Jefferson County Climate
Jefferson County, Alabama
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
63.0°F
Annual Precip
57.7"
Annual Snowfall
0.8"
Extreme Heat Days
70
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8a
Minimum winter temperature range for plant survival
5,496
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 63.0°F year-round, very wet conditions receiving 57.7 inches of precipitation annually, significant summer heat with 69.63333333333334 days annually above 90°F, light snow averaging 0.8 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 43.9°F. summers are hot, with July averaging 80.7°F. The 37°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Jefferson County closely matches the Alabama statewide average temperature of 63.2°F.
Climate Profile
About Jefferson County Weather
Classic southern heat and humidity
Jefferson County’s 63.0°F average temperature almost perfectly mirrors the Alabama state average. It sits well above the national median, reflecting a standard humid subtropical environment.
The benchmark for Alabama weather
This central county represents the Alabama middle ground, nearly matching the state's thermal and precipitation averages. Annual rainfall of 57.7 inches closely follows the 57.4-inch state norm.
Warmer than its northern neighbors
It is slightly cooler than Lamar County to the west but sees significantly more extreme heat days than Jackson County to the north. Precipitation levels remain consistent across this central Alabama corridor.
Intense summers and mild winters
Summers are intense with 70 days hitting 90°F or higher and a July average of 80.7°F. Winters are mild at 46.1°F, though the county still sees about 0.8 inches of snow.
Budget for peak summer cooling
Expect high electricity bills in mid-summer to combat over two full months of extreme heat. Seasonal wardrobe transitions are necessary as winter temperatures regularly drop into the low 40s.
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.