This page tracks the highest and lowest temperatures ever officially recorded at 13 weather stations across Connecticut, United States, based on measurements dating from 1919 to 2026. Use the interactive map or the list below to see the record high and record low temperature (in Fahrenheit) for each location, along with the date each record was set.
| Location | Temperature | Record Date |
| Burlington | 100 °F (38 °C) | July 23, 2011 |
| Danbury | 106 °F (41 °C) | July 15, 1995 |
| Hartford | 103 °F (39 °C) | August 9, 2001 |
| Long Hill | 101 °F (38 °C) | July 21, 1991 |
| New Hartford | 99 °F (37 °C) | July 7, 2010 |
| New Haven | 101 °F (38 °C) | July 22, 2011 |
| Norfolk | 94 °F (34 °C) | July 3, 2026 |
| North Grosvenordale | 100 °F (38 °C) | August 3, 1975 |
| Norwich | 102 °F (39 °C) | August 10, 2001 |
| Stamford | 104 °F (40 °C) | August 9, 2001 |
| Storrs | 101 °F (38 °C) | July 6, 1919 |
| Stratford | 103 °F (39 °C) | July 22, 2011 |
| Windsor Locks | 103 °F (39 °C) | July 22, 2011 |
The highest temperature ever officially recorded in Connecticut, United States was 106 °F (41 °C), set in Danbury on July 15, 1995.
The lowest temperature ever officially recorded in Connecticut, United States was -26 °F (-32 °C), set in Windsor Locks on January 22, 1961.
This page includes record high and low temperature data for 13 weather stations in Connecticut, United States.
The record highs and lows on this page span from 1919 to 2026 and are updated whenever a new station record is set.