| NWS Forecast for: Lewistown MT Issued by: National Weather Service Great Falls, MT Last Update: 12:32 pm MDT Jun 11, 2026 | |
| Tonight: Mostly clear, with a low around 40. West northwest wind 8 to 13 mph becoming light and variable after midnight. Winds could gust as high as 22 mph. Friday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 65. Light and variable wind becoming northwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph. Friday Night: Showers and thunderstorms likely before 5am, then a chance of showers. Cloudy, with a low around 39. Northwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. Saturday: A 40 percent chance of showers before noon. Partly sunny, with a high near 57. Northwest wind 11 to 14 mph, with gusts as high as 23 mph. Saturday Night: Partly cloudy, with a low around 36. Northwest wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 20 mph. Sunday: Sunny, with a high near 66. Calm wind becoming north northwest around 6 mph in the afternoon. Sunday Night: Partly cloudy, with a low around 41. North northwest wind 5 to 7 mph becoming calm in the evening. Monday: Mostly sunny, with a high near 69. Light and variable wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Monday Night: Mostly cloudy, with a low around 49. Tuesday: Partly sunny, with a high near 77. Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 71. Wednesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48. Thursday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 72. | |
| Lewistown MT 47.07°N 109.43°W (Elev. 3898 ft) | |
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