West Dennis (MA) monthly weather averages

Average daytime temperature

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

West Dennis average temperature chart (Celsius) West Dennis average temperature chart (Fahrenheit)
Average monthly temperatures in West Dennis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.4 2.6 6.2 11.1 16.7 22 25.2 24.6 21 16.3 10.6 5
°F 36.3 36.7 43.2 52.1 62.1 71.6 77.3 76.2 69.9 61.4 51 41.1

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.

West Dennis monthly rainfall chart (mm) West Dennis monthly rainfall chart (inches)
Average monthly rainfall in West Dennis (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 100 96 107 100 87 68 69 100 88 91 117 114
inches 3.9 3.8 4.2 3.9 3.4 2.7 2.7 3.9 3.5 3.6 4.6 4.5
Rainy days 12 10 12 11 11 11 9 10 8 9 11 13

Average annual rainfall in West Dennis: 1107.6915mm (436.1 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in West Dennis

West Dennis average daily sunshine chart
Average daily sunshine West Dennis
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.8 6.5 7.4 8 8.7 9.4 9.2 8.8 8.2 7.3 5.4 5.1

Day / night temperatures

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

West Dennis average minimum / maximum temperatures (Celsius) West Dennis average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in West Dennis (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -5.7 -5.4 -0.9 3.1 8.2 13.6 17.3 16.9 13.2 8.2 3.6 -2.8
Max °C 2.6 2.8 6.4 11.3 16.9 22.2 25.4 24.8 21.2 16.5 10.7 5.2
Min °F 21.8 22.3 30.4 37.6 46.8 56.5 63.1 62.4 55.8 46.8 38.4 27
Max °F 29.2 29.7 37 45 54.6 64.2 70.3 69.5 63 54.3 44.9 34.2

Sea temperature

The graph below shows the average sea temperature.

West Dennis average sea temperature chart (Celsius) West Dennis average sea temperature chart (Fahrenheit)
Average sea temperature around West Dennis in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.8 4.1 3.9 5.5 9.2 14.1 18.8 20.3 18.4 14.8 11.2 8.3
°F 42.4 39.4 39 41.9 48.6 57.4 65.8 68.6 65.2 58.7 52.1 46.9

Wind speed

The graph below shows the average wind speed.

West Dennis average winspeed by month (km/h) West Dennis average winspeed by month (mph)
Average wind speed in West Dennis (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 20 20 20 18 16 15 15 15 16 18 19
mph 12 12 13 12 11 10 10 9 10 10 11 12

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.

West Dennis relative humidity averages
Average relative humidity in West Dennis
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
66% 65% 65% 65% 70% 73% 73% 75% 75% 72% 70% 67%