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Sig Field, IA Weather Forecast
Sig Field, IA Weather Forecast Date: 213 PM CDT Mon Aug 10 2026
The area/counties/county of: Poweshiek, including the city of Grinnell.or toggle through each period.
Tonight... Mostly sunny, then becoming mostly clear this evening, then becoming partly cloudy. A slight chance of showers and thunderstorms early. A slight chance of showers and thunderstorms after midnight. Humid with lows around 70. South winds 5 to 10 mph, becoming southeast. Chance of rain 20%. Heat index values up to 100 early early.
Tuesday... Partly sunny with a slight chance of showers and thunderstorms in the morning, then sunny in the afternoon. Humid with highs in the upper 80s. Southeast winds around 5 mph, becoming southwest in the afternoon. Chance of rain 20%.
Tuesday Night... Partly cloudy in the evening, then mostly cloudy with a chance of showers with a slight chance of thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 30%.
Wednesday... Mostly sunny. A chance of showers and thunderstorms in the morning. Humid with highs in the mid 80s. East winds around 5 mph. Chance of rain 50%.
Wednesday Night... Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 50%.
Thursday... A chance of thunderstorms. Showers. Highs around 80. Chance of rain 80%.
Thursday Night... Showers likely with a chance of thunderstorms. Lows in the mid 60s. Chance of rain 70%.
Friday... Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 70s. Chance of rain 50%.
Friday Night... Mostly cloudy with a chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 60s. Chance of rain 60%.
Saturday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms, mainly in the morning. Highs in the lower 80s. Chance of rain 50%.
Saturday Night... Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Lows in the mid 60s. Chance of rain 50%.
Sunday... Mostly cloudy with a chance of showers and thunderstorms in the morning, then partly sunny with a slight chance of showers in the afternoon. Highs around 80. Chance of rain 50%.
Sunday Night... Mostly cloudy in the evening, then becoming partly cloudy. A 20% chance of showers. Lows in the lower 60s.
POP = Probability of Precipitation
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