Jefferson County Climate
Jefferson County, Alabama
Avg Annual Temp
63.0°F
Annual Precip
57.7"
Annual Snowfall
0.8"
Extreme Heat Days
69.63333333333334
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.