Jefferson County Climate
Jefferson County, Texas
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
69.4°F
Annual Precip
62.2"
Annual Snowfall
0.1"
Extreme Heat Days
95
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
9b
Minimum winter temperature range for plant survival
7,315
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Jefferson County
Climate Verdict
Jefferson County has a warm, averaging 69.4°F year-round, very wet conditions receiving 62.2 inches of precipitation annually, significant summer heat with 94.53333333333335 days annually above 90°F, light snow averaging 0.1 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 52.9°F. summers are hot, with July averaging 83.5°F. The 31°F seasonal variation provides noticeable but manageable change. January is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Jefferson County is 4.0°F warmer than the Texas statewide average of 65.5°F, it is also noticeably wetter, receiving 30.4 inches more precipitation than the state average.
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 sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.