Hartford Weather History
Connecticut · US States · Weather data 1976–today
Hartford sits 4649km from the equator, 27m above sea level. That combination gives it a climate with hot, humid summers, mild winters, and rain year round (Humid subtropical climate). Its record high is 39.7°C, set 2011-07-22, its record low -27.9°C, set 1984-01-22.
Data through August 4, 2026.
Frequently asked questions about the weather in Hartford
What is the hottest temperature ever recorded in Hartford?
The highest temperature in this record for Hartford is 39.7°C, measured on 2011-07-22. That is a recorded daily value from Hartford's own series covering 1976 to 2025, not an estimate or a regional average.
What is the coldest temperature ever recorded in Hartford?
The lowest temperature in this record for Hartford is -27.9°C, measured on 1984-01-22. Together with the heat record above, that spans the full range this city has actually experienced across 1976 to 2025.
How much rain does Hartford get a year?
Hartford averages 1131mm of precipitation a year, spread across roughly 120 days with at least 1mm. That average is taken over 50 complete calendar years, so one exceptionally wet or dry year does not set the figure.
What was the wettest day on record in Hartford?
On 1999-09-16, 107.8mm fell on Hartford, the highest single-day total in this series. For scale, that is roughly 10% of what the city receives in an average full year, in one day.
How many hours of sunshine does Hartford get a year?
Hartford averages 3118 sunshine hours a year, which works out to about 8.5 hours a day across the whole year. Sunshine hours measure the time direct sunlight actually reaches the ground, not simply how long it is light.
How warm are summers and how cold are winters in Hartford?
Across the summer months Hartford averages a daytime high near 27.2°C, while winter nights average -5.6°C. The seasons here are set from Hartford's position relative to the equator rather than a fixed northern-hemisphere calendar.
What is the strongest wind recorded in Hartford?
The strongest wind speed recorded in Hartford is 45 km/h, on 2017-10-30. That is the daily maximum sustained wind rather than the peak gust, which typically runs higher still.
