Canadian Climate Normals 1981-2010 Station Data
Notices:
The Notice Inventory contains a record of all past and current Notices.
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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.
OTTAWA MACDONALD-CARTIER INT'L A * ONTARIO |
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Latitude: | 45°19'21.000" N | Longitude: | 75°40'09.000" W | Elevation: | 114.00 m |
Climate ID: | 6106000 | WMO ID: | 71628 | TC ID: | YOW |
* This station meets WMO standards for temperature and precipitation.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | Code | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Temperature: | ||||||||||||||
Daily Average (°C) | -10.3 | -8.1 | -2.3 | 6.3 | 13.3 | 18.5 | 21 | 19.8 | 15 | 8 | 1.5 | -6.2 | 6.4 | Legend AA |
Standard Deviation | 3.4 | 2.5 | 2.3 | 1.7 | 1.8 | 1.3 | 1.1 | 1.2 | 1.4 | 1.4 | 1.7 | 3 | 0.8 | Legend AA |
Daily Maximum (°C) | -5.8 | -3.4 | 2.5 | 11.6 | 19 | 24.1 | 26.5 | 25.3 | 20.4 | 12.7 | 5.4 | -2.3 | 11.3 | Legend AA |
Daily Minimum (°C) | -14.8 | -12.8 | -7 | 1 | 7.5 | 12.9 | 15.5 | 14.3 | 9.6 | 3.3 | -2.4 | -10.1 | 1.4 | Legend AA |
Extreme Maximum (°C) | 12.9 | 12.4 | 26.7 | 31.1 | 35.8 | 36.1 | 36.7 | 37.8 | 35.1 | 27.8 | 23.9 | 16.3 | Legend | |
Date (yyyy/dd) |
2005/ 13 | 2000/ 27 | 1946/ 29 | 1990/ 27 | 2010/ 26 | 1941/ 27 | 1955/ 21 | 1944/ 11 | 2002/ 09 | 1946/ 07 | 1938/ 06 | 1982/ 03 | ||
Extreme Minimum (°C) | -35.6 | -36.1 | -30.6 | -16.7 | -5.6 | -0.1 | 5 | 2.6 | -3 | -7.8 | -21.7 | -34.4 | Legend | |
Date (yyyy/dd) |
1957/ 15 | 1943/ 15 | 1950/ 03 | 1954/ 04 | 1966/ 07 | 1980/ 09 | 1946/ 15 | 1986/ 29 | 1980/ 29 | 1939/ 18 | 1940/ 29 | 1942/ 20 | ||
Precipitation: | ||||||||||||||
Rainfall (mm) | 25 | 18.7 | 31.1 | 63 | 80.1 | 92.8 | 91.9 | 85.5 | 90.1 | 82.2 | 64.5 | 33.5 | 758.2 | Legend AA |
Snowfall (cm) | 53.9 | 43.3 | 38.3 | 11.3 | 0.2 | 0 | 0 | 0 | 0 | 3.7 | 20.2 | 52.5 | 223.5 | Legend AA |
Precipitation (mm) | 65.4 | 54.3 | 64.4 | 74.5 | 80.3 | 92.8 | 91.9 | 85.5 | 90.1 | 86.1 | 81.9 | 76.4 | 943.4 | Legend AA |
Average Snow Depth (cm) | 24 | 28 | 20 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 13 | 7 | Legend AA |
Median Snow Depth (cm) | 24 | 27 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 13 | 7 | Legend AA |
Snow Depth at Month-end (cm) | 27 | 25 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 19 | 7 | Legend AA |
Extreme Daily Rainfall (mm) | 43.6 | 40.4 | 44.2 | 46.2 | 47.8 | 66.6 | 69.6 | 67 | 135.4 | 76 | 46.2 | 36.3 | Legend | |
Date (yyyy/dd) |
2010/ 25 | 1997/ 21 | 1980/ 21 | 2005/ 02 | 2008/ 31 | 1995/ 03 | 1967/ 09 | 2004/ 10 | 2004/ 09 | 1995/ 06 | 2000/ 26 | 1941/ 24 | ||
Extreme Daily Snowfall (cm) | 38.6 | 39.6 | 40.6 | 29.8 | 15 | 0 | 0 | 0 | 1.5 | 29.2 | 28.2 | 35.6 | Legend | |
Date (yyyy/dd) |
1966/ 30 | 1954/ 16 | 1947/ 02 | 1993/ 01 | 1963/ 10 | 1939/ 01 | 1939/ 01 | 1939/ 01 | 1946/ 30 | 1988/ 22 | 1987/ 25 | 2007/ 16 | ||
Extreme Daily Precipitation (mm) | 43.6 | 40.4 | 44.2 | 46.2 | 47.8 | 66.6 | 69.6 | 67 | 135.4 | 76 | 46.2 | 43.7 | Legend | |
Date (yyyy/dd) |
2010/ 25 | 1997/ 21 | 1980/ 21 | 2005/ 02 | 2008/ 31 | 1995/ 03 | 1967/ 09 | 2004/ 10 | 2004/ 09 | 1995/ 06 | 2000/ 26 | 1973/ 09 | ||
Extreme Snow Depth (cm) | 77 | 119 | 135 | 58 | 10 | 0 | 0 | 0 | 0 | 20 | 42 | 75 | Legend | |
Date (yyyy/dd) |
1979/ 26 | 1971/ 24 | 1993/ 14 | 1971/ 01 | 1963/ 11 | 1955/ 01 | 1955/ 01 | 1955/ 01 | 1955/ 01 | 1997/ 27 | 1995/ 29 | 2007/ 17 | ||
Days with Maximum Temperature: | ||||||||||||||
<= 0 °C | 23.7 | 19.5 | 10 | 0.70 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 18.6 | 77.5 | Legend AA |
> 0 °C | 7.3 | 8.7 | 21 | 29.3 | 31 | 30 | 31 | 31 | 30 | 31 | 25 | 12.4 | 287.7 | Legend AA |
> 10 °C | 0.17 | 0.13 | 3.5 | 17 | 29.9 | 30 | 31 | 31 | 29.6 | 20.6 | 6 | 0.60 | 199.5 | Legend AA |
> 20 °C | 0 | 0 | 0.17 | 3.3 | 12.7 | 24.2 | 29.6 | 28.2 | 15.2 | 3.1 | 0 | 0 | 116.4 | Legend AA |
> 30 °C | 0 | 0 | 0 | 0.10 | 0.70 | 2.9 | 4.8 | 3.6 | 0.87 | 0 | 0 | 0 | 13 | Legend AA |
> 35 °C | 0 | 0 | 0 | 0 | 0.03 | 0.03 | 0.13 | 0.17 | 0.03 | 0 | 0 | 0 | 0.39 | Legend AA |
Days with Minimum Temperature: | ||||||||||||||
> 0 °C | 0.93 | 1.1 | 4.5 | 17.4 | 30.3 | 30 | 31 | 31 | 29.7 | 23.7 | 9.4 | 1.4 | 210.4 | Legend AA |
<= 2 °C | 30.8 | 27.9 | 29.6 | 18.4 | 2.6 | 0 | 0 | 0 | 0.97 | 12.8 | 25.5 | 30.7 | 179.1 | Legend AA |
<= 0 °C | 30.1 | 27.1 | 26.5 | 12.6 | 0.67 | 0 | 0 | 0 | 0.30 | 7.3 | 20.6 | 29.6 | 154.9 | Legend AA |
< -2 °C | 29.1 | 25.9 | 22.6 | 6.6 | 0.07 | 0 | 0 | 0 | 0.03 | 2.8 | 14.5 | 26.8 | 128.5 | Legend AA |
< -10 °C | 22.7 | 19 | 9.2 | 0.37 | 0 | 0 | 0 | 0 | 0 | 0 | 1.9 | 14.7 | 67.9 | Legend AA |
< -20 °C | 8.6 | 4.2 | 0.76 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2.7 | 16.3 | Legend AA |
< - 30 °C | 0.40 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.07 | 0.47 | Legend AA |
Days with Rainfall: | ||||||||||||||
>= 0.2 mm | 4.4 | 3.9 | 6.7 | 10.9 | 13.4 | 13.2 | 11.9 | 11 | 12.3 | 13.7 | 11 | 6 | 118.4 | Legend AA |
>= 5 mm | 1.6 | 1.2 | 2.1 | 4 | 4.9 | 5.8 | 5.4 | 4.8 | 5.1 | 5 | 4.2 | 2.3 | 46.5 | Legend AA |
>= 10 mm | 0.87 | 0.57 | 1 | 2 | 2.7 | 2.9 | 3.1 | 2.8 | 3.2 | 2.7 | 2.1 | 1.2 | 25.2 | Legend AA |
>= 25 mm | 0.13 | 0.07 | 0.10 | 0.33 | 0.47 | 0.73 | 0.77 | 0.67 | 0.60 | 0.47 | 0.43 | 0.13 | 4.9 | Legend AA |
Days With Snowfall: | ||||||||||||||
>= 0.2 cm | 16.1 | 12.1 | 8.8 | 3.5 | 0.17 | 0 | 0 | 0 | 0 | 1.1 | 6.8 | 14.7 | 63.3 | Legend AA |
>= 5 cm | 3.9 | 2.9 | 2.6 | 0.60 | 0 | 0 | 0 | 0 | 0 | 0.20 | 1.2 | 3.7 | 15.1 | Legend AA |
>= 10 cm | 1 | 0.93 | 1.2 | 0.27 | 0 | 0 | 0 | 0 | 0 | 0.10 | 0.47 | 1.3 | 5.3 | Legend AA |
>= 25 cm | 0.03 | 0.10 | 0.10 | 0.03 | 0 | 0 | 0 | 0 | 0 | 0.03 | 0.07 | 0.03 | 0.39 | Legend AA |
Days with Precipitation: | ||||||||||||||
>= 0.2 mm | 16.6 | 13.1 | 12.7 | 12.4 | 13.4 | 13.2 | 11.9 | 11 | 12.3 | 14.3 | 15.2 | 17.4 | 163.6 | Legend AA |
>= 5 mm | 4.4 | 3.5 | 4.3 | 4.6 | 4.9 | 5.8 | 5.4 | 4.8 | 5.1 | 5.1 | 5.4 | 4.9 | 58.4 | Legend AA |
>= 10 mm | 1.6 | 1.6 | 2 | 2.3 | 2.7 | 2.9 | 3.1 | 2.8 | 3.2 | 2.9 | 2.6 | 2.2 | 30 | Legend AA |
>= 25 mm | 0.20 | 0.17 | 0.23 | 0.40 | 0.47 | 0.73 | 0.77 | 0.67 | 0.60 | 0.50 | 0.50 | 0.27 | 5.5 | Legend AA |
Days with Snow Depth: | ||||||||||||||
>= 1 cm | 30.4 | 27.8 | 23.7 | 4.3 | 0 | 0 | 0 | 0 | 0 | 0.53 | 6 | 24.5 | 117.3 | Legend AA |
>= 5 cm | 29 | 27.3 | 19.6 | 1.9 | 0 | 0 | 0 | 0 | 0 | 0.30 | 3.3 | 19.7 | 101.1 | Legend AA |
>= 10 cm | 25.4 | 25.6 | 15.6 | 1.2 | 0 | 0 | 0 | 0 | 0 | 0.07 | 1.6 | 15 | 84.4 | Legend AA |
>= 20 cm | 16 | 15.3 | 11.8 | 0.40 | 0 | 0 | 0 | 0 | 0 | 0.03 | 0.50 | 7.8 | 51.8 | Legend AA |
Wind: | ||||||||||||||
Speed (km/h) | 14.6 | 14.3 | 14.4 | 15 | 13.1 | 11.4 | 10.7 | 10.2 | 11.1 | 12.7 | 13.8 | 14.2 | 12.9 | Legend AA |
Most Frequent Direction | W | W | W | E | W | W | W | SW | S | W | W | W | W | Legend AA |
Maximum Hourly Speed (km/h) | 72 | 72 | 72 | 67 | 64 | 67 | 54 | 69 | 64 | 80 | 66 | 61 | Legend | |
Date (yyyy/dd) |
1962/ 07 | 1965/ 25 | 1956/ 11 | 1985/ 07 | 1964/ 09 | 1985/ 23 | 1986/ 29 | 1961/ 11 | 1955/ 10 | 1954/ 15 | 1963/ 30 | 1982/ 28 | ||
Direction of Maximum Hourly Speed | E | E | SW | SW | SW | W | NW | SW | SW | E | NW | SW | E | Legend |
Maximum Gust Speed (km/h) | 100 | 122 | 116 | 93 | 135 | 106 | 129 | 100 | 85 | 100 | 103 | 94 | Legend | |
Date (yyyy/dd) |
1996/ 27 | 1956/ 25 | 1964/ 05 | 1975/ 19 | 1959/ 11 | 1957/ 23 | 1962/ 09 | 1957/ 03 | 1955/ 10 | 1955/ 14 | 1956/ 16 | 1982/ 28 | ||
Direction of Maximum Gust | SW | W | SW | SW | SW | W | SW | SW | SW | E | SW | SW | SW | Legend |
Days with Winds >= 52 km/h | 0.9 | 0.8 | 0.9 | 0.7 | 0.5 | 0.5 | 0.4 | 0.3 | 0.1 | 0.5 | 1.1 | 1.2 | 7.9 | Legend AA |
Days with Winds >= 63 km/h | 0.2 | 0 | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0 | 0.1 | 0.2 | 0.1 | 1.5 | Legend AA |
Degree Days: | ||||||||||||||
Above 24 °C | 0 | 0 | 0 | 0 | 0.3 | 4.1 | 7.8 | 4.3 | 0.8 | 0 | 0 | 0 | 17.2 | Legend AA |
Above 18 °C | 0 | 0 | 0 | 1 | 11.2 | 53.5 | 100.3 | 75.3 | 17.6 | 0.6 | 0 | 0 | 259.7 | Legend AA |
Above 15 °C | 0 | 0 | 0 | 4 | 33 | 116.3 | 187.2 | 152 | 50.2 | 4 | 0 | 0 | 546.7 | Legend AA |
Above 10 °C | 0 | 0 | 0.9 | 21.9 | 118.2 | 255.7 | 341.9 | 304.2 | 156.6 | 29.3 | 1.9 | 0 | 1230.6 | Legend AA |
Above 5 °C | 0.5 | 0.3 | 9.4 | 80.5 | 257.9 | 405.5 | 496.9 | 459.2 | 300.8 | 109.7 | 19.8 | 1.3 | 2141.8 | Legend AA |
Above 0 °C | 5.6 | 7.3 | 47.2 | 195.9 | 412.2 | 555.5 | 651.9 | 614.2 | 450.6 | 248.6 | 83.8 | 12.5 | 3285.2 | Legend AA |
Below 0 °C | 325.6 | 236.2 | 114.4 | 7.2 | 0 | 0 | 0 | 0 | 0 | 0.4 | 39.6 | 204.6 | 928 | Legend AA |
Below 5 °C | 475.5 | 370.4 | 231.5 | 41.9 | 0.6 | 0 | 0 | 0 | 0.2 | 16.6 | 125.6 | 348.4 | 1610.8 | Legend AA |
Below 10 °C | 630.1 | 511.2 | 378 | 133.2 | 16 | 0.2 | 0 | 0 | 6 | 91.2 | 257.7 | 502.1 | 2525.7 | Legend AA |
Below 15 °C | 785.1 | 652.4 | 532.1 | 265.3 | 85.8 | 10.8 | 0.4 | 2.8 | 49.7 | 220.9 | 405.8 | 657.1 | 3668 | Legend AA |
Below 18 °C | 878.1 | 737.1 | 625.1 | 352.4 | 157 | 38 | 6.5 | 19.1 | 107 | 310.5 | 495.8 | 750.1 | 4476.7 | Legend AA |
Bright Sunshine: | ||||||||||||||
Extreme Daily | 9.3 | 10.4 | 11.8 | 13.6 | 14.8 | 15.3 | 15.4 | 14.1 | 12.5 | 10.9 | 9.8 | 8.7 | Legend | |
Date (yyyy/dd) |
1981/ 31 | 1980/ 28 | 1980/ 30 | 1980/ 21 | 1980/ 28 | 1978/ 30 | 1979/ 03 | 1978/ 05 | 1983/ 01 | 1982/ 04 | 1978/ 01 | 1980/ 04 | ||
Humidex: | ||||||||||||||
Extreme Humidex | 13.9 | 12.7 | 27.2 | 35.1 | 41.8 | 44 | 46 | 47 | 42.5 | 33.9 | 26.1 | 18.4 | Legend | |
Date (yyyy/dd) |
2005/ 13 | 1981/ 22 | 1998/ 30 | 2002/ 17 | 2010/ 26 | 1995/ 19 | 1955/ 01 | 2006/ 01 | 1953/ 04 | 2005/ 04 | 1961/ 03 | 1982/ 03 | ||
Days with Humidex >= 30 | 0 | 0 | 0 | 0.3 | 2 | 8.4 | 15.9 | 12.9 | 4 | 0.2 | 0 | 0 | 43.8 | Legend AA |
Days with Humidex >= 35 | 0 | 0 | 0 | 0 | 0.4 | 3.2 | 5.6 | 4 | 0.8 | 0 | 0 | 0 | 14 | Legend AA |
Days with Humidex >= 40 | 0 | 0 | 0 | 0 | 0 | 0.5 | 1.4 | 0.7 | 0 | 0 | 0 | 0 | 2.7 | Legend AA |
Wind Chill: | ||||||||||||||
Extreme Wind Chill | -47.8 | -47.6 | -42.7 | -26.3 | -10.9 | 0 | 0 | 0 | -6.4 | -13.3 | -29.5 | -44.6 | Legend | |
Date (yyyy/dd) |
1968/ 08 | 1967/ 12 | 2007/ 06 | 1982/ 07 | 1966/ 07 | 1953/ 01 | 1953/ 01 | 1953/ 01 | 1980/ 29 | 1966/ 30 | 1958/ 30 | 1980/ 25 | ||
Days with Wind Chill < -20 | 17.4 | 13.8 | 5.7 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 0.6 | 9.8 | 47.4 | Legend AA |
Days with Wind Chill < -30 | 6.8 | 2.9 | 0.6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1.8 | 12.1 | Legend AA |
Days with Wind Chill < -40 | 0.7 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.1 | 0.9 | Legend AA |
Humidity: | ||||||||||||||
Average Vapour Pressure (kPa) | 0.3 | 0.3 | 0.4 | 0.6 | 1 | 1.4 | 1.7 | 1.7 | 1.3 | 0.8 | 0.6 | 0.4 | 0.9 | Legend AA |
Average Relative Humidity - 0600LST (%) | 76.5 | 74.9 | 73.7 | 73.5 | 76.1 | 81.1 | 84.4 | 87.9 | 89.6 | 86.1 | 83.5 | 81.8 | 80.8 | Legend AA |
Average Relative Humidity - 1500LST (%) | 67.5 | 61.3 | 56.6 | 50.2 | 49.9 | 53.1 | 53.7 | 55 | 59.1 | 61.6 | 68.1 | 72.2 | 59 | Legend AA |
Pressure: | ||||||||||||||
Average Station Pressure (kPa) | 100.2 | 100.3 | 100.2 | 100 | 100.1 | 99.9 | 100 | 100.2 | 100.3 | 100.3 | 100.3 | 100.3 | 100.2 | Legend AA |
Average Sea Level Pressure (kPa) | 101.7 | 101.7 | 101.7 | 101.4 | 101.4 | 101.3 | 101.4 | 101.6 | 101.7 | 101.7 | 101.7 | 101.7 | 101.6 | Legend AA |
Visibility (hours with): | ||||||||||||||
< 1 km | 12.8 | 15.4 | 14.6 | 5.2 | 3.3 | 3.6 | 3.1 | 4.8 | 8.2 | 12 | 14.5 | 16.7 | 114.1 | Legend CC |
1 to 9 km | 141.8 | 108.6 | 101.2 | 71.2 | 56.8 | 64.7 | 63.2 | 76.8 | 78.1 | 77.1 | 109 | 144.4 | 1092.7 | Legend CC |
> 9 km | 589.4 | 553.6 | 628.2 | 643.7 | 683.9 | 651.7 | 677.8 | 662.5 | 633.6 | 654.9 | 596.5 | 582.9 | 7558.8 | Legend CC |
Cloud Amount (hours with): | ||||||||||||||
0 to 2 tenths | 189 | 199.2 | 235.4 | 179.7 | 185 | 178.1 | 201.5 | 211.6 | 223.4 | 193.9 | 138.3 | 156.9 | 2291.9 | Legend CC |
3 to 7 tenths | 96.8 | 102.7 | 119 | 128 | 167 | 195.1 | 228.1 | 214.1 | 168.2 | 139.1 | 108.2 | 99.2 | 1765.6 | Legend CC |
8 to 10 tenths | 458.3 | 375.7 | 389.6 | 412.3 | 392 | 346.8 | 314.5 | 318.3 | 328.4 | 411 | 473.5 | 488 | 4708.1 | Legend CC |
Frost-Free: | Code | ||||||
---|---|---|---|---|---|---|---|
Average Date of Last Spring Frost | April 30 | LegendAA | |||||
Average Date of First Fall Frost | October 07 | LegendAA | |||||
Average Length of Frost-Free Period | 159 Days | LegendAA | |||||
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 20 | May 13 | May 11 | May 07 | Apr 29 | Apr 27 | Apr 19 |
Probability of first temperature in fall of 0 °C or lower on or after indicated dates | 10% | 25% | 33% | 50% | 66% | 75% | 90% |
Date | Sep 24 | Sep 28 | Sep 29 | Oct 02 | Oct 06 | Oct 09 | Oct 15 |
Probability of frost-free period equal to or less than indicated period (Days) | 10% | 25% | 33% | 50% | 66% | 75% | 90% |
Days | 130 | 140 | 144 | 152 | 158 | 161 | 167 |
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
- Date modified: