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.

LETHBRIDGE A
ALBERTA

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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)-6.0-4.2-0.16.011.115.218.217.712.66.6-1.2-5.45.9A
Standard Deviation4.94.43.71.71.51.31.61.71.91.73.84.51.1A
Daily Maximum (°C)0.12.36.413.118.322.026.126.020.213.74.80.612.8A
Daily Minimum (°C)-12.1-10.6-6.5-1.13.98.310.39.54.9-0.6-7.2-11.4-1.1A
Extreme Maximum (°C)17.421.826.831.134.238.339.438.936.731.722.818.3
Date (yyyy/dd)2005/ 241992/ 272004/ 301939/ 281986/ 301941/ 231973/ 102001/ 031950/ 031943/ 041949/ 061939/ 05
Extreme Minimum (°C)-42.8-42.2-38.0-25.6-11.7-1.70.9-1.0-9.4-26.7-34.7-42.8
Date (yyyy/dd)1950/ 031939/ 092002/ 081940/ 111954/ 011951/ 011999/ 161992/ 251972/ 251984/ 311996/ 211968/ 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)0.20.32.315.545.182.042.636.439.510.42.00.5276.7C
Snowfall (cm)15.412.922.513.44.80.00.00.81.99.916.714.1112.4C
Precipitation (mm)13.512.022.828.049.982.042.637.341.420.117.812.9380.2C
Average Snow Depth (cm)4320000000231D
Median Snow Depth (cm)3310000000121D
Snow Depth at Month-end (cm)3200000001241D
Extreme Daily Rainfall (mm)3.36.910.053.185.478.263.571.179.536.66.89.9
Date (yyyy/dd)1948/ 211958/ 252005/ 111951/ 301980/ 232002/ 081982/ 011993/ 162005/ 101946/ 021986/ 051939/ 20
Extreme Daily Snowfall (cm)25.124.433.552.832.510.90.016.855.135.837.821.6
Date (yyyy/dd)1989/ 051953/ 221972/ 251967/ 281955/ 141951/ 051938/ 011992/ 221968/ 211946/ 251944/ 011945/ 07
Extreme Daily Precipitation (mm)18.824.430.754.685.478.263.571.179.539.137.821.6
Date (yyyy/dd)1949/ 071953/ 221972/ 251974/ 271980/ 232002/ 081982/ 011993/ 162005/ 101946/ 021944/ 011945/ 07
Extreme Snow Depth (cm)384246867400520202536
Date (yyyy/dd)1978/ 301978/ 021972/ 271967/ 301967/ 011955/ 011955/ 011992/ 221968/ 221957/ 231958/ 251968/ 23
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 °C11.69.26.71.20.00.00.00.00.01.57.010.948.1A
> 0 °C19.419.024.328.831.030.031.031.030.029.523.020.1317.1A
> 10 °C3.45.611.720.928.129.731.030.927.422.77.63.0221.8A
> 20 °C0.00.040.334.112.219.327.627.115.55.70.270.0112.1A
> 30 °C0.00.00.00.040.521.56.17.82.10.040.00.018.1A
> 35 °C0.00.00.00.00.00.00.500.810.150.00.00.01.5A
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 °C3.32.84.512.225.029.931.030.926.415.34.82.8188.7A
<= 2 °C29.627.229.222.710.31.00.080.527.220.927.529.8205.9A
<= 0 °C27.725.426.517.96.00.110.00.073.715.725.228.2176.5A
< -2 °C25.423.222.511.12.00.00.00.01.49.920.725.9142.2A
< -10 °C15.612.77.21.40.040.00.00.00.01.79.215.162.9A
< -20 °C7.55.01.90.00.00.00.00.00.00.352.85.923.4A
< - 30 °C2.11.10.370.00.00.00.00.00.00.00.351.55.5A
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 mm0.300.191.65.810.911.69.28.08.74.91.60.7363.3A
>= 5 mm0.00.040.110.892.74.02.52.22.00.420.080.015.0A
>= 10 mm0.00.00.040.301.32.61.21.10.810.120.00.07.4A
>= 25 mm0.00.00.00.00.300.810.190.150.310.040.00.01.8A
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 cm7.87.18.74.21.40.00.00.110.582.96.77.546.9C
>= 5 cm0.560.521.20.960.410.00.00.040.190.691.00.636.2C
>= 10 cm0.150.070.480.260.110.00.00.040.00.190.230.041.6C
>= 25 cm0.040.00.00.00.00.00.00.00.00.00.00.00.04C
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 mm8.07.19.68.711.611.69.28.08.96.87.77.9105.0C
>= 5 mm0.480.331.31.93.14.02.52.32.11.20.920.4620.6C
>= 10 mm0.110.070.410.561.42.61.21.20.850.350.230.08.9C
>= 25 mm0.00.00.00.00.300.810.190.150.310.040.00.01.8C
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 cm17.314.410.62.90.500.00.00.040.082.310.117.275.6D
>= 5 cm8.37.45.91.10.200.00.00.040.01.15.28.738.0D
>= 10 cm4.93.52.80.160.00.00.00.00.00.482.22.616.7D
>= 20 cm0.560.00.170.00.00.00.00.00.00.00.060.00.79D
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)20.519.218.019.719.217.515.314.216.119.019.820.818.3A
Most Frequent DirectionWWWWWWWWWWWWWA
Maximum Hourly Speed (km/h)1091001009711397898997105121113
Date (yyyy/dd)1962/ 251965/ 191956/ 031964/ 101965/ 161960/ 011962/ 021961/ 311953/ 181965/ 011962/ 191953/ 31
Direction of Maximum Hourly SpeedWSWSWWWSWWSWWWSWSW
Maximum Gust Speed (km/h)140143138138148137122122124153171148
Date (yyyy/dd)1964/ 161965/ 191961/ 011961/ 011965/ 161961/ 301964/ 221963/ 141961/ 031965/ 011962/ 191963/ 23
Direction of Maximum GustSWSWSWSWSWSWWSWSWWWSW
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 °C000000.10.60.90.10001.7A
Above 18 °C0000.12.813.140.1417.70.500105.4A
Above 15 °C0001.413.743.4104100.827.82.700293.9A
Above 10 °C0.20.31.416.773.9157.4250.6240.7105.725.41.70874A
Above 5 °C5.67.519.476.2195.2304.8405.2394.7231.498.3184.31760.7A
Above 0 °C37.244.987.1194.5344.8454.8560.2549.5377.8221.671.434.62978.4A
Below 0 °C223.6162.389.712.60.1000018.1108.4202.6817.6A
Below 5 °C347266.117744.45.6000.23.749.8205327.41,426A
Below 10 °C496.7399.9314134.839.32.60.41.228131.9338.7478.12365.5A
Below 15 °C651.4540.7467.6269.5134.138.68.816.3100.1264.2487633.13611.4A
Below 18 °C744.4625.4560.6358.2216.298.337.849.6170355577726.14518.6A
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
Extreme Daily8.710.311.914.015.015.315.314.213.210.69.08.0
Date (yyyy/dd)1993/ 311990/ 281994/ 301989/ 301991/ 291994/ 211991/ 031986/ 011995/ 021994/ 041994/ 051994/ 01
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 Humidex17.321.826.330.235.437.740.939.836.130.123.017.8
Date (yyyy/dd)2005/ 241992/ 272004/ 301987/ 281971/ 122005/ 212002/ 111972/ 091967/ 011991/ 112010/ 041980/ 16
Days with Humidex >= 300.00.00.00.00.51.98.28.51.90.00.00.021.0A
Days with Humidex >= 350.00.00.00.00.00.11.00.80.00.00.00.01.9A
Days with Humidex >= 400.00.00.00.00.00.00.10.00.00.00.00.00.1A
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)-55-51-50-33-16-70-3-14-36-47-56
Date (yyyy/dd)1957/ 241996/ 021960/ 021954/ 011954/ 022000/ 011953/ 011992/ 251972/ 251991/ 291985/ 271968/ 28
Days with Wind Chill < -2011.88.24.40.40.00.00.00.00.00.75.210.941.5A
Days with Wind Chill < -305.73.71.30.00.00.00.00.00.00.31.64.617.1A
Days with Wind Chill < -401.60.70.20.00.00.00.00.00.00.00.21.44.1A
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)0.30.30.40.50.711.21.10.80.60.40.30.6A
Average Relative Humidity - 0600LST (%)68.471.27471.972.475.176.978.977.271.17067.172.9A
Average Relative Humidity - 1500LST (%)57.954.249.339.540.24440.13840.4435457.646.5A
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)90.790.790.690.690.690.790.890.990.890.790.690.790.7A
Average Sea Level Pressure (kPa)101.8101.9101.7101.5101.4101.3101.4101.5101.6101.6101.6101.8101.6A
Radiation
1981 to 2010 Canadian Climate Normals station data
Radiation
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Net - RF4 (MJ/m2)-66-289318026530324613226-46
Extreme Net - RF4 (MJ/m2)149141517171411521
Date (yyyy/dd)1985/ 281973/ 281974/ 271985/ 271975/ 281974/ 261975/ 141976/ 061977/ 031984/ 031984/ 091981/ 13
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 km9.19.810.452.10.41.11.30.33.414.17.664.5D
1 to 9 km75.56183.239.623.5204.31217.128.271.663.2499D
> 9 km659.4607650.4675.4718.4699.6738.7730.8702.7712.5634.3673.28202.2D
Frost-Free
1981 to 2010 Canadian Climate Normals station data
Frost-Free
Date/Days Code
Average Date of Last Spring Frost May 20 A
Average Date of First Fall Frost Sept 17 A
Average Length of Frost-Free Period 119 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 31May 24May 22May 18May 14May 12May 06
Probability of first temperature in fall of 0 °C or lower on or before indicated dates10%25%33%50%66%75%90%
DateSep 03Sep 10Sep 13Sep 18Sep 22Sep 24Oct 04
Probability of frost-free period equal to or less than indicated period (Days)10%25%33%50%66%75%90%
Days102110115119127133142

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.

LETHBRIDGE A

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