Climate change in Garfield County, Montana
Since 1979, Garfield County, Montana has warmed 1.6°F, with 5 more days above 90°F, about the same number of nights above 70°F and 33% more precipitation a year. Its climate in 1996–2025 is most like Butte County, SD's was in 1951–1980.
- Average temperature: +1.6°F
- Summer highs (Jun–Aug): +1.8°F
- Winter lows (Dec–Feb): +2.8°F
- Precipitation: +33%
- Wettest day of the year: +35%
- Longest dry spell: −4 days
- Days above 90°F: +5 days
- Nights above 70°F: +0 days
- Freezing nights: −9 days
- Frost-free season: +14 days
- Muggy days: −0 days
- Summer heat index (Jun–Aug): +1.9°F
- Extreme fire-weather days: +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.