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.

ST JOHN'S WEST CDA
NEWFOUNDLAND

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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)-4.5-5.1-2.32.36.911.115.515.812.27.42.8-1.85.0D
Standard Deviation1.62.11.41.51.61.31.71.30.91.41.41.33.0D
Daily Maximum (°C)-0.8-1.11.25.911.315.820.120.216.110.86.01.48.9D
Daily Minimum (°C)-8.1-9.0-5.9-1.42.56.310.811.48.34.0-0.4-5.01.1D
Extreme Maximum (°C)14.414.016.122.026.128.931.130.527.223.319.517.2
Date (yyyy/dd)1976/ 181984/ 051962/ 311986/ 231972/ 301967/ 061975/ 201978/ 131961/ 241976/ 071984/ 061957/ 12
Extreme Minimum (°C)-23.3-26.0-23.5-15.0-7.2-4.4-1.10.6-1.7-5.6-13.5-20.6
Date (yyyy/dd)1957/ 171994/ 091986/ 101994/ 031964/ 051970/ 021952/ 041968/ 211955/ 241972/ 231993/ 251970/ 18
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)88.082.5104.6102.098.3111.590.295.9132.7154.2123.799.11282.6D
Snowfall (cm)73.167.546.415.67.00.00.00.00.02.018.256.4286.1D
Precipitation (mm)162.3151.8153.7119.3105.3111.590.295.9132.7156.2143.6159.41581.9D
Extreme Daily Rainfall (mm)68.658.256.9109.672.471.971.490.977.0100.376.278.7
Date (yyyy/dd)1954/ 071970/ 281961/ 221986/ 111985/ 241973/ 171958/ 201971/ 051990/ 251953/ 061981/ 261966/ 20
Extreme Daily Snowfall (cm)78.250.850.842.027.925.40.00.00.018.830.045.7
Date (yyyy/dd)1966/ 091959/ 151961/ 211978/ 141968/ 141975/ 101951/ 011951/ 011951/ 011991/ 281986/ 191954/ 29
Extreme Daily Precipitation (mm)78.272.075.8109.672.471.971.490.977.0100.376.278.7
Date (yyyy/dd)1966/ 091986/ 151994/ 111986/ 111985/ 241973/ 171958/ 201971/ 051990/ 251953/ 061981/ 261966/ 20
Extreme Snow Depth (cm)143162168102338000193653
Date (yyyy/dd)1995/ 281987/ 161987/ 141964/ 011961/ 011975/ 111961/ 011961/ 011961/ 011991/ 291972/ 251978/ 14
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 °C1916.512.92.90.1300000311.966.2D
> 0 °C1211.718.127.130.930313130312719.1299D
> 10 °C0.470.6015.417.524.930.530.92816.45.91162.7D
> 20 °C0000.271.66.516.415.94.50.330045.5D
> 30 °C00000000.0600000.06D
> 35 °C0000000000000D
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 °C10.802.58.522.529313129.825.712.53.4197.7D
<= 2 °C30.727.830.326.417.14.300.131.310.42329.7201.1D
<= 0 °C3027.428.521.58.51000.205.317.527.6167.5D
< -2 °C26.824.521.811.31.700001.38.720.9117.1D
< -10 °C10.212.56.40.270000000.334.334D
< -20 °C00.670.200000000000.87D
< - 30 °C0000000000000D
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 mm8.47.810.311.815.517.215.414.817.418.316.711.7165.2D
>= 5 mm5.14.36.35.75.56.45.55.56.97.46.55.770.9D
>= 10 mm3.52.83.93.63.23.52.83.444.73.93.442.8D
>= 25 mm111.10.870.670.870.470.811.121.31.112.2D
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 cm14.312.3104.41.500000.404.811.659.2D
>= 5 cm5.24.93.310.4700000.131.13.619.6D
>= 10 cm2.31.91.60.400.2000000.070.471.78.6D
>= 25 cm0.130.270.0700000000.070.200.74D
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 mm19.917.31815.116.517.215.414.817.418.419.720.2209.9D
>= 5 mm9.48.496.76.16.45.55.56.97.57.38.987.6D
>= 10 mm5.95.15.54.33.53.52.83.444.84.75.352.8D
>= 25 mm1.41.61.410.670.870.470.811.121.51.514.3D
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 °C0000000000000D
Above 18 °C000001.315.216.72.100035.2D
Above 15 °C0000.1111.153.957.612.21.200137D
Above 10 °C00.102.617.265.7172.8181.980.218.92.80542.1D
Above 5 °C0.91.31.717.383.5182.9325.5336.221790.7232.51282.4D
Above 0 °C10.510.624.883.7214.3331.9480.5491.2367229.899.527.12,371D
Below 0 °C148.7152.897.315.70.500000.215.383.1513.6D
Below 5 °C294.2284.5229.199.324.7100016.188.8213.51251.1D
Below 10 °C448.2424.3382.4234.6113.433.92.20.713.299.3218.6365.92336.7D
Below 15 °C603.2565.2537.4382.1252.2129.238.331.495.2236.6365.8520.93757.6D
Below 18 °C696.2649.8630.4472344.2209.592.683.5175328.4455.8613.94751.4D
Soil Temperature
1981 to 2010 Canadian Climate Normals station data
Soil Temperature
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
at 5 cm depth (AM obs) (°C)0.1-0.10.21.86.810.914.715.412.78.94.71.56.5D
at 5 cm depth (PM obs) (°C)0.2-0.00.32.78.713.117.117.514.39.75.11.67.5D
at 10 cm depth (AM obs) (°C)0.70.30.41.96.910.814.515.513.29.65.52.26.8D
at 10 cm depth (PM obs) (°C)0.70.30.42.17.211.014.915.813.39.65.52.36.9D
at 20 cm depth (AM obs) (°C)1.50.90.92.06.410.013.515.013.310.26.43.26.9D
at 20 cm depth (PM obs) (°C)1.50.90.92.16.410.013.614.913.210.16.33.26.9D
at 50 cm depth (AM obs) (°C)1.91.21.12.06.09.613.014.513.110.36.73.66.9D
at 100 cm depth (AM obs) (°C)3.22.42.02.35.08.011.012.912.510.77.95.16.9D
at 150 cm depth (AM obs) (°C)4.03.02.52.54.67.29.911.811.910.68.35.86.9D
at 300 cm depth (AM obs) (°C)0.00.00.00.00.00.00.00.00.00.00.00.00.0
Evaporation
1981 to 2010 Canadian Climate Normals station data
Evaporation
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Lake Evaporation (mm)00002.23.13.532.21.4000
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 Daily9.310.410.613.814.715.114.814.112.510.39.17.8
Date (yyyy/dd)1973/ 311959/ 281976/ 031976/ 301978/ 231984/ 261982/ 021972/ 061955/ 051977/ 111951/ 071975/ 01
Radiation
1981 to 2010 Canadian Climate Normals station data
Radiation
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Code
Extreme Global - RF1 (MJ/m2)11152229323332292317117
Date (yyyy/dd)1987/ 311972/ 261982/ 311988/ 291988/ 281988/ 201969/ 071995/ 031965/ 051978/ 011988/ 011988/ 30
Frost-Free
1981 to 2010 Canadian Climate Normals station data
Frost-Free
Date/Days Code
Average Date of Last Spring Frost Jun 01 D
Average Date of First Fall Frost Oct 11 D
Average Length of Frost-Free Period 131 Days D
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%
DateJun 23Jun 16Jun 12Jun 07May 30May 27May 19
Probability of first temperature in fall of 0 °C or lower on or before indicated dates10%25%33%50%66%75%90%
DateSep 07Sep 20Sep 27Oct 03Oct 12Oct 16Oct 21
Probability of frost-free period equal to or less than indicated period (Days)10%25%33%50%66%75%90%
Days89101106121130133142

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.

ST JOHN'S WEST CDA

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