Canadian Climate Normals 1981-2010 Station Data

Temperature and Precipitation Graph
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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.

STEWART A *
BRITISH COLUMBIA

* This station meets WMO standards for temperature and precipitation.

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Normals Station Data
(all elements)
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)-3.0-1.11.96.110.713.915.114.311.16.30.6-2.16.1A
Standard Deviation2.82.01.41.21.51.10.90.90.91.02.42.41.6A
Daily Maximum (°C)-0.52.35.811.015.818.919.818.814.78.92.70.19.9A
Daily Minimum (°C)-5.5-4.5-2.01.15.58.910.49.87.43.6-1.7-4.32.4A
Extreme Maximum (°C)10.011.315.625.530.833.133.032.726.220.211.611.2
Date (yyyy/dd)2006/ 011998/ 161998/ 202005/ 261983/ 292004/ 191991/ 231977/ 181989/ 082003/ 012002/ 122002/ 14
Extreme Minimum (°C)-24.5-22.4-19.5-8.6-2.80.74.62.8-1.2-12.2-24.8-25.6
Date (yyyy/dd)2005/ 131986/ 192002/ 092002/ 032002/ 061982/ 111978/ 021986/ 151992/ 141984/ 311985/ 271984/ 30
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)88.157.685.673.471.865.673.0122.4217.3268.3123.991.91338.9A
Snowfall (cm)162.885.638.815.80.50.00.00.10.09.7112.7144.3570.2A
Precipitation (mm)238.0137.0121.889.172.365.673.0122.4217.3278.0230.1222.21866.8A
Average Snow Depth (cm)81967014000000144827C
Median Snow Depth (cm)7995719000000114826C
Snow Depth at Month-end (cm)9597460000001335827A
Extreme Daily Rainfall (mm)89.432.843.859.639.438.633.085.085.2110.2123.7113.8
Date (yyyy/dd)1989/ 251984/ 182000/ 311992/ 011999/ 221976/ 301988/ 252000/ 211992/ 281980/ 281976/ 031990/ 06
Extreme Daily Snowfall (cm)105.765.447.196.010.00.00.02.00.032.560.8104.5
Date (yyyy/dd)1976/ 161985/ 131987/ 041997/ 012001/ 021975/ 011975/ 011981/ 031975/ 011975/ 311989/ 271984/ 05
Extreme Daily Precipitation (mm)112.667.647.1100.439.438.633.085.085.2110.2123.7120.8
Date (yyyy/dd)2003/ 052005/ 101987/ 041997/ 011999/ 221976/ 301988/ 252000/ 211992/ 281980/ 281976/ 031990/ 06
Extreme Snow Depth (cm)24023119615758000033122182
Date (yyyy/dd)1989/ 251975/ 221976/ 121976/ 011976/ 011975/ 011975/ 011975/ 011975/ 011975/ 311994/ 301978/ 24
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 °C12.45.61.70.00.00.00.00.00.00.154.711.235.7A
> 0 °C18.622.729.330.031.030.031.031.030.030.925.319.8329.6A
> 10 °C0.00.112.216.028.830.031.031.028.310.70.190.08178.2A
> 20 °C0.00.00.01.25.410.712.910.42.00.040.00.042.6A
> 30 °C0.00.00.00.00.040.540.280.190.00.00.00.01.1A
> 35 °C0.00.00.00.00.00.00.00.00.00.00.00.00.0A
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 °C3.84.510.920.630.230.031.031.029.726.810.84.8234.1C
<= 2 °C31.028.130.219.42.90.040.00.01.09.326.030.8178.7C
<= 0 °C27.223.720.19.40.840.00.00.00.284.219.226.2131.1C
< -2 °C18.115.710.33.40.040.00.00.00.01.69.816.074.9C
< -10 °C6.64.71.30.00.00.00.00.00.00.041.74.418.8C
< -20 °C0.850.110.00.00.00.00.00.00.00.00.310.321.6C
< - 30 °C0.00.00.00.00.00.00.00.00.00.00.00.00.0C
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 mm11.410.315.816.416.115.416.417.420.223.216.112.0190.6A
>= 5 mm5.94.15.64.95.15.25.57.410.914.37.55.982.3A
>= 10 mm2.81.72.51.91.71.92.04.47.29.24.12.842.2A
>= 25 mm0.520.220.350.190.270.120.120.812.52.91.00.429.4A
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 cm14.39.27.22.50.080.00.00.040.01.710.814.760.6A
>= 5 cm8.14.42.30.920.040.00.00.00.00.736.37.530.4A
>= 10 cm5.53.01.10.460.040.00.00.00.00.384.34.719.6A
>= 25 cm1.90.850.230.080.00.00.00.00.00.00.961.35.3A
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 mm20.015.118.216.616.115.416.417.420.223.321.420.5220.5A
>= 5 mm12.48.07.55.65.15.25.57.410.914.712.612.0107.0A
>= 10 mm7.84.63.72.51.71.92.04.47.29.58.27.260.8A
>= 25 mm2.31.30.810.380.270.120.120.812.53.02.52.216.3A
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 cm31.028.228.711.10.040.00.00.00.01.115.429.1144.5D
>= 5 cm30.728.227.910.00.040.00.00.00.00.5012.528.3138.0D
>= 10 cm30.628.227.28.80.00.00.00.00.00.1910.627.9133.4D
>= 20 cm30.027.925.67.30.00.00.00.00.00.086.523.6120.9D
Wind
1981 to 2010 Canadian Climate Normals station data
Wind
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Maximum Hourly Speed (km/h)434857484646393533484650
Date (yyyy/dd)2006/ 221990/ 151999/ 121987/ 161993/ 291995/ 101998/ 051990/ 281996/ 261991/ 121992/ 101975/ 05
Direction of Maximum Hourly SpeedSNSSSSSSSSWSS
Maximum Gust Speed (km/h)616150546550395646636574
Date (yyyy/dd)1978/ 051975/ 031975/ 191981/ 161982/ 201983/ 081975/ 061978/ 041980/ 161979/ 181978/ 011975/ 05
Direction of Maximum GustNNSSWSSNSSWNWSSW
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 °C0000000000000C
Above 18 °C00000.22.83.82.100008.9C
Above 15 °C00002.617.529.717.50.800068.1C
Above 10 °C0003.844.5118.4161.1134.5452.300509.6C
Above 5 °C002.248.5176.9267.9316.1289.3182.257.31.80.21342.5C
Above 0 °C16.426.875181.7331.7417.9471.1444.3332.1194.95119.12,562C
Below 0 °C108.358.217.30.1000001.335.981.8302.9C
Below 5 °C246.9172.699.516.90.30000.218.6136.8217.9909.5C
Below 10 °C401.9313.7252.3122.122.90.500.112.9118.7284.9372.71902.7C
Below 15 °C556.9454.8407.3268.4135.949.623.638.2118.8271.4434.9527.73287.4C
Below 18 °C649.9539.4500.3358.4226.5124.990.7115.8207.9364.4524.9620.74323.8C
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 Hours25.740.073.5119.8157.7145.0138.1126.585.239.919.714.4985.4C
Days with measurable11.614.420.924.427.225.424.923.821.216.19.98.0227.7C
% of possible daylight hours10.814.920.128.231.227.726.327.122.212.37.96.519.6C
Extreme Daily4.05.97.811.011.211.411.310.98.67.24.44.1
Date (yyyy/dd)1990/ 292000/ 271993/ 311979/ 262008/ 311982/ 181979/ 051999/ 011988/ 022000/ 021998/ 011998/ 21
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 Humidex9.410.415.225.330.138.939.037.528.321.210.59.9
Date (yyyy/dd)1998/ 311998/ 161998/ 212005/ 262004/ 192004/ 222009/ 291990/ 121988/ 022003/ 011998/ 062002/ 15
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)-30-29-26-12-1000-3-13-37-32
Date (yyyy/dd)1975/ 101975/ 122003/ 082007/ 041986/ 101975/ 011975/ 011975/ 011992/ 141984/ 301985/ 261984/ 30
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 - 1500LST (%)8679.670.157.452.858.365.370.477.380.887.789.572.9C
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 12 C
Average Length of Frost-Free Period 165 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 dates10%25%33%50%66%75%90%
DateMay 15May 07May 05Apr 29Apr 23Apr 18Apr 15
Probability of first temperature in fall of 0 °C or lower on or before indicated dates10%25%33%50%66%75%90%
DateSep 30Oct 07Oct 11Oct 15Oct 16Oct 21Oct 29
Probability of frost-free period equal to or less than indicated period (Days)10%25%33%50%66%75%90%
Days146154155167175180195

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.

STEWART A

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