Hartford, CT All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Hartford, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 102.9°F (39°C) | August 9, 2001 and July 22, 2011 |
| Record Low | -23.9°F (-31°C) | February 16, 1943 |
| Lowest High | -0.9°F (-18°C) | December 26, 1980 |
| Highest Low | 78.9°F (26°C) | August 9, 2022 |
| Highest Mean | 89.4°F (32°C) | July 22, 2011 |
| Lowest Mean | -9°F (-23°C) | February 15, 1943 |
| Precipitation | ||
| Max in One Calendar Day | 6.10" (154.9 mm) | September 20, 1938 |
| Max in One Month | 14.59" (370.6 mm) | September 1938 |
| Least in One Month | 0.17" (4.4 mm) | June 1999 |
| Max in One Year | 64.55" (1639.5 mm) | 2023 |
| Least in One Year | 28.47" (723.1 mm) | 1965 |
| Snowfall | ||
| Max in One Calendar Day | 17.7" (45.0 cm) | December 29, 1945 |
| Max in One Month | 40.2" (102.1 cm) | January 1923 |
| Max in One Season | 68.8" (174.8 cm) | 1945-46 |
| Max in One Year | 92.4" (234.8 cm) | 1945 |
| Earliest Snow | 0.1" (0.3 cm) | October 30, 1925 |
| Earliest Measurable Snow | 0.1" (0.3 cm) | October 30, 1925 |
| Latest Snow | 0.3" (0.8 cm) | April 25, 1971 |
| Latest Measurable Snow | 0.3" (0.8 cm) | April 25, 1971 |
| Period of Record | ||
| Temperature | January 1, 1920 – February 5, 2025 | |
| Precipitation | January 1, 1920 – February 5, 2025 | |
| Snowfall | December 1, 1920 – June 30, 1999 | |
Note: Records compiled from NOAA GHCN-Daily observations at HARTFORD BRAINARD FLD (3 mi from Hartford, CT). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Hartford, CT?
The all-time record high in Hartford, CT is 102.9°F (39°C), set on August 9, 2001 and July 22, 2011.
What is the coldest temperature ever recorded in Hartford, CT?
The all-time record low in Hartford, CT is -23.9°F (-31°C), set on February 16, 1943.
What is the most rain Hartford, CT has ever had in one day?
The most precipitation recorded in one calendar day near Hartford, CT is 6.10 inches, on September 20, 1938.
What is the biggest snowfall ever recorded in Hartford, CT?
The most snow recorded in one calendar day near Hartford, CT is 17.7 inches, on December 29, 1945.
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