St. John's monthly weather averages

  • Average daytime temperature

    The bar chart below shows the average monthly peak daytime temperatures at St. John's

    St. John's average temperature chart
    Average monthly temperatures in St. John's (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C -0.8 -1.4 0.9 4.7 10.2 15.7 20.1 19.3 15.5 10.6 6.2 1.4
    °F 30.6 29.4 33.7 40.4 50.3 60.3 68.2 66.8 59.8 51 43.1 34.6

    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 St. John's (mm and inches)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    mm 155 140 132 115 102 92 75 119 118 147 148 150
    inches 6.1 5.5 5.2 4.5 4 3.6 3 4.7 4.6 5.8 5.8 5.9
    Rainy days 20 17 18 16 16 14 13 14 15 18 18 20
  • Average daily sunshine

    The bar chart below shows the average daily sunshine hours in St. John's

    Average daily sunshine St. John's
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Hrs sunshine 2.8 3.5 3.8 4.3 5.6 6.5 7.7 6.6 5.1 3.8 2.7 2.3
  • Day / night temperatures

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

    Maximum and minimum daily temperatures in St. John's (degrees centigrade and fahrenheit)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    Min °C -7.8 -8.6 -5.7 -1.9 1.6 6.1 10.7 11.1 7.6 3.7 0.1 -4.8
    Max °C -0.6 -1.3 1.1 4.9 10.4 16 20.4 19.6 15.7 10.8 6.3 1.6
    Min °F 18 16.6 21.7 28.7 34.9 42.9 51.2 51.9 45.6 38.6 32.2 23.4
    Max °F 24.4 23.2 27.9 34.7 42.8 51.8 59.9 59.5 52.9 45 37.8 29.1
  • Sea temperature

    The graph below shows the average sea temperature.

    Average sea temperature around St. John's in degrees centigrade and fahrenheit
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    °C 1 0.3 0.3 0.9 2.8 6 10.8 14.2 12.9 9.4 5.9 2.9
    °F 33.9 32.5 32.5 33.7 37 42.7 51.5 57.5 55.2 48.9 42.6 37.2
  • Wind speed

    The graph below shows the average wind speed.

    Average wind speed in St. John's (mph and kmh)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    km/h 29 28 27 25 22 22 21 21 22 24 26 28
    mph 18 18 17 15 14 14 13 13 14 15 16 18

    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 St. John's
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
    82% 82% 82% 83% 82% 81% 82% 82% 82% 83% 83% 83%

Other monthly averages

St. John's weather stats

St. John's weather statistics
Hottest month: July 20.1°C 68.2°F
Driest month: July 75mm 3ins
Sunniest month: July 7.7hrs
Coldest month: February -1.4°C 29.5°F
Wettest month: January 155mm 6.1ins
Warmest sea: August 14.2°C 57.6°F
Map showing location of St. John's (47.56494, -52.70931)

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