Weather history and climate summary information is available for the following locations:
- Baltimore
- Camp Springs
- Patuxent River
Warmest May Days
The warmest May days in Maryland are:
| Baltimore, Maryland | 1962 | 98.4°F |
| Baltimore, Maryland | 1991 | 98.1°F |
| Baltimore, Maryland | 2011 | 98.1°F |
| Patuxent River, Maryland | 1996 | 98.1°F |
| Patuxent River, Maryland | 1965 | 97.3°F |
Coldest May Days
The coldest May days in Maryland were:
| Baltimore, Maryland | 1956 | 33.1°F |
| Baltimore, Maryland | 1997 | 33.1°F |
| Camp Springs, Maryland | 1947 | 33.4°F |
| Camp Springs, Maryland | 1966 | 33.4°F |
| Patuxent River, Maryland | 2003 | 33.8°F |
Wettest May Days
The wettest single days in May occurred:
| Patuxent River, Maryland | 1984 | 5.3 inches |
| Camp Springs, Maryland | 1982 | 4.6 inches |
| Camp Springs, Maryland | 2008 | 4.6 inches |
| Camp Springs, Maryland | 1990 | 4.3 inches |
| Baltimore, Maryland | 1960 | 3.3 inches |