Old Saybrook (CT) monthly weather averages

Average daytime temperature

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

Old Saybrook average temperature chart (Celsius) Old Saybrook average temperature chart (Fahrenheit)
Average monthly temperatures in Old Saybrook (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 2.1 2.9 7.8 13.4 19 24 27 26.5 22.9 17.3 11.4 4.8
°F 35.8 37.2 46 56.1 66.2 75.3 80.5 79.6 73.2 63.1 52.5 40.7

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.

Old Saybrook monthly rainfall chart (mm) Old Saybrook monthly rainfall chart (inches)
Average monthly rainfall in Old Saybrook (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 98 92 109 102 96 82 84 101 94 94 114 112
inches 3.9 3.6 4.3 4 3.8 3.2 3.3 4 3.7 3.7 4.5 4.4
Rainy days 11 10 11 10 11 11 9 9 8 8 11 12

Average annual rainfall in Old Saybrook: 1146.733mm (451.5 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Old Saybrook

Old Saybrook average daily sunshine chart
Average daily sunshine Old Saybrook
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.2 7.1 8 8.6 9.2 9.8 9.6 9 8.1 7.4 5.5 5.2

Day / night temperatures

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

Old Saybrook average minimum / maximum temperatures (Celsius) Old Saybrook average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Old Saybrook (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -7 -6.1 -1.6 3 8.4 13.5 16.8 16.3 12.1 6.3 1.6 -3.9
Max °C 2.4 3.1 8 13.7 19.3 24.3 27.2 26.7 23.2 17.6 11.7 5.1
Min °F 19.5 21 29.1 37.3 47 56.3 62.2 61.3 53.7 43.3 34.8 25.1
Max °F 27.9 29.3 37.8 46.9 56.8 66 71.6 70.7 63.7 53.4 43.9 33.1

Sea temperature

The graph below shows the average sea temperature.

Old Saybrook average sea temperature chart (Celsius) Old Saybrook average sea temperature chart (Fahrenheit)
Average sea temperature around Old Saybrook in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 6 4 3.7 5.8 10.3 15.9 20.6 21.7 19.6 15.8 12.1 8.9
°F 42.8 39.1 38.7 42.5 50.6 60.6 69.1 71 67.3 60.5 53.8 48

Wind speed

The graph below shows the average wind speed.

Old Saybrook average winspeed by month (km/h) Old Saybrook average winspeed by month (mph)
Average wind speed in Old Saybrook (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 18 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.

Old Saybrook relative humidity averages
Average relative humidity in Old Saybrook
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
66% 65% 64% 62% 68% 71% 72% 74% 74% 71% 70% 68%