Temperature for May
In Houston, TX during May the average high temperature is 84.7°F. The hottest day on record was May 31, 1998 when the temperature hit 100.4°F.
Precipitation for May
In May the average monthly rainfall in Houston, TX is 1.91 inches with rain usually falling on between 8 and 9 days. 2012 was the driest May with only 0.00 inches of rain falling, and 1975 was the wettest May with 10.57 inches of rain. The wettest single day in May was 4 May 1981 when 4.06 inches of rain fell.
In May it usually snows on between 0 and 1 days. There are thunderstorms on between 5 and 6 days in May.