Dorchester monthly weather averages

Average daytime temperature

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

Dorchester average temperature chart (Celsius) Dorchester average temperature chart (Fahrenheit)
Average monthly temperatures in Dorchester (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.2 7.1 9.2 11.7 14.8 17.9 19.9 19.7 17.5 14.3 10.2 8.3
°F 45 44.8 48.6 53 58.6 64.1 67.9 67.5 63.5 57.8 50.4 47

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.

Dorchester monthly rainfall chart (mm) Dorchester monthly rainfall chart (inches)
Average monthly rainfall in Dorchester (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 95 73 75 53 61 55 53 66 73 85 91 100
inches 3.8 2.9 2.9 2.1 2.4 2.2 2.1 2.6 2.9 3.3 3.6 3.9
Rainy days 18 14 16 13 14 12 11 12 13 16 16 18

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Dorchester

Dorchester average daily sunshine chart
Average daily sunshine Dorchester
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 2.1 3 4.3 6.2 7.4 7.7 7.7 7 5.6 3.8 2.9 2

Day / night temperatures

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

Dorchester average minimum / maximum temperatures (Celsius) Dorchester average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Dorchester (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 1.9 1.6 2.9 4 6.8 9.8 11.7 11.7 10.1 7.9 4.3 2.8
Max °C 7.4 7.3 9.4 11.9 15 18.1 20.2 19.9 17.7 14.5 10.4 8.5
Min °F 35.3 34.8 37.1 39.1 44.2 49.6 53 53.1 50.2 46.2 39.7 37
Max °F 40.3 39.9 43 46.2 51.6 57 60.6 60.4 57 52.2 45.1 42.1

Sea temperature

The graph below shows the average sea temperature.

Dorchester average sea temperature chart (Celsius) Dorchester average sea temperature chart (Fahrenheit)
Average sea temperature around Dorchester in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 10.1 9.2 9.1 9.9 11.4 13.4 15.4 16.6 16.5 15.3 13.5 11.7
°F 50.2 48.5 48.4 49.8 52.5 56.1 59.8 61.9 61.7 59.6 56.4 53

Wind speed

The graph below shows the average wind speed.

Dorchester average winspeed by month (km/h) Dorchester average winspeed by month (mph)
Average wind speed in Dorchester (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 18 18 18 17 16 15 14 14 14 15 17 18
mph 11 11 11 11 10 9 9 9 9 9 10 11

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.

Dorchester relative humidity averages
Average relative humidity in Dorchester
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
92% 89% 85% 82% 82% 81% 81% 83% 86% 89% 90% 92%

Other monthly averages

UV index Best time to go?

Dorchester weather stats

Dorchester weather statistics
Hottest month: July 19.9°C 67.8°F
Driest month: April 53mm 2.1ins
Sunniest month: July 7.7hrs
Coldest month: February 7.1°C 44.8°F
Wettest month: December 100mm 3.9ins
Warmest sea: August 16.6°C 61.9°F
Map showing location of Dorchester (50.71667, -2.43333)

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