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Lancaster, IA 7-Day Night Weather Forecast
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Lancaster, IA Weather Forecast
Lancaster, IA Weather Forecast Date: 456 AM CDT Thu Sep 17 2026
The area/counties/county of: Keokuk, including the city of Sigourney.or toggle through each period.
Today... Mostly cloudy. A chance of showers and thunderstorms early this morning. Areas of dense fog early this morning. Some thunderstorms May produce heavy rainfall early this morning. Humid with highs in the upper 70s. East winds around 5 mph, becoming north around 5 mph this afternoon. Chance of rain 40%.
Tonight... Mostly cloudy. Humid with lows in the mid 60s. Northeast winds around 5 mph.
Friday... Mostly cloudy. Showers likely with a chance of thunderstorms in the morning. Humid with highs around 80. Southeast winds around 10 mph. Chance of rain 70%.
Friday Night... Mostly cloudy. A chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Southeast winds around 10 mph. Chance of rain 50%.
Saturday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers in the morning. Humid with highs in the lower 80s. South winds 5 to 10 mph, becoming west with gusts up to 20 mph in the afternoon. Chance of rain 50%.
Saturday Night... Showers likely with a chance of thunderstorms. Lows in the lower 60s. Highs in the upper 60s. Chance of rain 60%.
Sunday... Showers likely with a chance of thunderstorms. Lows in the lower 60s. Highs in the upper 60s. Chance of rain 60%.
Sunday Night... A chance of thunderstorms in the evening. Showers likely. Lows in the upper 50s. Chance of rain 70%.
Monday... Showers likely, mainly in the morning. Highs in the mid 60s. Chance of rain 70%.
Monday Night... Mostly cloudy. Lows in the mid 50s. Highs in the mid 60s.
Tuesday... Mostly cloudy. Lows in the mid 50s. Highs in the mid 60s.
Tuesday Night... Partly cloudy. Lows in the lower 50s. Highs around 70.
POP = Probability of Precipitation
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