West Haven Climate by Month
West Haven, Connecticut, United States
Warm summers and cold winters, with rain spread through the year.
Warm summers and cold winters, with rain spread through the year: that's West Haven's climate in short. July is the warmest month, with highs around 85°F (30°C); January is the coolest at 38°F (3°C), and nights dip to 22°F (-5°C). About 46 in (1172 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 85°F(30°C)
- Average high, July
- Coldest nights
- 22°F(-5°C)
- Average low, January
- Rain per year
- 46 in(1172 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: July
Best and worst months in West Haven
Best for weatherThe most comfortable weather comes in September, with highs around 76°F (25°C) and about 3.7 in (94 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 38°F (3°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
West Haven weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 38°F(3°C) | 22°F(-5°C) | 3.4 in(86 mm) | 71% | 1.8 |
| FebFebruary | 41°F(5°C) | 23°F(-5°C) | 3.3 in(84 mm) | 65% | 2.6 |
| MarMarch | 49°F(9°C) | 31°F(-1°C) | 4.2 in(106 mm) | 60% | 3.5 |
| AprApril | 60°F(16°C) | 40°F(4°C) | 4.1 in(105 mm) | 57% | 4.6 |
| MayMay | 71°F(22°C) | 49°F(10°C) | 3.7 in(94 mm) | 62% | 5.3 |
| JunJune | 80°F(27°C) | 59°F(15°C) | 4.1 in(104 mm) | 69% | 5.7 |
| JulJuly | 85°F(30°C) | 65°F(18°C) | 3.9 in(98 mm) | 71% | 5.8 |
| AugAugust | 83°F(29°C) | 64°F(18°C) | 3.7 in(94 mm) | 71% | 5.2 |
| SepSeptemberBest | 76°F(25°C) | 56°F(13°C) | 3.7 in(94 mm) | 73% | 4.0 |
| OctOctober | 65°F(18°C) | 44°F(7°C) | 4.3 in(109 mm) | 76% | 2.8 |
| NovNovember | 54°F(12°C) | 36°F(2°C) | 3.6 in(91 mm) | 70% | 1.9 |
| DecDecember | 43°F(6°C) | 28°F(-2°C) | 4.2 in(107 mm) | 71% | 1.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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