1981	2006	26	1	9343	99.4
>= 25 mm	1981	2006	26	1	9343	99.4

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	2006	26	1	9343	99.4
>= 5 cm	1981	2006	26	1	9343	99.4
>= 10 cm	1981	2006	26	1	9343	99.4
>= 25 cm	1981	2006	26	1	9343	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	2006	26	1	9343	99.4
>= 5 mm	1981	2006	26	1	9343	99.4
>= 10 mm	1981	2006	26	1	9343	99.4
>= 25 mm	1981	2006	26	1	9343	99.4

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	2006	26	1	9282	98.7
>= 5 cm	1981	2006	26	1	9282	98.7
>= 10 cm	1981	2006	26	1	9282	98.7
>= 20 cm	1981	2006	26	1	9282	98.7

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	2005	25	2	201622	93.3
Most Frequent Direction	1981	2005	25	2	202518	99
Maximum Hourly Speed (km/h)	1967	2005			302025	91.3
Maximum Gust Speed (km/h)	1971	2005			11849	99.3
Days with Winds >= 52 km/h	1981	2005	24	2	8184	92.8
Days with Winds >= 63 km/h	1981	2005	24	2	8184	92.8

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	2006	26	1	9280	98.7
Above 18 °C	1981	2006	26	1	9280	98.7
Above 15 °C	1981	2006	26	1	9280	98.7
Above 10 °C	1981	2006	26	1	9280	98.7
Above 5 °C	1981	2006	26	1	9280	98.7
Above 0 °C	1981	2006	26	1	9280	98.7
Below 0 °C	1981	2006	26	1	9280	98.7
Below 5 °C	1981	2006	26	1	9280	98.7
Below 10 °C	1981	2006	26	1	9280	98.7
Below 15 °C	1981	2006	26	1	9280	98.7
Below 18 °C	1981	2006	26	1	9280	98.7

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	2003	23	1	191280	96.4
Days with measurable	1981	2003	23	1	191280	96.4
% of possible daylight hours	1981	2003	23	1	191280	96.4
Extreme Daily	1970	2003			284449	99.1

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	1967	2005			147096	44.5

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)	1967	2005			147108	44.5

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 Relative Humidity - 0600LST (%)	1981	2005	25	1	8822	97.9

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	2006	22	3	22	84.6
Average Date of First Fall Frost	1981	2006	22	3	22	84.6
Average Length of Frost-Free Period	1981	2006	22	3	22	84.6
Probability of last temperature in spring <= 0°C, on or after (Date)
10 %	1970	2006	36	4	32	86.5
25 %	1970	2006	36	4	32	86.5
33 %	1970	2006	36	4	32	86.5
50 %	1970	2006	36	4	32	86.5
66 %	1970	2006	36	4	32	86.5
75 %	1970	2006	36	4	32	86.5
90 %	1970	2006	36	4	32	86.5
Probability of first temperature in fall <= 0°C, on or before (Date)
10 %	1970	2006	36	4	32	86.5
25 %	1970	2006	36	4	32	86.5
33 %	1970	2006	36	4	32	86.5
50 %	1970	2006	36	4	32	86.5
66 %	1970	2006	36	4	32	86.5
75 %	1970	2006	36	4	32	86.5
90 %	1970	2006	36	4	32	86.5
Probability of frost-free period equal to or less than indicated period (Days)
10 %	1970	2006	36	4	32	86.5
25 %	1970	2006	36	4	32	86.5
33 %	1970	2006	36	4	32	86.5
50 %	1970	2006	36	4	32	86.5
66 %	1970	2006	36	4	32	86.5
75 %	1970	2006	36	4	32	86.5
90 %	1970	2006	36	4	32	86.5

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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
SARNIA AIRPORT

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Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate NormalsSARNIA AIRPORT

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Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
SARNIA AIRPORT