Oshawa monthly weather averages

  • Average daytime temperature

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

    Oshawa average temperature chart
    Average monthly temperatures in Oshawa (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C -3 -1.9 3.6 10.7 17.6 22.5 25.6 24.4 19.9 13 6.5 -0.1
    °F 26.7 28.6 38.5 51.3 63.7 72.5 78.1 76 67.8 55.5 43.8 31.9

    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 Oshawa (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 52 48 56 65 70 76 69 83 81 72 82 75
    inches 2.1 1.9 2.2 2.6 2.8 3 2.7 3.3 3.2 2.8 3.2 2.9
    Rainy days 11 9 10 11 12 10 9 11 11 12 12 12
  • Average daily sunshine

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

    Average daily sunshine Oshawa
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 3.2 4.2 5.1 6.5 7.9 9.1 9.8 8.5 6.2 4.9 2.9 2.4
  • Day / night temperatures

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

    Maximum and minimum daily temperatures in Oshawa (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C -11.3 -10.1 -4.8 1.1 6.9 11.5 14.8 14.1 10.1 4.2 -0.3 -7.3
    Max °C -2.8 -1.7 3.8 11 17.9 22.8 25.9 24.7 20.2 13.3 6.7 0.1
    Min °F 11.8 13.8 23.4 33.9 44.4 52.6 58.6 57.4 50.1 39.5 31.5 18.9
    Max °F 19.4 21.4 31.1 42.8 54.3 62.8 68.5 66.9 59.2 47.7 37.8 25.5
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around Oshawa in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 3.4 2.4 2.3 3.3 6.6 13.6 19.8 21.6 19.3 14.1 9.2 5.3
    °F 38.1 36.4 36.1 37.9 43.9 56.4 67.7 70.8 66.7 57.4 48.6 41.6
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in Oshawa (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 20 19 18 18 15 13 13 12 13 15 18 18
    mph 12 12 11 11 9 8 8 8 8 9 11 11

    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 Oshawa
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    79% 78% 75% 69% 68% 70% 71% 74% 77% 77% 80% 81%

Other monthly averages

Oshawa weather stats

Oshawa weather statistics
Hottest month: July 25.6°C 78.1°F
Driest month: February 48mm 1.9ins
Sunniest month: July 9.8hrs
Coldest month: January -3°C 26.6°F
Wettest month: August 83mm 3.3ins
Warmest sea: August 21.6°C 70.9°F
Map showing location of Oshawa (43.90012, -78.84957)

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