New Haven, CT Weather & Climate Normals
New Haven's real weather, in one number
New Haven, CT scores 51/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
New Haven's hottest and coldest months
New Haven's hottest month is Jul, averaging 74°F; its coldest is Jan, averaging 31°F, a 43.3°F swing across the year, a middling gap by national standards.
New Haven's weather across the year
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 38°F | 23°F | 2.72in |
| Feb | 40°F | 24°F | 2.84in |
| Mar | 47°F | 30°F | 3.66in |
| Apr | 58°F | 39°F | 4.19in |
| May | 68°F | 49°F | 3.54in |
| Jun | 76°F | 59°F | 3.47in |
| Jul | 82°F | 66°F | 3.36in |
| Aug | 81°F | 65°F | 3.55in |
| Sep | 75°F | 57°F | 4.03in |
| Oct | 64°F | 46°F | 3.78in |
| Nov | 53°F | 36°F | 3.12in |
| Dec | 44°F | 29°F | 3.53in |
May, Jun, Jul, Aug, and Sep are the best time to see New Haven at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in New Haven
Over a typical year, New Haven sees about 41.79in of precipitation a year across roughly 124 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where New Haven ranks
New Haven ranks 1427 of 4876 US cities in this dataset for comfort score, and 1 of 21 within CT. About 137,562 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from New Haven Tweed Ap, CT US, 3.8 miles from New Haven, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is