Johnson County Climate
Johnson County, Georgia
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
64.0°F
Annual Precip
49.0"
Annual Snowfall
—
Extreme Heat Days
94
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,690
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Johnson County
Climate Verdict
Johnson County has a warm, averaging 64.0°F year-round, moderately wet with 49.0 inches of annual precipitation, significant summer heat with 93.5 days annually above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 46.2°F. summers are hot, with July averaging 81.3°F. The 35°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Johnson County closely matches the Georgia statewide average temperature of 63.7°F, it is somewhat drier than average for Georgia, the county experiences 28.520054200541992 more extreme heat days than the state average.
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 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.