Decatur, TX Climate

Climate Insight: Decatur, TX

The NOAA 1991–2020 climate normals describe Decatur, Texas as a location with an annual average temperature of 65°F, ranging from a mean daily high of 76°F to a mean daily low of 54°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00412334, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.

Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Decatur receives roughly 38.9 inches of precipitation each year, with 0.8 inches typically falling as snow. The frost-free season averages 236 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 20 and the first fall freeze near November 11. For energy use, 2,534 heating degree days and 2,551 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Decatur scores 93/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.