Chelmsford (MA) monthly weather averages

Contents

Average daytime temperature

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

Chelmsford average temperature chart (Celsius) Chelmsford average temperature chart (Fahrenheit)
Average monthly temperatures in Chelmsford (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.4 1.8 7 13.6 20.1 25 27.8 26.6 22.3 16.6 9.9 2.7
°F 32.8 35.3 44.6 56.5 68.2 77 82 79.9 72.1 61.9 49.7 36.9

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.

Chelmsford monthly rainfall chart (mm) Chelmsford monthly rainfall chart (inches)
Average monthly rainfall in Chelmsford (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 92 87 97 98 91 88 88 91 89 95 116 103
inches 3.6 3.4 3.8 3.9 3.6 3.4 3.4 3.6 3.5 3.7 4.6 4.1
Rainy days 11 10 11 11 12 11 9 10 9 9 11 12

Average annual rainfall in Chelmsford: 1104.966mm (435 inches)

Average daily sunshine

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

Chelmsford average daily sunshine chart
Average daily sunshine Chelmsford
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.8 6.5 7.2 7.8 8.8 9.8 10.1 9.2 8.1 6.9 5 5

Day / night temperatures

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

Chelmsford average minimum / maximum temperatures (Celsius) Chelmsford average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Chelmsford (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -10.3 -9.3 -3.7 1.7 7.4 12.7 15.8 14.7 10.1 4.1 -0.3 -7
Max °C 0.7 2.1 7.3 13.9 20.4 25.3 28.1 26.9 22.6 16.9 10.1 3
Min °F 13.5 15.3 25.4 35.1 45.3 54.9 60.4 58.5 50.1 39.4 31.5 19.5
Max °F 23.4 25.5 35.2 46 57 66.2 71.4 69.4 61.3 50.9 40.8 28.4

Sea temperature

The graph below shows the average sea temperature.

Chelmsford average sea temperature chart (Celsius) Chelmsford average sea temperature chart (Fahrenheit)
Average sea temperature around Chelmsford in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 5.4 3.8 3.5 5.2 9.1 14 18.6 19.8 17.8 14.2 10.7 7.9
°F 41.8 38.8 38.3 41.4 48.4 57.3 65.4 67.7 64.1 57.6 51.3 46.2

Wind speed

The graph below shows the average wind speed.

Chelmsford average winspeed by month (km/h) Chelmsford average winspeed by month (mph)
Average wind speed in Chelmsford (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 17 18 17 16 14 13 13 13 14 16 16
mph 10 11 11 11 10 9 8 8 8 9 10 10

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.

Chelmsford relative humidity averages
Average relative humidity in Chelmsford
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 64% 63% 61% 65% 69% 70% 73% 74% 70% 70% 68%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Chelmsford weather stats

Chelmsford weather statistics
Hottest month: July 27.8°C 82°F
Driest month: February 87mm 3.4ins
Sunniest month: July 10.1hrs
Coldest month: January 0.4°C 32.7°F
Wettest month: November 116mm 4.6ins
Warmest sea: August 19.8°C 67.6°F
Map showing location of Chelmsford (42.59981, -71.36728) Chelmsford map pin © Google

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