Temperature for January
In Phoenix, AZ during January the average high temperature is 65.9°F. The hottest day on record was January 19, 1971 when the temperature hit 84.9°F.
Precipitation for January
In January the average monthly rainfall in Phoenix, AZ is 0.57 inches with rain usually falling on between 5 and 6 days. 1943 was the driest January with only 0.00 inches of rain falling, and 1993 was the wettest January with 5.46 inches of rain. The wettest single day in January was 22 January 2010 when 1.92 inches of rain fell.
In January it usually snows on between 0 and 1 days. In January there have been some years when thunderstorms have occurred, although there are other years when there hasn't been a thunderstorm in January.