Trumbull Climate by Month
Trumbull, Connecticut, United States
Warm summers and cold winters, with rain spread through the year.
The climate in Trumbull is one of warm summers and cold winters, with rain spread through the year. Expect highs of 84°F (29°C) in July and 38°F (3°C) in January, with the coldest nights (January) near 22°F (-6°C). About 48 in (1213 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 84°F(29°C)
- Average high, July
- Coldest nights
- 22°F(-6°C)
- Average low, January
- Rain per year
- 48 in(1213 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: July
Best and worst months in Trumbull
Best for weatherSeptember is the best time for weather in Trumbull: highs near 76°F (24°C) and about 3.9 in (100 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)
Trumbull weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 38°F(3°C) | 22°F(-6°C) | 3.5 in(90 mm) | 71% | 1.7 |
| FebFebruary | 40°F(5°C) | 23°F(-5°C) | 3.2 in(82 mm) | 66% | 2.6 |
| MarMarch | 49°F(9°C) | 30°F(-1°C) | 4.3 in(110 mm) | 61% | 3.5 |
| AprApril | 60°F(16°C) | 40°F(4°C) | 4.4 in(111 mm) | 57% | 4.5 |
| MayMay | 71°F(22°C) | 50°F(10°C) | 4.0 in(102 mm) | 62% | 5.3 |
| JunJune | 79°F(26°C) | 59°F(15°C) | 4.3 in(109 mm) | 70% | 5.7 |
| JulJuly | 84°F(29°C) | 65°F(18°C) | 3.8 in(97 mm) | 68% | 5.8 |
| AugAugust | 83°F(28°C) | 64°F(18°C) | 3.6 in(92 mm) | 72% | 5.1 |
| SepSeptemberBest | 76°F(24°C) | 56°F(13°C) | 3.9 in(100 mm) | 73% | 4.0 |
| OctOctober | 65°F(18°C) | 45°F(7°C) | 4.5 in(114 mm) | 69% | 2.8 |
| NovNovember | 54°F(12°C) | 36°F(2°C) | 3.8 in(96 mm) | 70% | 1.9 |
| DecDecember | 43°F(6°C) | 28°F(-2°C) | 4.3 in(110 mm) | 72% | 1.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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