New Haven weather by month & the best time to visit
🇺🇸 United States · coastal city break · humid subtropical climate
The best time to visit New Haven is May — its sunniest month (Sunshine Score 74/100), with July and August close behind. New Haven averages about 2,191 hours of sunshine a year. Daytime highs around 21°C / 70°F and roughly 95 mm of rain in May.
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- Sun hours / year
- 2,191
- Sunniest month
- May
- Peak score
- 74/100
- Rain / year
- 1,209 mm
- Snow / year
- ≈1.6 m
- Midday UV at peak
- 7 (high)
- Sea at warmest
- 24°C / 75°F
- Population
- 847k
- Elevation
- Sea level
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When is the best time to visit New Haven?
For sunshine, the best time to visit New Haven is May, then July and August. The dullest month is January (0/100, 76 mm of rain). The full month-by-month picture is in the table below.
How sunny is New Haven?
New Haven gets a moderate 2,191 hours of sunshine a year. 74 Sunshine Score points separate May (74) from January (0), so the month you pick matters. It ranks #325 of 580 destinations in United States for annual sunshine, below the national median of 2,279 hours. The year's 1,209 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 0 | 2° / 36°F | -7° / 19°F | 76 mm | 1 | 5° / 41°F |
| February | 0 | 3° / 37°F | -6° / 21°F | 81 mm | 2 | 4° / 39°F |
| March | 0 | 8° / 46°F | -2° / 28°F | 97 mm | 3 | 6° / 43°F |
| April | 42 | 15° / 59°F | 3° / 37°F | 105 mm | 5 | 9° / 48°F |
| May | 74 | 21° / 70°F | 10° / 50°F | 95 mm | 6 | 15° / 59°F |
| June | 70 | 26° / 79°F | 15° / 59°F | 118 mm | 7 | 20° / 68°F |
| July | 73 | 30° / 86°F | 19° / 66°F | 101 mm | 7 | 24° / 75°F |
| August | 72 | 29° / 84°F | 18° / 64°F | 109 mm | 6 | 24° / 75°F |
| September | 72 | 25° / 77°F | 14° / 57°F | 106 mm | 5 | 22° / 72°F |
| October | 58 | 18° / 64°F | 8° / 46°F | 121 mm | 3 | 18° / 64°F |
| November | 19 | 11° / 52°F | 2° / 36°F | 89 mm | 2 | 13° / 55°F |
| December | 0 | 5° / 41°F | -3° / 27°F | 111 mm | 1 | 7° / 45°F |
Sea temperature in New Haven by month
The sea off New Haven is warmest in July at around 24°C / 75°F, and coolest in February at 4°C / 39°F. The water sits at a comfortable 21°C or warmer roughly 3 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See New Haven on the interactive sunshine globe →
Nearby places for sunshine
- Islip United States · 55 km · best in Jul · 2,252 h sun/yr
- White Plains United States · 72 km · best in May · 2,150 h sun/yr
- Hartford United States · 77 km · best in May · 2,192 h sun/yr
- New York United States · 102 km · best in Sep · 2,252 h sun/yr
- Providence/Warwick United States · 132 km · best in Aug · 2,279 h sun/yr
- Albany United States · 182 km · best in May · 2,041 h sun/yr
Nearest destinations
- Montauk United States · 84 km · 2,278 h sun/yr · best in Jul
- Westerly United States · 91 km · 2,279 h sun/yr · best in Jul
Head-to-head
How New Haven compares month by month: New Haven vs Hartford · New Haven vs Albany · New Haven vs White Plains · New Haven vs Islip · all comparisons
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