| NWS Forecast for: Lewistown MT Issued by: National Weather Service Great Falls, MT Last Update: 2:23 pm MDT Jul 14, 2025 | |
| Tonight: A chance of showers and thunderstorms, then showers likely after 3am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 50. North northeast wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. Tuesday: Showers, with thunderstorms also possible after 9am. Patchy fog before 8am. High near 57. Northeast wind 8 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible. Tuesday Night: Showers and possibly a thunderstorm. Patchy fog after midnight. Low around 45. Northeast wind 6 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible. Wednesday: A 50 percent chance of showers. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 64. East northeast wind 6 to 9 mph. Wednesday Night: Partly cloudy, with a low around 42. East southeast wind 6 to 9 mph. Thursday: Sunny, with a high near 80. South southeast wind 5 to 7 mph becoming east northeast in the afternoon. Thursday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 49. East northeast wind 5 to 8 mph becoming light and variable after midnight. Friday: Mostly sunny, with a high near 76. Light and variable wind becoming north northwest 5 to 7 mph in the morning. Friday Night: Mostly clear, with a low around 51. Saturday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 84. Saturday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54. Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Sunday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 53. Monday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80. | |
| Lewistown MT 47.07°N 109.43°W (Elev. 3898 ft) | |
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