Galveston County Climate
Galveston County, Texas
Avg Annual Temp
71.4°F
Annual Precip
53.7"
Annual Snowfall
0.2"
Extreme Heat Days
65.93333333333334
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Galveston County Weather
Coastal warmth in a humid subtropical zone
Galveston County maintains an average annual temperature of 71.4°F, significantly warmer than the national median. This maritime climate stays much milder than the interior U.S., rarely seeing the sharp freezes typical of northern latitudes.
Warmer and wetter than the Texas average
The county's 71.4°F annual average sits nearly six degrees above the Texas state average of 65.5°F. It also receives 53.7 inches of rain annually, far outpacing the state average of 31.9 inches.
A maritime outlier in the Gulf region
Galveston stays warmer in winter than inland neighbors like Harris County, thanks to the Gulf of Mexico's insulating effect. Its 55.4°F January average provides a gentler winter than most counties in the upper Texas coast.
Mild winters and humid, steady summers
Summer temperatures average 84.2°F with 66 days of heat reaching 90°F or higher. Snow is almost non-existent at just 0.2 inches annually, while winter temperatures stay comfortable with a 57.3°F average.
Prepare for high humidity and tropical rain
Residents should invest in high-efficiency dehumidifiers and robust HVAC systems to manage the intense coastal moisture. With over 53 inches of annual rain, flood preparation and reliable rain gear are essential year-round.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.