Climate of Connecticut, USA
Area-weighted average across Connecticut. For where people actually live and travel, see the cities below.
Connecticut, a subdivision of United States of America, has a strongly continental climate on average. Area-weighted monthly temperatures across the whole territory range from -3.6°C / 25.5°F in January to 21.8°C / 71.2°F in July, with rainfall from 87 mm / 3.4 in to 112 mm / 4.4 in depending on the season (1225 mm / 48.2 in total across the year). See the 4 cities listed below for point-value climate at specific locations — these often differ from the area-weighted average, especially in geographically diverse subdivisions.
| Month | Temperature | Rainfall | Matches |
|---|---|---|---|
| January | -3.6°C25.5°F | 98 mm3.9″ | Snowy |
| February | -2.5°C27.5°F | 87 mm3.4″ | Snowy |
| March | 2.3°C36.1°F | 104 mm4.1″ | — |
| April | 8°C46.4°F | 108 mm4.3″ | — |
| May | 13.9°C57°F | 108 mm4.3″ | — |
| June | 18.7°C65.7°F | 100 mm3.9″ | — |
| July | 21.8°C71.2°F | 98 mm3.9″ | — |
| August | 21.1°C70°F | 102 mm4″ | — |
| September | 16.8°C62.2°F | 102 mm4″ | — |
| October | 10.8°C51.4°F | 101 mm4″ | — |
| November | 5.6°C42.1°F | 112 mm4.4″ | — |
| December | -0.3°C31.5°F | 105 mm4.1″ | Snowy |
Frequently asked questions
What is the best time to visit Connecticut?
Connecticut, United States of America does not have a clear sunny-and-dry window by our cutoffs. The warmest month is July at 21.8°C / 71.2°F, and the driest is February at 87 mm / 3.4 in — likely your best travel window. For city-level detail, see the cities section below.
What is the climate of Connecticut?
Connecticut, United States of America has area-weighted monthly average temperatures ranging from -3.6°C / 25.5°F in January to 21.8°C / 71.2°F in July. Annual rainfall averages about 1225 mm / 48.2 in, with the wettest month being November (112 mm / 4.4 in) and the driest February (87 mm / 3.4 in). Because this is an area average across the whole subdivision, local city values can differ substantially.
What is the hottest month in Connecticut?
The hottest month in Connecticut is July, with an area-wide average temperature of 21.8°C / 71.2°F.
What is the coldest month in Connecticut?
The coldest month in Connecticut is January, with an area-wide average temperature of -3.6°C / 25.5°F.
When does it rain most in Connecticut?
The wettest month in Connecticut is November, averaging about 112 mm / 4.4 in of rainfall. The driest is February with about 87 mm / 3.4 in.