Average Data
On average, there are 236 sunny days per year in Decatur, Texas. The July high is around 98 degrees. The January low is 30. Our comfort index, which is based on humidity during the hot months, is a 24 out of 100, where higher is more comfortable. The U.S. average on the comfort index is 44.
Decatur, TX, gets 34 inches of rain per year. The U.S. average is 37. Snowfall is 2 inches. The average U.S. city gets 25 inches of snow per year. The number of days with any measurable precipitation is 62.