Climate change in Delta County, Michigan
Since 1979, Delta County, Michigan has warmed 2.1°F, with about the same number of days above 90°F, about the same number of nights above 70°F and 10% more precipitation a year. Its climate in 1996–2025 is most like Charlevoix County, MI's was in 1951–1980.
- Average temperature: +2.1°F
- Summer highs (Jun–Aug): +1.5°F
- Winter lows (Dec–Feb): +4.2°F
- Precipitation: +10%
- Wettest day of the year: +2%
- Longest dry spell: −3 days
- Days above 90°F: −0 days
- Nights above 70°F: +0 days
- Freezing nights: −4 days
- Frost-free season: +6 days
- Muggy days: −0 days
- Summer heat index (Jun–Aug): +1.7°F
- Extreme fire-weather days: +11 days
Changes follow the trend line through every year from 1979 to 2025. Data: NOAA nClimGrid-Daily; humidity from gridMET, adjusted to airport observations.