Dedham (MA) monthly weather averages

Contents

Average daytime temperature

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

Dedham average temperature chart (Celsius) Dedham average temperature chart (Fahrenheit)
Average monthly temperatures in Dedham (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1.2 2.5 7.5 13.5 19.6 24.6 27.7 26.6 22.5 16.8 10.5 3.9
°F 34.1 36.5 45.5 56.4 67.3 76.3 81.9 80 72.5 62.2 51 39.1

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.

Dedham monthly rainfall chart (mm) Dedham monthly rainfall chart (inches)
Average monthly rainfall in Dedham (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 98 94 102 94 86 78 77 95 88 91 114 109
inches 3.9 3.7 4 3.7 3.4 3.1 3 3.7 3.5 3.6 4.5 4.3
Rainy days 11 10 11 11 11 11 9 10 9 9 11 12

Average annual rainfall in Dedham: 1095.267mm (431.2 inches)

Average daily sunshine

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

Dedham average daily sunshine chart
Average daily sunshine Dedham
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.3 7 7.7 8.8 9.8 9.9 9.2 8.2 7.1 5.2 5.1

Day / night temperatures

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

Dedham average minimum / maximum temperatures (Celsius) Dedham average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Dedham (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7.8 -6.7 -2 3.2 8.5 13.5 17 16.3 11.9 6.2 1.7 -4.6
Max °C 1.4 2.7 7.8 13.8 19.9 24.9 28 26.9 22.8 17.1 10.8 4.2
Min °F 18 19.9 28.5 37.8 47.3 56.3 62.6 61.3 53.3 43.1 35 23.8
Max °F 26.2 28.4 37.2 47.3 57.6 66.6 72.5 70.9 63.1 52.9 43.2 31.6

Sea temperature

The graph below shows the average sea temperature.

Dedham average sea temperature chart (Celsius) Dedham average sea temperature chart (Fahrenheit)
Average sea temperature around Dedham 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.

Dedham average winspeed by month (km/h) Dedham average winspeed by month (mph)
Average wind speed in Dedham (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 19 19 19 19 17 16 15 14 15 16 17 18
mph 12 12 12 12 11 10 9 9 9 10 11 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.

Dedham relative humidity averages
Average relative humidity in Dedham
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
63% 63% 62% 61% 66% 69% 69% 72% 73% 70% 68% 66%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Dedham weather stats

Dedham weather statistics
Hottest month: July 27.7°C 81.9°F
Driest month: July 77mm 3ins
Sunniest month: July 9.9hrs
Coldest month: January 1.2°C 34.2°F
Wettest month: November 114mm 4.5ins
Warmest sea: August 19.8°C 67.6°F
Map showing location of Dedham (42.24177, -71.16616) Dedham map pin © Google

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