Climate change in Roberts County, South Dakota
Since 1979, Roberts County, South Dakota has warmed 1.8°F, with 3 fewer days above 90°F, about the same number of nights above 70°F and 20% more precipitation a year. Its climate in 1996–2025 is most like Lyon County, MN's was in 1951–1980.
- Average temperature: +1.8°F
- Summer highs (Jun–Aug): +0.4°F
- Winter lows (Dec–Feb): +3.2°F
- Precipitation: +20%
- Wettest day of the year: +25%
- Longest dry spell: −8 days
- Days above 90°F: −3 days
- Nights above 70°F: −0 days
- Freezing nights: −10 days
- Frost-free season: +18 days
- Muggy days: +7 days
- Summer heat index (Jun–Aug): +1.3°F
- Extreme fire-weather days: +1 days
- Snowfall: +25%
- Snowy days (1 inch or more): +1 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.