| NWS Forecast for: Thief River Falls MN Issued by: National Weather Service Grand Forks, ND Last Update: 7:36 pm CDT Apr 21, 2026 |  |
| Tonight: Mostly clear, with a low around 45. South southeast wind 8 to 10 mph. Wednesday: Increasing clouds, with a high near 78. South wind 10 to 18 mph, with gusts as high as 28 mph. Wednesday Night: A 30 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 60. Breezy, with a southeast wind 18 to 22 mph, with gusts as high as 33 mph. Thursday: A slight chance of rain, then a chance of rain and thunderstorms after 1pm. Mostly cloudy, with a high near 70. Breezy, with a south wind 21 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Thursday Night: A 30 percent chance of rain, mainly before 1am. Mostly cloudy, with a low around 40. South wind around 17 mph becoming west after midnight. Winds could gust as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible. Friday: A 20 percent chance of rain before 1pm. Mostly sunny, with a high near 51. Breezy, with a west wind 17 to 20 mph. Friday Night: Mostly cloudy, with a low around 31. West wind 9 to 15 mph. Saturday: Partly sunny, with a high near 50. Southwest wind 9 to 15 mph. Saturday Night: Partly cloudy, with a low around 34. West southwest wind 5 to 10 mph becoming east after midnight. Sunday: A 20 percent chance of rain after 1pm. Partly sunny, with a high near 53. East southeast wind 6 to 10 mph. Sunday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 38. East northeast wind 7 to 9 mph. Monday: A 30 percent chance of rain. Mostly cloudy, with a high near 50. East northeast wind 10 to 15 mph. Monday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 35. North wind 7 to 14 mph. Tuesday: Partly sunny, with a high near 51. Northwest wind 8 to 13 mph. | |
| Thief River Falls MN 48.13°N 96.19°W | |
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