Hartford Climate by Month
Hartford, Connecticut, United States
Warm summers and cold winters, with rain spread through the year.
The climate in Hartford is one of warm summers and cold winters, with rain spread through the year. July is the warmest month, with highs around 86°F (30°C); January is the coolest at 37°F (3°C), and nights dip to 19°F (-7°C). About 45 in (1140 mm) of rain falls in a typical year, with no clear rainy season.
- Warmest month
- 86°F(30°C)
- Average high, July
- Coldest nights
- 19°F(-7°C)
- Average low, January
- Rain per year
- 45 in(1140 mm)
- No clear rainy season
- Humidity
- 68%
- Sunniest: July
Best and worst months in Hartford
Best for weatherThe most comfortable weather comes in May and September, with highs around 75°F (24°C) and about 3.9 in (99 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 37°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)
Hartford weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 37°F(3°C) | 19°F(-7°C) | 3.3 in(84 mm) | 77% | 1.7 |
| FebFebruary | 40°F(4°C) | 20°F(-6°C) | 3.1 in(78 mm) | 71% | 2.6 |
| MarMarch | 48°F(9°C) | 29°F(-2°C) | 3.9 in(98 mm) | 64% | 3.5 |
| AprApril | 60°F(16°C) | 38°F(4°C) | 3.8 in(97 mm) | 59% | 4.5 |
| MayMayBest | 72°F(22°C) | 48°F(9°C) | 3.7 in(94 mm) | 62% | 5.2 |
| JunJune | 81°F(27°C) | 58°F(14°C) | 4.2 in(107 mm) | 66% | 5.5 |
| JulJuly | 86°F(30°C) | 63°F(17°C) | 3.7 in(95 mm) | 68% | 5.7 |
| AugAugust | 84°F(29°C) | 62°F(17°C) | 3.4 in(87 mm) | 68% | 5.0 |
| SepSeptemberBest | 77°F(25°C) | 54°F(12°C) | 4.1 in(103 mm) | 69% | 4.0 |
| OctOctober | 65°F(19°C) | 43°F(6°C) | 4.1 in(104 mm) | 70% | 2.7 |
| NovNovember | 53°F(12°C) | 34°F(1°C) | 3.5 in(88 mm) | 62% | 1.8 |
| DecDecember | 42°F(6°C) | 25°F(-4°C) | 4.1 in(105 mm) | 76% | 1.4 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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