| NWS Forecast for: Lewistown MT Issued by: National Weather Service Great Falls, MT Last Update: 3:03 pm MDT Mar 16, 2026 |  |
This Afternoon: Mostly cloudy, with a steady temperature around 42. West southwest wind 7 to 9 mph, with gusts as high as 20 mph. Tonight: A 40 percent chance of rain, mainly before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 37. West wind 9 to 14 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 33 mph. Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 55. Breezy, with a west wind 21 to 26 mph, with gusts as high as 40 mph. Tuesday Night: Partly cloudy, with a low around 40. Breezy, with a west wind 14 to 22 mph, with gusts as high as 36 mph. Wednesday: Mostly cloudy, with a high near 60. West southwest wind 11 to 21 mph, with gusts as high as 33 mph. Wednesday Night: Partly cloudy, with a low around 40. West southwest wind 10 to 16 mph, with gusts as high as 28 mph. Thursday: Partly sunny, with a high near 67. West southwest wind 10 to 18 mph, with gusts as high as 29 mph. Thursday Night: Mostly cloudy, with a low around 46. West southwest wind 13 to 16 mph, with gusts as high as 28 mph. Friday: Partly sunny, with a high near 70. Breezy. Friday Night: A slight chance of rain after midnight. Mostly cloudy, with a low around 40. Saturday: A chance of rain. Partly sunny, with a high near 58. Saturday Night: A slight chance of rain and snow. Partly cloudy, with a low around 28. Sunday: A slight chance of rain and snow. Mostly sunny, with a high near 51. Sunday Night: Partly cloudy, with a low around 29. Monday: A slight chance of rain. Partly sunny, with a high near 54. | |
| Lewistown MT 47.07°N 109.43°W (Elev. 3898 ft) | |
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