County Forecast for Merrill , IA
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080400-
Plymouth-
Including the city of Le Mars
344 PM CDT Mon Sep 7 2026

Tonight   Mostly cloudy. Showers likely with a chance of thunderstorms after midnight. Lows in the lower 70s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 60 percent.
Tuesday   Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the morning, then showers likely with a chance of thunderstorms in the afternoon. Humid with highs in the mid 80s. South winds 10 to 15 mph, becoming southwest 5 to 10 mph in the afternoon. Chance of rain 60 percent.
Tuesday night   Partly cloudy. A chance of showers and thunderstorms in the evening. Humid with lows in the lower 60s. West winds around 5 mph, becoming north after midnight. Chance of rain 50 percent.
Wednesday   Sunny. Highs in the upper 70s. Northwest winds 5 to 10 mph.
Wednesday night   Mostly clear. Lows in the mid 50s. Northwest winds around 5 mph in the evening, becoming light and variable.
Thursday   Sunny. Highs in the lower 80s.
Thursday night   Mostly clear. Lows in the lower 60s.
Friday   Mostly sunny. A chance of showers in the afternoon. Highs in the mid 80s. Chance of rain 30 percent.
Friday night   Mostly clear. Lows in the lower 60s.
Saturday   Sunny. Highs in the upper 70s.
Saturday night   Mostly clear in the evening, then partly cloudy with a chance of showers and thunderstorms after midnight. Lows in the mid 50s. Chance of rain 40 percent.
Sunday   Partly sunny with a chance of showers. Highs in the mid 70s. Chance of rain 40 percent.
Sunday night   Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the mid 50s. Chance of rain 60 percent.
Monday   Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. Highs in the lower 70s. Chance of rain 50 percent.
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Bryce Anderson – DTN Meteorologist
Hot and Dry for Central US Labor Day Weekend

Hot, humid conditions persist through the holiday weekend with scattered showers and thunderstorms likely. » More DTN Weather Commentary

Posted at 11:59AM Fri Sep 4, 2026 CDT
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