Saint Johnsbury (VT) monthly weather averages

Average daytime temperature

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

Saint Johnsbury average temperature chart (Celsius) Saint Johnsbury average temperature chart (Fahrenheit)
Average monthly temperatures in Saint Johnsbury (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -3.9 -1.9 4 11.3 19.2 23.7 26.1 24.6 20 13.5 5.5 -1.7
°F 25 28.5 39.1 52.3 66.6 74.7 79 76.3 68.1 56.3 41.9 28.9

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.

Saint Johnsbury monthly rainfall chart (mm) Saint Johnsbury monthly rainfall chart (inches)
Average monthly rainfall in Saint Johnsbury (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 64 60 69 75 89 102 97 108 85 83 93 87
inches 2.5 2.4 2.7 2.9 3.5 4 3.8 4.2 3.3 3.3 3.7 3.4
Rainy days 14 11 13 13 13 13 13 13 11 13 15 15

Average annual rainfall in Saint Johnsbury: 983.334mm (387.1 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Saint Johnsbury

Saint Johnsbury average daily sunshine chart
Average daily sunshine Saint Johnsbury
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4 5.1 5.6 6.6 8 8.7 9.3 8.1 6.6 5.2 3.3 3.1

Day / night temperatures

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

Saint Johnsbury average minimum / maximum temperatures (Celsius) Saint Johnsbury average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Saint Johnsbury (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -15.2 -14.2 -7.7 -1.2 5.1 10.2 13 11.9 7.7 1.8 -3.1 -11.3
Max °C -3.6 -1.7 4.3 11.6 19.6 24.1 26.5 24.9 20.4 13.8 5.7 -1.5
Min °F 4.6 6.5 18.2 29.8 41.1 50.3 55.3 53.4 45.8 35.2 26.4 11.7
Max °F 15.1 17.8 28.9 41.4 54.1 62.8 67.5 65.1 57.2 46 34.3 20.5

Sea temperature

The graph below shows the average sea temperature.

Saint Johnsbury average sea temperature chart (Celsius) Saint Johnsbury average sea temperature chart (Fahrenheit)
Average sea temperature around Saint Johnsbury in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.5 3.3 2.9 3.9 7 11.8 16.2 17.5 15.6 12.1 8.9 6.2
°F 40 37.9 37.2 39.1 44.6 53.2 61.1 63.5 60.1 53.8 48 43.2

Wind speed

The graph below shows the average wind speed.

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

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 Johnsbury relative humidity averages
Average relative humidity in Saint Johnsbury
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
71% 69% 67% 63% 65% 72% 74% 77% 78% 74% 77% 76%