Hartford, CT Climate & Monthly Averages
The climate of Hartford
Located in Connecticut, United States, Hartford experiences a humid subtropical climate with hot, humid summers and generally mild winters. Afternoon temperatures peak near 85°F (29°C) in July and dip to about 38°F (3°C) in January, with around 48.5 inches (1232 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: July - highs near 85°F (29°C)
- Coldest month: January - highs near 38°F (3°C)
- Record high: 99°F (37°C) · Record low: -16°F (-26°C) (2015–2024)
- Wettest month: September (9 rainy days) · Sunniest: July (11.2 h sun/day)
- Climate type: humid subtropical - hot, humid summers and generally mild winters
- Snow: about 14 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 85°F (29°C) and overnight lows stay near 66°F (19°C). The coolest month is January, with typical highs of 38°F (3°C) and lows around 22°F (-5°C). Based on 2015–2024 weather data, temperatures have reached as high as 99°F (37°C) and dropped as low as -16°F (-26°C).
Rain, sun and snow
September is usually the wettest month. It brings about 5.0 inches (127 mm) of rain over 9 days, while November is the driest. July brings the most sunshine, averaging 11.2 hours of sun a day. Snow falls on about 14 days in a typical year, mostly from November through April.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 38° | 22° | 10 | 4.0 in | 6.1 h/day | 67% |
| February | 41° | 22° | 10 | 3.4 in | 6.8 h/day | 69% |
| March | 48° | 29° | 11 | 4.0 in | 8.1 h/day | 65% |
| April | 59° | 39° | 12 | 4.3 in | 8.4 h/day | 68% |
| May | 70° | 50° | 11 | 3.6 in | 9.8 h/day | 70% |
| June | 79° | 59° | 11 | 3.5 in | 10.9 h/day | 71% |
| July | 85° | 66° | 13 | 5.0 in | 11.2 h/day | 74% |
| August | 83° | 65° | 11 | 3.7 in | 10.5 h/day | 74% |
| September | 76° | 58° | 9 | 5.0 in | 8.7 h/day | 76% |
| October | 65° | 48° | 10 | 4.4 in | 7.5 h/day | 76% |
| November | 52° | 36° | 9 | 3.1 in | 6.7 h/day | 72% |
| December | 43° | 28° | 11 | 4.5 in | 5.6 h/day | 74% |
Hartford month by month
Hartford weather in January
January brings highs around 38°F (3°C), lows near 22°F (-5°C), about 10 wet days and roughly 3 snowy days - typically the coldest month of the year in Hartford.
Hartford weather in February
February brings highs around 41°F (5°C), lows near 22°F (-6°C), about 10 wet days and roughly 4 snowy days.
Hartford weather in March
March brings highs around 48°F (9°C), lows near 29°F (-2°C), about 11 wet days and roughly 2 snowy days.
Hartford weather in April
April brings highs around 59°F (15°C), lows near 39°F (4°C), about 12 wet days.
Hartford weather in May
May brings highs around 70°F (21°C), lows near 50°F (10°C), about 11 wet days.
Hartford weather in June
June brings highs around 79°F (26°C), lows near 59°F (15°C), about 11 wet days.
Hartford weather in July
July brings highs around 85°F (29°C), lows near 66°F (19°C), about 13 wet days - typically the hottest month and the sunniest month of the year in Hartford.
Hartford weather in August
August brings highs around 83°F (28°C), lows near 65°F (18°C), about 11 wet days.
Hartford weather in September
September brings highs around 76°F (24°C), lows near 58°F (15°C), about 9 wet days - typically the wettest month of the year in Hartford.
Hartford weather in October
October brings highs around 65°F (18°C), lows near 48°F (9°C), about 10 wet days.
Hartford weather in November
November brings highs around 52°F (11°C), lows near 36°F (2°C), about 9 wet days - typically the driest month of the year in Hartford.
Hartford weather in December
December brings highs around 43°F (6°C), lows near 28°F (-2°C), about 11 wet days and roughly 2 snowy days.
Seasons in Hartford
Spring (March through May)
Spring in Hartford is mild, with daytime highs averaging 59°F (15°C) and nights around 39°F (4°C); expect showers on roughly 34 days across the season, plus around 3 snowy days.
Summer (June through August)
Summer in Hartford is hot, with daytime highs averaging 82°F (28°C) and nights around 63°F (17°C); expect showers on roughly 35 days across the season.
Fall (September through November)
Fall in Hartford stays on the cool side of mild, with daytime highs averaging 64°F (18°C) and nights around 47°F (8°C); expect showers on roughly 28 days across the season.
Winter (December through February)
Winter in Hartford runs cold, with daytime highs averaging 40°F (5°C) and nights around 24°F (-4°C); expect showers on roughly 31 days across the season, plus around 10 snowy days.
Climate questions, answered
What is the average temperature in Hartford?
Is Hartford hot in summer?
Is Hartford cold in winter?
How many rainy days does Hartford get in a year?
Best time to visit Hartford
The best time to visit Hartford is generally August to October and May to June, when warm days, manageable rainfall and plenty of daylight line up. Daytime temperatures in that window typically sit near 75°F (24°C).
Pack for Hartford with a heavy insulated coat, hat and gloves for winter; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 66°F (19°C).
Hartford temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.