Climate change in Johnson County, Tennessee
Since 1979, Johnson County, Tennessee has warmed 2.7°F, with about the same number of days above 90°F, about the same number of nights above 70°F and 13% more precipitation a year. Its climate in 1996–2025 is most like Carter County, TN's was in 1951–1980.
- Average temperature: +2.7°F
- Summer highs (Jun–Aug): +1.6°F
- Winter lows (Dec–Feb): +4.9°F
- Precipitation: +13%
- Wettest day of the year: +36%
- Longest dry spell: −1 days
- Days above 90°F: −0 days
- Nights above 70°F: +0 days
- Freezing nights: −18 days
- Frost-free season: +27 days
- Muggy days: +8 days
- Summer heat index (Jun–Aug): +2.2°F
- Extreme fire-weather days: +5 days
- Snowfall: −62%
- Snowy days (1 inch or more): −6 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.