Precipitation
Rainfall is the most common form of precipitation in Houston. The wettest month is June, with 5.93 inches (151 mm) of rain. On average, Houston sees 30–40 days of rain per year. The city receives 49.77 inches (1,264 mm) of rain in an average year. The most precipitation to fall in one year was 72.86 inches (1,850.6 mm) which occurred in 1900. Houston has received less than 20 inches (510 mm) of rain only once: 17.66 inches in 1917. Flash flood warnings are common all year, and due to the flat landscape, heavy rains can be a threat to the city.
Sleet, snow and ice are unusual, and sometimes never occur at all during the winter. Hail can accumulate, yet only in small quantities. Frozen precipitation does not survive the warmer temperatures.
Read more about this topic: Climate Of Houston