Hartford (CT) monthly weather averages

Average daytime temperature

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

Hartford average temperature chart (Celsius) Hartford average temperature chart (Fahrenheit)
Average monthly temperatures in Hartford (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 0.7 2.2 7.7 14.6 20.8 25.7 28.3 27.3 23.2 17.2 10.4 3.1
°F 33.3 35.9 45.9 58.2 69.4 78.2 82.9 81.1 73.7 63 50.7 37.6

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.

Hartford monthly rainfall chart (mm) Hartford monthly rainfall chart (inches)
Average monthly rainfall in Hartford (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 84 79 92 100 101 95 88 93 95 90 101 97
inches 3.3 3.1 3.6 3.9 4 3.7 3.5 3.7 3.7 3.5 4 3.8
Rainy days 11 10 11 11 12 11 9 10 9 8 11 12

Average annual rainfall in Hartford: 1083.5mm (426.6 inches)

Average daily sunshine

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

Hartford average daily sunshine chart
Average daily sunshine Hartford
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.1 6.9 7.6 8.2 8.9 9.7 9.9 9.2 8 7.1 5.2 5.1

Day / night temperatures

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

Hartford average minimum / maximum temperatures (Celsius) Hartford average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Hartford (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -8.8 -7.4 -2.4 2.8 8.3 13.5 16.5 15.7 11.2 5.1 0.6 -5.8
Max °C 1 2.4 8 14.9 21.1 26 28.6 27.6 23.5 17.5 10.7 3.4
Min °F 16.3 18.7 27.8 37 46.9 56.2 61.6 60.2 52.1 41.2 33 21.7
Max °F 25 27.5 37 47.8 58.5 67.5 72.5 70.9 63.1 52.3 42.1 29.8

Sea temperature

The graph below shows the average sea temperature.

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

Hartford average winspeed by month (km/h) Hartford average winspeed by month (mph)
Average wind speed in Hartford (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 17 17 18 18 16 14 14 13 14 15 16 16
mph 10 11 11 11 10 9 9 8 9 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.

Hartford relative humidity averages
Average relative humidity in Hartford
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
65% 64% 62% 60% 65% 69% 70% 72% 74% 70% 69% 69%