Wellesley (MA) monthly weather averages

Contents

Average daytime temperature

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

Wellesley average temperature chart (Celsius) Wellesley average temperature chart (Fahrenheit)
Average monthly temperatures in Wellesley (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.9 2.2 7.5 13.8 20.1 24.9 27.9 26.8 22.5 16.8 10.3 3.4
°F 33.6 36 45.4 56.8 68.2 76.8 82.3 80.2 72.4 62.2 50.5 38.1

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.

Wellesley monthly rainfall chart (mm) Wellesley monthly rainfall chart (inches)
Average monthly rainfall in Wellesley (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 98 92 103 96 89 81 84 97 91 92 118 111
inches 3.9 3.6 4.1 3.8 3.5 3.2 3.3 3.8 3.6 3.6 4.6 4.4
Rainy days 11 10 11 11 11 11 9 10 9 9 11 12

Average annual rainfall in Wellesley: 1123.5mm (442.3 inches)

Average daily sunshine

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

Wellesley average daily sunshine chart
Average daily sunshine Wellesley
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.3 7 7.7 8.7 9.7 9.9 9.2 8.1 7 5.2 5.1

Day / night temperatures

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

Wellesley average minimum / maximum temperatures (Celsius) Wellesley average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Wellesley (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -9 -7.9 -2.7 2.6 8 13 16.4 15.6 10.9 5 0.5 -5.8
Max °C 1.2 2.5 7.7 14.1 20.4 25.2 28.2 27.1 22.8 17.1 10.5 3.6
Min °F 15.9 17.9 27.1 36.6 46.4 55.4 61.5 60 51.5 40.9 32.9 21.6
Max °F 25 27.1 36.5 46.9 57.6 66.4 72.1 70.3 62.2 51.8 41.9 30

Sea temperature

The graph below shows the average sea temperature.

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

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

Wellesley relative humidity averages
Average relative humidity in Wellesley
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 63% 62% 61% 66% 69% 69% 72% 73% 70% 69% 67%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Wellesley weather stats

Wellesley weather statistics
Hottest month: July 27.9°C 82.2°F
Driest month: June 81mm 3.2ins
Sunniest month: July 9.9hrs
Coldest month: January 0.9°C 33.6°F
Wettest month: November 118mm 4.6ins
Warmest sea: August 19.8°C 67.6°F
Map showing location of Wellesley (42.29649, -71.29256) Wellesley map pin © Google

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