Weather history and climate summary information is available for the following locations:
- Dover
Warmest May Days
The warmest May days in Delaware are:
| Dover, Delaware | 1965 | 97.3°F |
| Dover, Delaware | 1996 | 95.9°F |
| Dover, Delaware | 1991 | 95°F |
| Dover, Delaware | 1977 | 95°F |
| Dover, Delaware | 1956 | 93.4°F |
Coldest May Days
The coldest May days in Delaware were:
| Dover, Delaware | 2009 | -4.4°F |
| Dover, Delaware | 1966 | 34.3°F |
| Dover, Delaware | 1970 | 35.1°F |
| Dover, Delaware | 1956 | 36.3°F |
| Dover, Delaware | 1957 | 36.3°F |
Wettest May Days
The wettest single days in May occurred:
| Dover, Delaware | 1984 | 3.4 inches |
| Dover, Delaware | 2005 | 2.3 inches |
| Dover, Delaware | 1988 | 2.1 inches |
| Dover, Delaware | 1990 | 1.9 inches |
| Dover, Delaware | 1992 | 1.7 inches |