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Portland, IA 7-Day Night Weather Forecast
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Portland, IA Weather Forecast
Portland, IA Weather Forecast Date: 703 PM CDT Fri Aug 07 2026
The area/counties/county of: Cerro Gordo, including the cities of: Mason City and Clear Lake.or toggle through each period.
Tonight... Partly cloudy with a slight chance of showers and thunderstorms this evening, then mostly clear after midnight. Lows in the mid 50s. Northwest winds 5 to 10 mph. Chance of rain 20%.
Saturday... Sunny. Highs in the upper 70s. North winds around 5 mph, becoming south in the afternoon.
Saturday Night... Partly cloudy. Showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. South winds 5 to 10 mph. Chance of rain 60%.
Sunday... Partly sunny. A chance of showers and thunderstorms in the morning. Humid with highs in the mid 80s. South winds 5 to 10 mph. Chance of rain 50%.
Sunday Night... Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with showers likely with a chance of thunderstorms after midnight. Humid with lows in the mid 60s. East winds around 5 mph. Chance of rain 60%.
Monday... Mostly cloudy with a chance of showers and thunderstorms in the morning, then mostly sunny in the afternoon. Highs in the lower 80s. Chance of rain 30%.
Monday Night... Partly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 50%.
Tuesday... Mostly cloudy in the morning, then becoming partly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 70s. Chance of rain 50%.
Tuesday Night... Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 60s. Chance of rain 30%.
Wednesday... Partly sunny. Highs in the upper 70s.
Wednesday Night... Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the upper 50s. Chance of rain 20%.
Thursday... Partly sunny. Highs in the mid 70s.
Thursday Night... Partly cloudy. A slight chance of showers after midnight. Lows in the upper 50s. Chance of rain 20%.
POP = Probability of Precipitation
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