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.

TERRACE 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)-3.0-0.92.46.310.614.216.516.312.16.40.7-2.66.6A
Standard Deviation3.12.31.71.31.71.51.41.21.31.12.32.80.7A
Daily Maximum (°C)-1.11.75.810.815.719.121.421.116.09.02.6-0.810.1A
Daily Minimum (°C)-5.0-3.4-1.11.75.59.211.611.58.23.7-1.1-4.53.0A
Extreme Maximum (°C)9.412.716.926.034.636.537.336.232.221.413.411.3
Date (yyyy/dd)1962/ 302005/ 281994/ 282005/ 261983/ 292004/ 202009/ 291990/ 111974/ 011993/ 021980/ 051980/ 15
Extreme Minimum (°C)-25.0-25.0-19.4-8.3-2.20.63.32.8-1.4-13.5-25.3-26.7
Date (yyyy/dd)1969/ 011956/ 152003/ 081966/ 121964/ 131960/ 041955/ 011973/ 311983/ 281984/ 311985/ 261964/ 16
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)91.761.858.864.755.750.852.861.2111.5185.2132.299.01025.3A
Snowfall (cm)88.451.934.38.50.40.00.00.00.04.856.087.1331.5A
Precipitation (mm)173.5110.692.373.756.450.852.861.2111.5190.3187.1180.91340.8A
Average Snow Depth (cm)1714510000003144A
Median Snow Depth (cm)1513500000001124A
Snow Depth at Month-end (cm)1693000000011175A
Extreme Daily Rainfall (mm)115.079.042.743.439.635.439.471.8106.6114.893.0111.4
Date (yyyy/dd)2007/ 241961/ 051960/ 162001/ 241985/ 031993/ 221966/ 191978/ 061988/ 281978/ 311956/ 021990/ 07
Extreme Daily Snowfall (cm)99.1113.444.249.66.10.00.00.00.321.339.482.8
Date (yyyy/dd)1974/ 171999/ 112007/ 281981/ 041965/ 031954/ 011954/ 011953/ 011972/ 271956/ 312003/ 271990/ 03
Extreme Daily Precipitation (mm)115.099.753.259.239.635.439.471.8106.6114.895.8142.0
Date (yyyy/dd)2007/ 241999/ 112007/ 281981/ 041985/ 031993/ 221966/ 191978/ 061988/ 281978/ 311956/ 021991/ 20
Extreme Snow Depth (cm)16519116548300002356160
Date (yyyy/dd)1974/ 181972/ 201972/ 101971/ 011965/ 031955/ 011955/ 011955/ 011955/ 011964/ 291975/ 261957/ 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 °C12.67.32.20000000.235.113.941.4A
> 0 °C18.420.928.830313031313030.824.917.1323.8A
> 10 °C00.033.615.72829.9313129.211.40.400180.2A
> 20 °C0000.975.610.716.516.34.60.130054.8A
> 30 °C00000.100.901.91.300004.1A
> 35 °C000000.070.100.0300000.20A
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 °C6.37.11322.230.430313129.827.913.85.9248.4A
<= 2 °C30.527.627.516.83.50.03000.578.525.430.4170.8A
<= 0 °C24.821.1187.80.600000.173.116.225.1116.9A
< -2 °C16.913.791.8000000.807.817.167A
< -10 °C6.32.90.790000000.071.54.716.3A
< -20 °C0.750.07000000000.170.431.4A
< - 30 °C0000000000000A
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 mm11.71013.314.414.814.714.113.416.621.716.811.1172.4A
>= 5 mm5.13.443.93.73.33.54.16.410.47.24.959.9A
>= 10 mm2.921.61.81.11.31.41.93.46.24.2330.8A
>= 25 mm0.830.370.280.370.170.070.200.130.801.51.21.17A
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 cm14.69.78.93.20.3700001.511.415.665.1A
>= 5 cm5.53.41.90.53000000.333.25.420.3A
>= 10 cm2.81.60.830.07000000.231.62.69.6A
>= 25 cm0.660.200.140.030000000.470.472A
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 mm20.615.317.515.414.814.714.113.416.621.821.920.9206.8A
>= 5 mm9.66.364.33.83.33.54.16.410.69.79.377A
>= 10 mm5.73.52.821.21.31.41.93.46.36540.6A
>= 25 mm1.60.670.480.470.170.070.200.130.801.61.91.79.8A
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 cm25.218.310.81.6000000.409.523.188.9A
>= 5 cm19.913.76.91.1000000.175.717.965.3A
>= 10 cm16.511.85.40.67000000.033.413.751.5A
>= 20 cm10.583.90.330000001.78.633A
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)17.115.513.312.912.212.711.811.111.011.713.015.113.1A
Most Frequent DirectionNNSSSSSSSSNNSA
Maximum Hourly Speed (km/h)728089936880649568698080
Date (yyyy/dd)1958/ 111957/ 131956/ 031984/ 151964/ 231958/ 241958/ 302008/ 211961/ 192010/ 101957/ 241963/ 31
Direction of Maximum Hourly SpeedNSSESSSSNSSSSE
Maximum Gust Speed (km/h)113120100124105116898992113121121
Date (yyyy/dd)1960/ 281991/ 042010/ 281984/ 151965/ 161962/ 241959/ 121966/ 141964/ 151961/ 301968/ 281963/ 31
Direction of Maximum GustSESSSSESWSESESESESESE
Days with Winds >= 52 km/h2.40.90.60.60.30.20.10.10.30.60.71.88.5A
Days with Winds >= 63 km/h0.50.10.00.10.00.00.00.00.00.20.10.21.2A
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 °C000000.30.70.600001.6A
Above 18 °C00001.18.922.718.60.900052.3A
Above 15 °C0000.45.728.864.6587.8000165.2A
Above 10 °C0006.549.6126.9202194.673.35.500658.4A
Above 5 °C0.10.27.256.1175.4275.2356.9349.5213.761.33.50.21499.3A
Above 0 °C23.233.488.9189.2329.8425.2511.9504.5363.6199.356.920.52746.4A
Below 0 °C115.557.216.40.4000001.834.6102.1327.9A
Below 5 °C247.4165.289.617.30.60000.118.8131.2236.8907A
Below 10 °C402.3306.1237.5117.629.81.70.10.19.7118277.8391.61892.3A
Below 15 °C557.3447.3392.5261.5140.853.617.718.594.2267.5427.7546.63225.3A
Below 18 °C650.3532485.5351.2229.3123.768.872.2177.3360.5517.7639.64,208A
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 Hours46.874.1110.7159.3201.3203.3214.4203.0132.273.436.531.51486.5D
Days with measurable13.918.123.826.828.627.428.428.125.121.014.111.9266.9D
% of possible daylight hours19.027.130.237.840.539.541.643.934.522.414.213.730.4D
Extreme Daily7.39.811.013.615.315.915.515.512.610.79.47.0
Date (yyyy/dd)1996/ 311996/ 291991/ 251989/ 281985/ 311984/ 201985/ 021999/ 021993/ 011987/ 071997/ 031994/ 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 Humidex8.412.616.428.034.638.039.338.534.123.314.512.5
Date (yyyy/dd)1963/ 062005/ 281994/ 281956/ 211983/ 291969/ 122009/ 301990/ 111988/ 031987/ 011986/ 031980/ 15
Days with Humidex >= 300.00.00.00.00.10.82.92.20.10.00.00.06.1A
Days with Humidex >= 350.00.00.00.00.00.00.30.40.00.00.00.00.7A
Days with Humidex >= 400.00.00.00.00.00.00.00.00.00.00.00.00.0A
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-41-36-30-14-6000-4-24-42-42
Date (yyyy/dd)1969/ 011975/ 121976/ 022007/ 042002/ 061955/ 011955/ 011955/ 011983/ 281984/ 311985/ 271968/ 31
Days with Wind Chill < -205.82.00.60.00.00.00.00.00.00.01.33.713.3A
Days with Wind Chill < -301.70.20.00.00.00.00.00.00.00.00.21.03.0A
Days with Wind Chill < -400.00.00.00.00.00.00.00.00.00.00.00.00.0A
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)0.50.50.50.60.811.21.21.10.80.60.50.8A
Average Relative Humidity - 0600LST (%)83.582.682.882.381.281.282.984.588.991.488.985.484.6A
Average Relative Humidity - 1500LST (%)79.972.363.954.150.551.653.755.265.378.284.383.566A
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)98.798.898.798.8999999.299.19998.898.598.798.9A
Average Sea Level Pressure (kPa)101.4101.5101.4101.5101.6101.6101.8101.7101.7101.4101.2101.4101.5A
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 km33.819.110.22.910.30.71.75.712.526.333.6147.6C
1 to 9 km237.6157.71245629.117.721.925.768.2147.2229240.11354.2C
> 9 km472.6499.8609.8661.1714702721.4716.6646.2584.3464.7470.37262.8C
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 tenths99104.295.7108.4100.596.7116140.110674.375.984.81201.5C
3 to 7 tenths76.499.6125.4147.5169.8177.7167.3169.2134.610673.982.61529.8C
8 to 10 tenths568.5472.9523464.2473.8445.7460.7434.8479.4563.7570.2576.66033.3C
Frost-Free
1981 to 2010 Canadian Climate Normals station data
Frost-Free
Date/Days Code
Average Date of Last Spring Frost Apr 25 A
Average Date of First Fall Frost Oct 17 A
Average Length of Frost-Free Period 174 Days A
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 20May 12May 10May 04Apr 26Apr 21Apr 11
Probability of first temperature in fall of 0 °C or lower on or after indicated dates10%25%33%50%66%75%90%
DateSep 28Oct 08Oct 11Oct 16Oct 20Oct 27Nov 07
Probability of frost-free period equal to or less than indicated period (Days)10%25%33%50%66%75%90%
Days142153155166174181195

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.

TERRACE A

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