Temperature for August
In Portland, ME during August the average high temperature is 79.6°F. The hottest day on record was August 2, 1975 when the temperature hit 102.9°F.
Precipitation for August
In August the average monthly rainfall in Portland, ME is 4.31 inches with rain usually falling on between 11 and 12 days. 1995 was the driest August with only 0.47 inches of rain falling, and 1992 was the wettest August with 32.73 inches of rain. The wettest single day in August was 18 August 1992 when 13.31 inches of rain fell.
There are thunderstorms on between 2 and 3 days in August.