Climate change in Powder River County, Montana
Since 1979, Powder River County, Montana has warmed 1.6°F, with 14 more days above 90°F, about the same number of nights above 70°F and 24% more precipitation a year. Its climate in 1996–2025 is most like Fall River County, SD's was in 1951–1980.
- Average temperature: +1.6°F
- Summer highs (Jun–Aug): +2.8°F
- Winter lows (Dec–Feb): +2.2°F
- Precipitation: +24%
- Wettest day of the year: +8%
- Longest dry spell: −11 days
- Days above 90°F: +14 days
- Nights above 70°F: +0 days
- Freezing nights: −6 days
- Frost-free season: +18 days
- Muggy days: +0 days
- Summer heat index (Jun–Aug): +2.8°F
- Extreme fire-weather days: +7 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.