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
COWICHAN LAKE FORESTRY

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.

COWICHAN LAKE FORESTRY *
BRITISH COLUMBIA
Current Station Operator: CCN

48°49'28.000" N

124°08'00.000" W

176.80 m

1012040

* 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)	3.4	4.0	5.9	8.5	12.0	14.9	17.7	18.2	15.2	10.1	5.5	2.9	9.8	A
Standard Deviation	1.5	1.4	1.3	1.0	1.4	1.4	1.2	1.1	1.2	1.0	1.6	1.4	1.3	A
Daily Maximum (°C)	6.1	7.6	10.1	13.3	17.2	20.2	23.9	24.7	21.3	14.2	8.3	5.4	14.3	A
Daily Minimum (°C)	0.6	0.4	1.7	3.6	6.7	9.4	11.5	11.7	9.1	5.9	2.6	0.4	5.3	A
Extreme Maximum (°C)	14.0	18.5	22.0	28.0	33.0	35.0	37.2	38.0	36.0	28.5	18.3	16.0
Date (yyyy/dd)	1986/ 13	1991/ 26	1994/ 28	1998/ 30	1983/ 28	1969/ 17	1965/ 30	1981/ 08	1988/ 03	1987/ 01	1970/ 02	2005/ 24
Extreme Minimum (°C)	-17.8	-16.7	-14.4	-5.6	-3.9	0.6	1.7	3.9	-1.1	-5.5	-15.0	-15.0
Date (yyyy/dd)	1950/ 14	1950/ 01	1955/ 04	1951/ 20	1954/ 01	1950/ 06	1974/ 14	1955/ 26	1950/ 30	1984/ 31	1985/ 23	1968/ 29

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)	331.8	222.3	213.9	139.8	86.2	58.0	36.6	45.1	55.4	221.9	378.9	319.9	2109.7	A
Snowfall (cm)	27.2	26.1	10.6	1.4	0.3	0.0	0.0	0.0	0.0	0.8	11.1	19.8	97.2	A
Precipitation (mm)	359.0	248.3	224.5	141.2	86.5	58.0	36.6	45.1	55.4	222.7	390.0	339.7	2206.9	A
Average Snow Depth (cm)	3	2	0	0	0	0	0	0	0	0	1	2	1	A
Median Snow Depth (cm)	1	1	0	0	0	0	0	0	0	0	0	1	0	A
Snow Depth at Month-end (cm)	3	0	0	0	0	0	0	0	0	0	3	3	1	C
Extreme Daily Rainfall (mm)	145.5	114.4	140.4	76.7	57.7	57.9	51.6	93.9	57.2	117.8	134.2	121.9
Date (yyyy/dd)	1961/ 14	1991/ 01	1997/ 17	1970/ 05	1973/ 23	1956/ 08	1974/ 16	1991/ 29	1953/ 27	2003/ 16	1995/ 07	1993/ 09
Extreme Daily Snowfall (cm)	48.3	40.6	29.2	15.2	6.0	0.0	0.0	0.0	0.0	15.6	23.0	50.8
Date (yyyy/dd)	1975/ 11	1969/ 07	1962/ 04	1975/ 02	1986/ 12	1949/ 01	1949/ 09	1949/ 01	1949/ 01	1984/ 31	1985/ 26	1964/ 31
Extreme Daily Precipitation (mm)	149.4	114.4	140.4	76.7	57.7	57.9	51.6	93.9	57.2	117.8	134.2	121.9
Date (yyyy/dd)	1999/ 28	1991/ 01	1997/ 17	1970/ 05	1973/ 23	1956/ 08	1974/ 16	1991/ 29	1953/ 27	2003/ 16	1995/ 07	1993/ 09
Extreme Snow Depth (cm)	48	50	22	1	0	0	0	0	0	2	34	47
Date (yyyy/dd)	2000/ 12	1990/ 08	1991/ 02	1982/ 14	1981/ 01	1981/ 01	1981/ 01	1980/ 01	1981/ 01	1991/ 29	1985/ 27	1996/ 29

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	1.0	0.22	0.12	0.0	0.0	0.0	0.0	0.0	0.0	0.04	0.68	1.5	3.6	C
> 0 °C	30.0	28.0	30.9	30.0	31.0	30.0	31.0	31.0	30.0	31.0	29.3	29.5	361.6	C
> 10 °C	2.6	4.9	13.5	21.6	29.7	30.0	31.0	31.0	30.0	26.7	8.3	1.5	230.7	C
> 20 °C	0.0	0.0	0.19	3.2	8.0	13.2	22.9	25.1	16.7	2.3	0.0	0.0	91.6	C
> 30 °C	0.0	0.0	0.0	0.0	0.27	1.4	3.2	3.5	0.56	0.0	0.0	0.0	9.0	C
> 35 °C	0.0	0.0	0.0	0.0	0.0	0.0	0.31	0.23	0.04	0.0	0.0	0.0	0.58	C

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	17.5	14.8	20.8	25.9	30.6	30.0	31.0	31.0	30.0	29.7	22.2	16.0	299.5	A
<= 2 °C	19.6	19.0	18.3	10.8	2.5	0.0	0.0	0.0	0.20	4.0	13.8	22.1	110.3	A
<= 0 °C	13.5	13.4	10.2	4.1	0.38	0.0	0.0	0.0	0.0	1.4	7.8	15.0	65.7	A
< -2 °C	5.7	5.4	2.4	0.15	0.0	0.0	0.0	0.0	0.0	0.35	2.5	6.3	22.9	A
< -10 °C	0.37	0.22	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.23	0.31	1.1	A
< -20 °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
< - 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	18.7	15.7	19.6	17.1	14.4	12.2	7.1	6.8	8.1	16.0	20.0	19.0	174.6	A
>= 5 mm	12.3	8.8	10.6	8.1	5.5	4.1	2.2	2.6	3.3	9.5	14.6	11.7	93.2	A
>= 10 mm	9.5	6.6	6.7	4.8	2.8	1.5	1.1	1.3	2.0	6.7	10.9	9.1	63.0	A
>= 25 mm	4.3	3.0	2.4	1.1	0.46	0.24	0.23	0.48	0.48	3.0	5.5	5.0	26.2	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	4.8	3.6	2.6	0.62	0.08	0.0	0.0	0.0	0.0	0.08	1.9	3.9	17.6	A
>= 5 cm	1.9	1.9	0.58	0.08	0.04	0.0	0.0	0.0	0.0	0.08	0.85	1.7	7.1	A
>= 10 cm	0.81	1.0	0.27	0.08	0.0	0.0	0.0	0.0	0.0	0.04	0.38	0.65	3.3	A
>= 25 cm	0.11	0.07	0.04	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.04	0.26	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	21.0	17.3	20.2	17.1	14.4	12.2	7.1	6.8	8.1	16.1	20.8	21.0	182.1	A
>= 5 mm	13.9	10.3	11.1	8.2	5.5	4.1	2.2	2.6	3.3	9.5	15.1	13.0	98.7	A
>= 10 mm	10.4	7.5	7.1	4.8	2.8	1.5	1.1	1.3	2.0	6.8	11.2	9.9	66.4	A
>= 25 mm	4.8	3.3	2.6	1.1	0.46	0.24	0.23	0.48	0.48	3.0	5.5	5.1	27.3	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	6.4	5.3	2.0	0.13	0.0	0.0	0.0	0.0	0.0	0.04	2.0	6.5	22.3	D
>= 5 cm	5.6	3.8	1.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	1.5	4.6	16.5	D
>= 10 cm	3.6	2.6	0.25	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.88	2.2	9.5	D
>= 20 cm	0.73	1.0	0.08	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.27	0.42	2.5	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	0	0.9	0.6	0	0	0	0	1.4	C
Above 18 °C	0	0	0	0	1.2	9.7	31.7	36	6.4	0	0	0	84.9	C
Above 15 °C	0	0	0	0.4	10	35.9	91	101.7	36.6	1.3	0	0	276.8	C
Above 10 °C	0	0.1	1.4	17.5	75.8	147.6	238.8	253.3	157	35.8	2.5	0.1	929.9	C
Above 5 °C	16.6	17.8	45.6	107.2	215.8	297.1	393.8	408.3	306.3	158.8	44.8	11.6	2023.8	C
Above 0 °C	114.2	118.4	183.6	254.6	370.7	447.1	548.8	563.3	456.3	312.3	169	99.5	3637.9	C
Below 0 °C	10.2	5	0.6	0	0	0	0	0	0	0.1	4.4	9.9	30.2	C
Below 5 °C	67.7	45.5	17.5	2.6	0.1	0	0	0	0	1.7	30.2	77.1	242.2	C
Below 10 °C	206.1	168.8	128.4	62.8	15.1	0.6	0	0	0.7	33.7	137.8	220.5	974.4	C
Below 15 °C	361	309.9	282	195.8	104.3	38.8	7.2	3.4	30.3	154.1	285.4	375.5	2147.5	C
Below 18 °C	454	394.5	375	285.4	188.5	102.6	40.9	30.7	90	245.9	375.4	468.5	3051.3	C

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	47.3	75.2	106.1	141.5	173.6	177.9	233.1	226.7	182.8	112.4	49.1	39.3	1564.9	D
Days with measurable	17.1	20.0	25.2	26.0	28.3	27.5	29.1	29.3	28.1	24.6	17.0	16.0	288.0	D
% of possible daylight hours	17.4	26.3	28.8	34.5	36.7	36.9	47.8	50.9	48.2	33.4	17.8	15.2	32.8	D
Extreme Daily	7.5	8.9	9.8	11.8	13.2	14.3	13.8	12.6	11.3	9.7	7.9	7.2
Date (yyyy/dd)	1996/ 31	1990/ 28	1975/ 25	1980/ 30	1986/ 30	1975/ 29	1976/ 26	1951/ 05	1976/ 08	1975/ 01	1995/ 01	1980/ 06

Frost-Free

1981 to 2010 Canadian Climate Normals station data
Frost-Free
	Date/Days	Code
Average Date of Last Spring Frost	Apr 19	C
Average Date of First Fall Frost	Nov 03	C
Average Length of Frost-Free Period	197 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 25	May 07	May 02	Apr 26	Apr 20	Apr 15	Apr 06
Probability of first temperature in fall of 0 °C or lower on or before indicated dates	10%	25%	33%	50%	66%	75%	90%
Date	Oct 10	Oct 19	Oct 21	Oct 29	Nov 03	Nov 09	Nov 18
Probability of frost-free period equal to or less than indicated period (Days)	10%	25%	33%	50%	66%	75%	90%
Days	148	165	173	184	197	199	220

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.

COWICHAN LAKE FORESTRY

Province/Territory

Latitude (dd mm):

48 49 N

Country

CAN

Longitude (ddd mm):

124 08 W

Time Zone

PST

Latitude (decimal degrees):

48.82 N

Climate ID:

1012040

Longitude (decimal degrees):

124.13 W

WMO ID:

Elevation (m):

176.8

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	9490	100
Standard Deviation	1981	2007	27	1	9490	100
Daily Maximum (°C)	1981	2007	27	1	9492	100
Daily Minimum (°C)	1981	2007	27	1	9495	100
Extreme Maximum (°C)	1949	2007			21025	99.7
Extreme Minimum (°C)	1949	2007			21027	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	2007	27	1	9434	99.4
Snowfall (cm)	1981	2007	27	1	9434	99.4
Precipitation (mm)	1981	2007	27	1	9434	99.4
Average Snow Depth (cm)	1981	2007	26	1	9321	98.2
Median Snow Depth (cm)	1981	2007	26	1	9321	98.2
Snow Depth at Month-end (cm)	1981	2007	27	1	310	99.4
Extreme Daily Rainfall (mm)	1949	2007			21082	100
Extreme Daily Snowfall (cm)	1949	2007			21085	100
Extreme Daily Precipitation (mm)	1949	2007			21082	100
Extreme Snow Depth (cm)	1970	2007			9523	99

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	2	9405	99
> 0 °C	1981	2007	27	2	9405	99
> 10 °C	1981	2007	27	2	9405	99
> 20 °C	1981	2007	27	2	9405	99
> 30 °C	1981	2007	27	2	9405	99
> 35 °C	1981	2007	27	2	9405	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	2007	27	1	9495	100
<= 2 °C	1981	2007	27	1	9495	100
<= 0 °C	1981	2007	27	1	9495	100
< -2 °C	1981	2007	27	1	9495	100
< -10 °C	1981	2007	27	1	9495	100
< -20 °C	1981	2007	27	1	9495	100
< - 30 °C	1981	2007	27	1	9495	100

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	9434	99.4
>= 5 mm	1981	2007	27	1	9434	99.4
>= 10 mm	1981	2007	27	1	9434	99.4
>= 25 mm	1981	2007	27	1	9434	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	2007	27	1	9495	100
>= 5 cm	1981	2007	27	1	9495	100
>= 10 cm	1981	2007	27	1	9495	100
>= 25 cm	1981	2007	27	1	9495	100

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	9434	99.4
>= 5 mm	1981	2007	27	1	9434	99.4
>= 10 mm	1981	2007	27	1	9434	99.4
>= 25 mm	1981	2007	27	1	9434	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	2007	26	2	8914	94
>= 5 cm	1981	2007	26	2	8914	94
>= 10 cm	1981	2007	26	2	8914	94
>= 20 cm	1981	2007	26	2	8914	94

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	9344	98.4
Above 18 °C	1981	2007	27	2	9344	98.4
Above 15 °C	1981	2007	27	2	9344	98.4
Above 10 °C	1981	2007	27	2	9344	98.4
Above 5 °C	1981	2007	27	2	9344	98.4
Above 0 °C	1981	2007	27	2	9344	98.4
Below 0 °C	1981	2007	27	2	9344	98.4
Below 5 °C	1981	2007	27	2	9344	98.4
Below 10 °C	1981	2007	27	2	9344	98.4
Below 15 °C	1981	2007	27	2	9344	98.4
Below 18 °C	1981	2007	27	2	9344	98.4

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	2001	21	1	178896	96.8
Days with measurable	1981	2001	21	1	178896	96.8
% of possible daylight hours	1981	2001	21	1	178896	96.8
Extreme Daily	1951	2002			437445	99.5

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	23	2	23	88.5
Average Date of First Fall Frost	1981	2006	23	2	23	88.5
Average Length of Frost-Free Period	1981	2006	23	2	23	88.5
Probability of last temperature in spring <= 0°C, on or after (Date)
10 %	1950	2006	56	10	46	80.7
25 %	1950	2006	56	10	46	80.7
33 %	1950	2006	56	10	46	80.7
50 %	1950	2006	56	10	46	80.7
66 %	1950	2006	56	10	46	80.7
75 %	1950	2006	56	10	46	80.7
90 %	1950	2006	56	10	46	80.7
Probability of first temperature in fall <= 0°C, on or before (Date)
10 %	1950	2006	56	10	46	80.7
25 %	1950	2006	56	10	46	80.7
33 %	1950	2006	56	10	46	80.7
50 %	1950	2006	56	10	46	80.7
66 %	1950	2006	56	10	46	80.7
75 %	1950	2006	56	10	46	80.7
90 %	1950	2006	56	10	46	80.7
Probability of frost-free period equal to or less than indicated period (Days)
10 %	1950	2006	56	10	46	80.7
25 %	1950	2006	56	10	46	80.7
33 %	1950	2006	56	10	46	80.7
50 %	1950	2006	56	10	46	80.7
66 %	1950	2006	56	10	46	80.7
75 %	1950	2006	56	10	46	80.7
90 %	1950	2006	56	10	46	80.7

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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
COWICHAN LAKE FORESTRY

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Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate NormalsCOWICHAN LAKE FORESTRY

Page details

Temperature and Precipitation Graph for 1981 to 2010 Canadian Climate Normals
COWICHAN LAKE FORESTRY