Saint John’s monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Saint John’s

Saint John’s average temperature chart (Celsius) Saint John’s average temperature chart (Fahrenheit)
Average monthly temperatures in Saint John’s (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 28 28 28.4 29.1 29.7 30.3 30.8 30.8 30.5 30.3 29.5 28.5
°F 82.3 82.5 83.2 84.4 85.4 86.5 87.4 87.4 86.9 86.5 85 83.2

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.

Saint John’s monthly rainfall chart (mm) Saint John’s monthly rainfall chart (inches)
Average monthly rainfall in Saint John’s (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 67 37 40 57 91 70 79 124 140 134 113 88
inches 2.6 1.4 1.6 2.2 3.6 2.7 3.1 4.9 5.5 5.3 4.4 3.5
Rainy days 16 13 13 13 14 12 16 18 16 20 19 18

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Saint John’s

Saint John’s average daily sunshine chart
Average daily sunshine Saint John’s
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 8 8 8.4 8.5 8.1 8.3 8.7 8.5 7.9 7.6 7.6 7.5

Day / night temperatures

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

Saint John’s average minimum / maximum temperatures (Celsius) Saint John’s average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Saint John’s (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 21.9 21.8 22.2 23 24 25 25.1 25.1 24.6 24.2 23.4 22.6
Max °C 28.1 28.2 28.6 29.3 29.8 30.4 30.9 30.9 30.7 30.4 29.6 28.6
Min °F 71.4 71.2 72 73.3 75.2 77 77.2 77.2 76.2 75.6 74.1 72.7
Max °F 77 77 77.7 79 80.4 81.9 82.4 82.4 81.7 81.1 79.7 78.1

Sea temperature

The graph below shows the average sea temperature.

Saint John’s average sea temperature chart (Celsius) Saint John’s average sea temperature chart (Fahrenheit)
Average sea temperature around Saint John’s in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 26.5 26.1 26.1 26.7 27.5 28 28.2 28.5 28.8 28.7 28.2 27.3
°F 79.7 79 79 80.1 81.4 82.4 82.7 83.4 83.9 83.7 82.7 81.1

Wind speed

The graph below shows the average wind speed.

Saint John’s average winspeed by month (km/h) Saint John’s average winspeed by month (mph)
Average wind speed in Saint John’s (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 22 22 22 21 21 23 25 22 18 17 18 21
mph 14 14 14 13 13 14 15 14 11 10 11 13

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.

Saint John’s relative humidity averages
Average relative humidity in Saint John’s
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
77% 76% 76% 77% 78% 78% 80% 79% 80% 81% 81% 79%

Other monthly averages

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Saint John’s weather stats

Saint John’s weather statistics
Hottest month: July 30.8°C 87.4°F
Driest month: February 37mm 1.5ins
Sunniest month: January 8hrs
Coldest month: January 28°C 82.4°F
Wettest month: September 140mm 5.5ins
Warmest sea: September 28.8°C 83.8°F
Map showing location of Saint John’s (17.11667, -61.85)

Locations nearby

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