Hartford, CT Weather
Hartford hourly forecast: next 24 hours
Today's high of 71°F (22°C) is about 5°F (3°C) below the typical September high of 76°F (24°C).
Current conditions in detail
Hartford weather tomorrow (Wednesday, September 16)
Tomorrow in Hartford looks sunny, with a high of 76° and an overnight low of 54°. Rain is unlikely (12% chance). Winds top out near 8 mph, and the UV index reaches 6 (high).
Hartford 14-day forecast
About the weather in Hartford
Hartford spends most of the year cold. July, the warmest month, averages 85°F (29°C) by day - a figure many cities in our dataset pass in early spring - while January holds at 38°F (3°C) with 128 wet days a year across the whole calendar.
Hartford weather: quick facts
- Hottest month: July - highs near 85°F (29°C)
- Coldest month: January - highs near 38°F (3°C)
- Decade extremes (2015-2024): 99°F (37°C) high · -16°F (-26°C) low
- Wettest month: September (9 rainy days) · Sunniest: July (11.2 h sun/day)
- Climate type: humid subtropical
- Annual swing: 25°C between the average warmest and coolest month · day to night: 10°C
- Snow: about 14 days a year
- Months with freezing average lows: 4
- Average humidity: 71%
Temperatures through the year
Snow falls on roughly 14 days a year, mostly November through April. January bottoms out at 38°F (3°C) in daylight, 22°F (-5°C) after dark. Warmth peaks in July: highs of 85°F (29°C), lows of 66°F (19°C). The gridded 2015-2024 daily record for this location tops out at 99°F (37°C) and bottoms at -16°F (-26°C) - decade extremes, not all-time station records. Overnight lows average at or below freezing for 4 months, December through March.
Rain, sun and snow
Sunshine averages 8.4 hours a day over the year, peaking in July at 11.2 hours. Between the average July and the average January lie 25°C, a wider spread than roughly 84% of the cities we track. The wettest month is September (5.0 inches (127 mm) across 9 days) and the driest November.
Season by season
Spring (March through May)
Through spring, Hartford is mild: 59°F (15°C) by day, 39°F (4°C) after dark, and rain falls on around 34 of the 90 days, plus about 3 snowy days.
Summer (June through August)
Summer sits firmly in the heat here - highs near 82°F (28°C), nights near 63°F (17°C), and rain falls on around 35 of the 90 days. Daylight is generous - around 10.9 hours of sun a day.
Fall (September through November)
Fall in Hartford is 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 is brisk and cold, with daytime highs averaging 40°F (5°C) and nights around 24°F (-4°C); rain falls on around 31 of the 90 days, plus about 10 snowy days.
Average temperatures in Hartford by month
| 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% |