Onset (MA) monthly weather averages

Contents

Average daytime temperature

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

Onset average temperature chart (Celsius) Onset average temperature chart (Fahrenheit)
Average monthly temperatures in Onset (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.2 2.8 6.9 12 17.8 23.1 26.1 25.4 21.5 16.6 10.7 4.7
°F 36 37 44.4 53.6 64.1 73.5 78.9 77.7 70.8 61.9 51.3 40.5

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.

Onset monthly rainfall chart (mm) Onset monthly rainfall chart (inches)
Average monthly rainfall in Onset (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 102 102 112 109 95 75 76 110 93 93 123 116
inches 4 4 4.4 4.3 3.7 2.9 3 4.3 3.6 3.7 4.9 4.6
Rainy days 12 10 12 11 11 11 9 10 8 9 11 13

Average annual rainfall in Onset: 1174.867mm (462.5 inches)

Average daily sunshine

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

Onset average daily sunshine chart
Average daily sunshine Onset
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.8 6.6 7.4 8 8.8 9.5 9.4 8.8 8.2 7.3 5.4 5.1

Day / night temperatures

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

Onset average minimum / maximum temperatures (Celsius) Onset average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Onset (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -6.7 -6.2 -1.5 2.8 8 13.5 17.1 16.6 12.5 7.2 2.5 -3.8
Max °C 2.5 3 7.1 12.3 18.1 23.3 26.3 25.6 21.8 16.9 11 5
Min °F 20 20.8 29.3 37 46.3 56.3 62.8 61.9 54.4 44.9 36.4 25.3
Max °F 28.2 29.1 37 45.5 55.4 65.1 71.1 70 62.8 53.6 44.1 33.1

Sea temperature

The graph below shows the average sea temperature.

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

Onset average winspeed by month (km/h) Onset average winspeed by month (mph)
Average wind speed in Onset (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.

Onset relative humidity averages
Average relative humidity in Onset
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 64% 64% 64% 69% 72% 72% 74% 74% 71% 69% 67%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Onset weather stats

Onset weather statistics
Hottest month: July 26.1°C 79°F
Driest month: June 75mm 3ins
Sunniest month: September 8.2hrs
Coldest month: January 2.2°C 36°F
Wettest month: November 123mm 4.8ins
Warmest sea: August 20.3°C 68.5°F
Map showing location of Onset (41.74177, -70.65781) Onset map pin © Google

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