Deer Isle (ME) monthly weather averages

Contents

Average daytime temperature

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

Deer Isle average temperature chart (Celsius) Deer Isle average temperature chart (Fahrenheit)
Average monthly temperatures in Deer Isle (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C -1.6 -0.4 4.8 11.2 17.6 22.6 25.7 24.7 20.3 14.5 8.1 1.1
°F 29.2 31.3 40.6 52.1 63.7 72.7 78.3 76.5 68.6 58.1 46.6 33.9

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.

Deer Isle monthly rainfall chart (mm) Deer Isle monthly rainfall chart (inches)
Average monthly rainfall in Deer Isle (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 102 87 100 100 98 88 81 77 99 104 130 123
inches 4 3.4 3.9 3.9 3.9 3.5 3.2 3 3.9 4.1 5.1 4.8
Rainy days 12 10 12 12 12 12 11 10 10 11 13 13

Average annual rainfall in Deer Isle: 1164.1mm (458.3 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Deer Isle

Deer Isle average daily sunshine chart
Average daily sunshine Deer Isle
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.3 5.2 5.9 6.7 7.6 8.2 8.5 8.2 7.1 5.8 4.1 3.7

Day / night temperatures

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

Deer Isle average minimum / maximum temperatures (Celsius) Deer Isle average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Deer Isle (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -11.9 -10.9 -4.4 1.2 6.5 11.5 14.8 14.2 9.8 4.7 -0.3 -8.5
Max °C -1.3 -0.2 5 11.4 17.9 22.9 26 25 20.6 14.8 8.3 1.3
Min °F 10.6 12.5 24.1 34.2 43.7 52.7 58.6 57.6 49.6 40.4 31.5 16.7
Max °F 20.1 22.1 32.5 43.3 54 63 68.7 67.3 59.4 49.5 39.2 25.5

Sea temperature

The graph below shows the average sea temperature.

Deer Isle average sea temperature chart (Celsius) Deer Isle average sea temperature chart (Fahrenheit)
Average sea temperature around Deer Isle in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6.1 4.7 4.2 5.2 7.9 11 13.8 14.8 13.3 11.2 9.4 7.7
°F 43 40.5 39.5 41.4 46.2 51.7 56.8 58.6 55.9 52.1 48.8 45.9

Wind speed

The graph below shows the average wind speed.

Deer Isle average winspeed by month (km/h) Deer Isle average winspeed by month (mph)
Average wind speed in Deer Isle (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 17 18 17 15 14 13 12 13 14 16 16
mph 10 10 11 11 9 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.

Deer Isle relative humidity averages
Average relative humidity in Deer Isle
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
70% 69% 69% 70% 72% 75% 78% 79% 79% 77% 77% 74%

Other monthly averages

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Deer Isle weather stats

Deer Isle weather statistics
Hottest month: July 25.7°C 78.3°F
Driest month: August 77mm 3ins
Sunniest month: August 8.2hrs
Coldest month: January -1.6°C 29.1°F
Wettest month: November 130mm 5.1ins
Warmest sea: August 14.8°C 58.6°F
Map showing location of Deer Isle (44.22397, -68.67753) Deer Isle map pin © Google

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