Weather history and climate summary information is available for the following locations:
- Bismarck
- Fargo
Warmest May Days
The warmest May days in North Dakota are:
| Fargo, North Dakota | 1964 | 98.1°F |
| Fargo, North Dakota | 2006 | 97°F |
| Bismarck, North Dakota | 1980 | 96.1°F |
| Fargo, North Dakota | 2000 | 96.1°F |
| Fargo, North Dakota | 2012 | 96.1°F |
Coldest May Days
The coldest May days in North Dakota were:
| Bismarck, North Dakota | 1989 | 17.1°F |
| Bismarck, North Dakota | 2005 | 18°F |
| Bismarck, North Dakota | 1984 | 19.9°F |
| Fargo, North Dakota | 2005 | 19.9°F |
| Fargo, North Dakota | 1976 | 21°F |
Wettest May Days
The wettest single days in May occurred:
| Bismarck, North Dakota | 1973 | 5.7 inches |
| Fargo, North Dakota | 1977 | 4.1 inches |
| Bismarck, North Dakota | 1985 | 2.5 inches |
| Fargo, North Dakota | 2004 | 2.5 inches |
| Bismarck, North Dakota | 2007 | 2.1 inches |