Weather history and climate summary information is available for the following locations:
Warmest May Days
The warmest May days in Arizona are:
| Phoenix, Arizona | 1983 | 113°F |
| Phoenix, Arizona | 1984 | 113°F |
| Phoenix, Arizona | 1996 | 111.9°F |
| Phoenix, Arizona | 1958 | 111°F |
| Phoenix, Arizona | 2003 | 111°F |
Coldest May Days
The coldest May days in Arizona were:
| Winslow, Arizona | 2011 | 24.1°F |
| Winslow, Arizona | 1977 | 25°F |
| Winslow, Arizona | 2008 | 25°F |
| Winslow, Arizona | 1975 | 25°F |
| Winslow, Arizona | 2010 | 26.1°F |
Wettest May Days
The wettest single days in May occurred:
| Phoenix, Arizona | 2008 | 11.4 inches |
| Tucson, Arizona | 2008 | 4.2 inches |
| Phoenix, Arizona | 1979 | 1.5 inches |
| Tucson, Arizona | 1978 | 1.1 inches |
| Tucson, Arizona | 2012 | 1 inches |