Nantucket (MA) monthly weather averages

Contents

Average daytime temperature

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

Nantucket average temperature chart (Celsius) Nantucket average temperature chart (Fahrenheit)
Average monthly temperatures in Nantucket (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 3.2 3.1 6.4 10.9 16 21.1 24.3 24.1 20.9 16.5 11 5.9
°F 37.7 37.6 43.4 51.6 60.8 69.9 75.8 75.4 69.6 61.7 51.9 42.6

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.

Nantucket monthly rainfall chart (mm) Nantucket monthly rainfall chart (inches)
Average monthly rainfall in Nantucket (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 101 92 99 90 81 58 66 87 86 84 103 114
inches 4 3.6 3.9 3.5 3.2 2.3 2.6 3.4 3.4 3.3 4.1 4.5
Rainy days 12 11 12 11 11 11 9 10 8 9 11 13

Average annual rainfall in Nantucket: 1030.367mm (405.7 inches)

Average daily sunshine

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

Nantucket average daily sunshine chart
Average daily sunshine Nantucket
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 5.7 6.6 7.5 8.1 8.7 9.3 8.9 8.6 8.1 7.4 5.5 5.1

Day / night temperatures

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

Nantucket average minimum / maximum temperatures (Celsius) Nantucket average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Nantucket (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -4 -3.7 0.3 4 8.9 14 17.7 17.6 14.4 9.6 4.8 -1.3
Max °C 3.4 3.3 6.5 11.1 16.2 21.3 24.5 24.3 21.1 16.7 11.2 6.1
Min °F 24.9 25.3 32.5 39.1 47.9 57.1 63.9 63.6 57.8 49.2 40.6 29.8
Max °F 31.5 31.6 38.1 45.5 54.5 63.7 70 69.6 63.9 55.6 46.4 36.3

Sea temperature

The graph below shows the average sea temperature.

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

Nantucket average winspeed by month (km/h) Nantucket average winspeed by month (mph)
Average wind speed in Nantucket (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 20 20 21 20 18 17 16 15 16 17 18 19
mph 12 13 13 13 11 10 10 9 10 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.

Nantucket relative humidity averages
Average relative humidity in Nantucket
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
67% 66% 66% 66% 72% 74% 75% 76% 76% 73% 70% 68%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Nantucket weather stats

Nantucket weather statistics
Hottest month: July 24.3°C 75.7°F
Driest month: June 58mm 2.3ins
Sunniest month: October 7.4hrs
Coldest month: January 3.2°C 37.8°F
Wettest month: December 114mm 4.5ins
Warmest sea: August 20.3°C 68.5°F
Map showing location of Nantucket (41.28346, -70.09946) Nantucket map pin © Google

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