Weather history and climate summary information is available for the following locations:
Warmest December Days
The warmest December days in Arizona are:
| Phoenix, Arizona | 1958 | 87.1°F |
| Phoenix, Arizona | 1980 | 86°F |
| Phoenix, Arizona | 1980 | 86°F |
| Tucson, Arizona | 1999 | 84.9°F |
| Mesa, Arizona | 1955 | 84.4°F |
Coldest December Days
The coldest December days in Arizona were:
| Winslow, Arizona | 1978 | -11°F |
| Winslow, Arizona | 1990 | -10.8°F |
| Winslow, Arizona | 1974 | -5.8°F |
| Winslow, Arizona | 1987 | -2.7°F |
| Winslow, Arizona | 2005 | 0°F |
Wettest December Days
The wettest single days in December occurred:
| Phoenix, Arizona | 1978 | 1.7 inches |
| Tucson, Arizona | 2011 | 1.6 inches |
| Tucson, Arizona | 1994 | 1.5 inches |
| Phoenix, Arizona | 1987 | 1.5 inches |
| Tucson, Arizona | 1992 | 1.5 inches |