Jefferson County Climate
Jefferson County, Texas
Avg Annual Temp
69.4°F
Annual Precip
62.2"
Annual Snowfall
0.1"
Extreme Heat Days
94.53333333333336
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Jefferson County Weather
Extreme Rainfall and Coastal Warmth
Jefferson County is one of the warmest and wettest spots in the country, averaging 69.4°F and 62.2 inches of rain. This puts it far above national averages for both temperature and precipitation.
A Leader in Texas Rainfall Totals
With 62.2 inches of rain, Jefferson County receives nearly double the Texas average of 31.9 inches. Its 69.4°F average temperature also makes it significantly warmer than the state median.
Tropical Conditions Along the Gulf Coast
The county's climate is much wetter than its inland neighbors, and it records almost no snow at 0.1 inches. It shares the humid, storm-prone profile typical of the upper Texas coast.
Long, Hot Summers and Warm Winters
Summer heat persists for 95 days above 90°F, with July temperatures averaging 83.5°F. Winter is barely felt, with an average temperature of 54.8°F and virtually no snowfall.
Prepare for Intense Rain and Humidity
Homeowners must prioritize flood preparedness and mold prevention given the 62.2 inches of annual rainfall. Robust cooling and dehumidification are essential to navigate the 95 days of extreme heat.
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.