Climate change in Chouteau County, Montana
Since 1979, Chouteau County, Montana has warmed 1.1°F, with 8 more days above 90°F, about the same number of nights above 70°F and about the same precipitation a year. Its climate in 1996–2025 is most like Musselshell County, MT's was in 1951–1980.
- Average temperature: +1.1°F
- Summer highs (Jun–Aug): +2.5°F
- Winter lows (Dec–Feb): +2.3°F
- Precipitation: +0%
- Wettest day of the year: +1%
- Longest dry spell: −2 days
- Days above 90°F: +8 days
- Nights above 70°F: +0 days
- Freezing nights: −2 days
- Frost-free season: +9 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +2.2°F
- Extreme fire-weather days: +13 days
- Snowfall: −3%
- Snowy days (1 inch or more): −4 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.