This page tracks the highest and lowest temperatures ever officially recorded at 7 weather stations across Delaware, United States, based on measurements dating from 1895 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 |
| Dover | 104 °F (40 °C) | July 21, 1930 |
| Dover AFB | 103 °F (39 °C) | July 17, 1988 |
| Georgetown | 104 °F (40 °C) | July 23, 2011 |
| Lewes | 102 °F (39 °C) | June 21, 1997 |
| New Castle | 103 °F (39 °C) | July 7, 2010 |
| Newark | 105 °F (41 °C) | July 16, 1983 |
| Wilmington | 103 °F (39 °C) | July 10, 1936 |
The highest temperature ever officially recorded in Delaware, United States was 105 °F (41 °C), set in Newark on July 16, 1983.
The lowest temperature ever officially recorded in Delaware, United States was -22 °F (-30 °C), set in Newark on February 3, 1895.
This page includes record high and low temperature data for 7 weather stations in Delaware, United States.
The record highs and lows on this page span from 1895 to 2026 and are updated whenever a new station record is set.