Johnson County Climate
Johnson County, Georgia
Avg Annual Temp
64.0°F
Annual Precip
49.0"
Annual Snowfall
—
Extreme Heat Days
93.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Johnson County Weather
Searing Heat Relative to Nation
With an annual average of 64.0°F, Johnson County is significantly warmer than the national median. Its climate is dominated by high-temperature extremes.
Warmer Than State Averages
Johnson's 64.0°F average exceeds the Georgia state mean of 63.7°F. This extra warmth translates to more frequent extreme heat events.
The Regional Heat Leader
Johnson stands out with 94 extreme heat days, far more than Jefferson County's 79 days. It also receives 49.0 inches of rain, making it a hot and humid regional hub.
Nearly 100 Heat Days
The county experiences 94 days reaching 90°F or more, nearly a quarter of the year. Snowfall data is unavailable, but the 47.8°F winter average suggests frozen precipitation is rare.
Extreme Heat Precautions Needed
Ninety-four days of 90-degree weather demand high-performance HVAC and ample hydration for outdoor workers. Residents should plan for heavy summer utility costs due to the extended 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.