Climate change in Montgomery County, Missouri
Since 1979, Montgomery County, Missouri has warmed 2.3°F, with 4 more days above 90°F, 5 more nights above 70°F and about the same precipitation a year. Its climate in 1996–2025 is most like Washington County, IL's was in 1951–1980.
- Average temperature: +2.3°F
- Summer highs (Jun–Aug): −0.1°F
- Winter lows (Dec–Feb): +3.6°F
- Precipitation: +0%
- Wettest day of the year: −9%
- Longest dry spell: −8 days
- Days above 90°F: +4 days
- Nights above 70°F: +5 days
- Freezing nights: −15 days
- Frost-free season: +7 days
- Muggy days: +9 days
- Summer heat index (Jun–Aug): +1.3°F
- Extreme fire-weather days: +0 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.