Harwich Port (MA) monthly weather averages

Average daytime temperature

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

Harwich Port average temperature chart (Celsius) Harwich Port average temperature chart (Fahrenheit)
Average monthly temperatures in Harwich Port (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.5 2.6 5.9 10.7 16.2 21.5 24.8 24.2 20.8 16.1 10.5 5.3
°F 36.4 36.7 42.7 51.3 61.2 70.7 76.6 75.6 69.5 61 50.9 41.6

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.

Harwich Port monthly rainfall chart (mm) Harwich Port monthly rainfall chart (inches)
Average monthly rainfall in Harwich Port (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 101 91 102 95 83 67 65 93 85 89 113 113
inches 4 3.6 4 3.7 3.2 2.7 2.6 3.7 3.3 3.5 4.4 4.4
Rainy days 12 11 12 11 11 11 9 10 8 9 11 13

Average annual rainfall in Harwich Port: 1068.667mm (420.7 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Harwich Port

Harwich Port average daily sunshine chart
Average daily sunshine Harwich Port
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.5 7.3 7.9 8.6 9.3 9.1 8.7 8.1 7.3 5.4 5.1

Day / night temperatures

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

Harwich Port average minimum / maximum temperatures (Celsius) Harwich Port average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Harwich Port (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -5.3 -5 -0.5 3.3 8.4 13.7 17.3 17 13.6 8.7 4.2 -2.3
Max °C 2.7 2.8 6.1 10.9 16.4 21.7 25 24.4 21 16.3 10.7 5.5
Min °F 22.6 23 31.1 37.9 47.1 56.7 63.1 62.6 56.5 47.7 39.5 27.9
Max °F 29.7 30 37 44.8 54.3 63.9 70 69.3 63.1 54.5 45.3 34.9

Sea temperature

The graph below shows the average sea temperature.

Harwich Port average sea temperature chart (Celsius) Harwich Port average sea temperature chart (Fahrenheit)
Average sea temperature around Harwich Port 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.

Harwich Port average winspeed by month (km/h) Harwich Port average winspeed by month (mph)
Average wind speed in Harwich Port (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 9 9 9 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.

Harwich Port relative humidity averages
Average relative humidity in Harwich Port
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
66% 65% 66% 66% 71% 73% 74% 75% 75% 72% 70% 68%