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Sumner, MI Weather Forecast
Sumner, MI Weather Forecast Date: 222 PM EDT Tue Oct 20 2026
The area/counties/county of: Gratiot, including the city of Alma.or toggle through each period.
Through Early Evening... Sunny. Highs in the mid 60s. East winds around 5 mph.
Tonight... Clear in the evening then becoming partly cloudy. Lows in the lower 40s. Light winds.
Wednesday... Sunny. Highs in the upper 60s. Light winds.
Wednesday Night... Mostly clear. Lows in the lower 40s. Light winds.
Thursday... Sunny. Highs in the mid 60s. Light winds.
Thursday Night... Mostly clear. Lows in the upper 30s. Light winds.
Friday... Sunny. Highs in the mid 60s.
Friday Night... Mostly clear. Lows in the upper 30s.
Saturday... Mostly sunny. Highs in the upper 60s.
Saturday Night... Partly cloudy. Lows in the upper 40s.
Sunday... Mostly sunny in the morning then becoming partly sunny. Highs around 70.
Sunday Night... Partly cloudy. Lows in the mid 40s.
Monday... Partly sunny. Highs in the lower 60s.
Monday Night... Partly cloudy with a 20% chance of rain showers. Lows around 40.
POP = Probability of Precipitation
Sumner Radar Loop
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