Temperature for August
In Phoenix, AZ during August the average high temperature is 105.7°F. The hottest day on record was August 27, 2011 when the temperature hit 117.0°F.
Precipitation for August
In August the average monthly rainfall in Phoenix, AZ is 1.16 inches with rain usually falling on between 5 and 6 days. 1994 was the driest August with only 0.02 inches of rain falling, and 2008 was the wettest August with 3.56 inches of rain. The wettest single day in August was 17 August 1983 when 1.32 inches of rain fell.
There are thunderstorms on between 4 and 5 days in August.