Ottawa monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at Ottawa

    Ottawa average temperature chart
    Average monthly temperatures in Ottawa (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C -6.6 -4.7 1.4 10.4 18.1 23.3 25.9 24.3 19.4 12.5 4.4 -3.8
    °F 20.1 23.5 34.5 50.6 64.6 73.9 78.7 75.7 66.8 54.6 40 25.1

    Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

  • Average rainfall & rainy days

    The graph below shows the average rainfall and number of rainy days per month.

    Average monthly rainfall in Ottawa (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 59 58 62 65 73 83 88 86 80 71 84 82
    inches 2.3 2.3 2.4 2.6 2.9 3.3 3.5 3.4 3.2 2.8 3.3 3.2
    Rainy days 14 12 11 11 12 12 11 11 12 12 14 16
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in Ottawa

    Average daily sunshine Ottawa
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 3.7 5 5.5 6.7 7.9 9 9.7 8.3 6.2 4.8 3 2.8
  • Day / night temperatures

    The graph below shows the daily range of temperatures for each month.

    Maximum and minimum daily temperatures in Ottawa (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C -15.6 -14.5 -7.6 0.4 7 12.3 15 13.9 9.4 3.7 -2 -11.4
    Max °C -6.4 -4.5 1.6 10.6 18.4 23.6 26.2 24.6 19.6 12.8 4.6 -3.7
    Min °F 3.9 5.9 18.3 32.7 44.6 54.1 59 56.9 48.9 38.6 28.4 11.6
    Max °F 12.2 14.9 26.6 41.9 54.9 64.2 69.1 66.6 58.1 46.8 34.3 18.5
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Ottawa in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 3.5 2.5 2.2 2.9 5.6 11 16.1 18 16.1 12 8.1 5.1
    °F 38.2 36.5 35.9 37.2 42.1 51.7 61 64.4 60.9 53.5 46.6 41.1
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Ottawa (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 15 14 15 15 13 12 10 10 11 13 14 14
    mph 9 9 9 9 8 7 7 7 7 8 9 9

    A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

  • Relative humidity

    The graph below shows the average relative humidity.

    Average relative humidity in Ottawa
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    73% 70% 68% 63% 63% 68% 69% 73% 76% 74% 78% 78%
Ottawa

Other monthly averages

Ottawa weather stats

Ottawa weather statistics
Hottest month: July 25.9°C 78.6°F
Driest month: February 58mm 2.3ins
Sunniest month: July 9.7hrs
Coldest month: January -6.6°C 20.1°F
Wettest month: July 88mm 3.5ins
Warmest sea: August 18°C 64.4°F
Map showing location of Ottawa (45.41117, -75.69812)

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