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St. Peter, MI Weather Forecast
St. Peter, MI Weather Forecast Date: 337 PM EDT Sat Sep 19 2026
The area/counties/county of: Ionia, including the city of Ionia.or toggle through each period.
Through Early Evening... Cloudy with a chance of rain showers and a slight chance of thunderstorms. Highs in the mid 60s. East winds around 10 mph with gusts to around 20 mph. Chance of rain 50%.
Tonight... Rain showers and a chance of thunderstorms. Lows in the upper 50s. East winds 5 to 10 mph. Gusts up to 20 mph in the evening. Chance of rain 90%.
Sunday... Rain showers likely in the morning, then a slight chance of rain showers in the afternoon. Highs in the upper 60s. Northeast winds 5 to 15 mph with gusts to around 25 mph. Chance of rain 60%.
Sunday Night... Partly cloudy. Lows in the upper 40s. Northeast winds 10 to 15 mph with gusts to around 30 mph.
Monday... Mostly cloudy. Highs in the lower 60s. Northeast winds 10 to 15 mph with gusts to around 30 mph.
Monday Night... Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s. Northeast winds 10 to 15 mph. Gusts up to 30 mph in the evening.
Tuesday... Partly sunny. Highs in the lower 60s.
Tuesday Night... Mostly cloudy in the evening then becoming partly cloudy. A 20% chance of rain showers. Lows in the upper 40s.
Wednesday... Mostly cloudy with a 40% chance of rain showers. Highs in the lower 60s.
Wednesday Night... Mostly cloudy in the evening then becoming partly cloudy. A 20% chance of rain showers. Lows in the upper 40s.
Thursday... Partly sunny. Highs in the mid 60s.
Thursday Night... Partly cloudy. Lows in the upper 40s.
Friday... Partly sunny. Highs around 70.
Friday Night... Partly cloudy. Lows in the upper 40s.
POP = Probability of Precipitation
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