Mystic (CT) monthly weather averages

Average daytime temperature

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

Mystic average temperature chart (Celsius) Mystic average temperature chart (Fahrenheit)
Average monthly temperatures in Mystic (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.1 2.8 7.3 12.8 18.3 23.3 26.4 26 22.1 16.6 10.9 4.8
°F 35.7 37.1 45.2 55.1 64.9 73.9 79.5 78.7 71.8 61.9 51.6 40.6

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.

Mystic monthly rainfall chart (mm) Mystic monthly rainfall chart (inches)
Average monthly rainfall in Mystic (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 103 95 111 108 99 84 86 102 97 98 123 116
inches 4 3.7 4.4 4.2 3.9 3.3 3.4 4 3.8 3.9 4.9 4.6
Rainy days 11 10 11 11 11 11 9 9 8 8 11 12

Average annual rainfall in Mystic: 1190.4mm (468.7 inches)

Average daily sunshine

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

Mystic average daily sunshine chart
Average daily sunshine Mystic
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.3 7.2 8.1 8.6 9.2 9.8 9.5 8.8 8.1 7.5 5.5 5.3

Day / night temperatures

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

Mystic average minimum / maximum temperatures (Celsius) Mystic average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Mystic (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7.1 -6.3 -1.8 3 8.3 13.3 16.8 16.4 12.3 6.6 1.9 -4
Max °C 2.3 3.1 7.6 13.1 18.5 23.5 26.6 26.2 22.4 16.9 11.1 5
Min °F 19.2 20.8 28.9 37.3 46.9 55.9 62.2 61.5 54.1 43.8 35.4 24.8
Max °F 27.7 29.1 37.2 46.4 56.1 65.1 71.1 70.3 63.1 53.1 43.7 32.9

Sea temperature

The graph below shows the average sea temperature.

Mystic average sea temperature chart (Celsius) Mystic average sea temperature chart (Fahrenheit)
Average sea temperature around Mystic in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6 4.1 3.9 5.7 9.8 15 19.9 21.4 19.4 15.6 11.8 8.7
°F 42.7 39.4 39 42.3 49.6 59 67.9 70.6 66.9 60.1 53.2 47.6

Wind speed

The graph below shows the average wind speed.

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

Mystic relative humidity averages
Average relative humidity in Mystic
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 64% 63% 61% 67% 70% 71% 74% 74% 70% 69% 68%