County Forecast for Merrill , IA
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170300-
Plymouth-
Including the city of Le Mars
238 PM CDT Sat May 16 2026

Tonight   Mostly cloudy. A slight chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Lows in the upper 50s. East winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 80 percent.
Sunday   Mostly cloudy in the morning, then becoming partly sunny. A chance of showers with a slight chance of thunderstorms. Breezy and more humid with highs in the upper 80s. Southeast winds 15 to 25 mph with gusts up to 35 mph. Chance of rain 50 percent.
Sunday night   Showers with thunderstorms likely in the evening, then a chance of showers and thunderstorms after midnight. Some thunderstorms may be severe in the evening. Breezy with lows in the lower 50s. South winds 20 to 25 mph with gusts up to 35 mph, becoming northwest around 10 mph with gusts up to 20 mph after midnight. Chance of rain 80 percent.
Monday   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. Not as warm with highs in the upper 60s. North winds 10 to 15 mph. Chance of rain 70 percent.
Monday night   Showers with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 40s. North winds 15 to 20 mph with gusts up to 30 mph. Chance of rain near 100 percent.
Tuesday   Mostly cloudy in the morning, then becoming partly sunny. Breezy, cooler with highs in the upper 50s.
Tuesday night   Mostly cloudy in the evening, then becoming partly cloudy. Lows in the upper 30s.
Wednesday   Partly sunny. Highs in the lower 60s.
Wednesday night   Partly cloudy. Lows in the lower 40s.
Thursday   Partly sunny. Highs in the upper 60s.
Thursday night   Mostly cloudy in the evening, then becoming partly cloudy. Lows in the mid 40s.
Friday   Mostly cloudy in the morning, then becoming mostly sunny. Highs in the lower 70s.
Friday night   Partly cloudy in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows around 50. Chance of rain 30 percent.
Saturday   Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 30 percent.
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DTN Weather Summary

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Bryce Anderson – DTN Meteorologist
Major Storm, Heavy Rain, Severe Weather for Central US This Weekend

Stalled boundary triggers central U.S. storms Friday; severe weather risk expands through the weekend.​​​​​​​​​​​​​​​​ » More DTN Weather Commentary

Posted at 11:32AM Sat May 16, 2026 CDT
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