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Frethem Lake, MN Weather Forecast
Frethem Lake, MN Weather Forecast Date: 337 PM CDT Fri Aug 21 2026
The area/counties/county of: Mahnomen, including the city of Mahnomen.or toggle through each period.
This Afternoon... Mostly sunny. Highs 80 to 85. Northwest winds around 15 mph.
Tonight... Mostly clear. Patchy fog after midnight. Lows 50 to 55. North winds 5 to 15 mph.
Saturday... Sunny. Highs in the mid 70s. North winds 5 to 15 mph.
Saturday Night... Mostly clear. Lows 45 to 50.
Sunday... Sunny. Highs 75 to 80.
Sunday Night... Partly cloudy. Highs 80 to 85. Lows in the mid 50s.
Monday... Partly cloudy. Highs 80 to 85. Lows in the mid 50s.
Monday Night... Partly cloudy. A chance of showers and a slight chance of thunderstorms. Lows 60 to 65.
Tuesday... Mostly sunny. A slight chance of showers. Highs 80 to 85.
Tuesday Night... Mostly clear. Lows in the mid 50s.
Wednesday... Partly sunny. A slight chance of showers. Highs 75 to 80.
Wednesday Night... Mostly clear. Lows in the mid 50s.
POP = Probability of Precipitation
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