Climate change in Harrison County, Missouri
Since 1979, Harrison County, Missouri has warmed 2.2°F, with 1 more days above 90°F, about the same number of nights above 70°F and 4% more precipitation a year. Its climate in 1996–2025 is most like Clinton County, MO's was in 1951–1980.
- Average temperature: +2.2°F
- Summer highs (Jun–Aug): +0.4°F
- Winter lows (Dec–Feb): +2.6°F
- Precipitation: +4%
- Wettest day of the year: +57%
- Longest dry spell: −6 days
- Days above 90°F: +1 days
- Nights above 70°F: +0 days
- Freezing nights: −8 days
- Frost-free season: +12 days
- Muggy days: +13 days
- Summer heat index (Jun–Aug): +1.6°F
- Extreme fire-weather days: +2 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.