| National Weather Service Forecast for:
Lewistown MT Issued by: National Weather Service Great Falls, MT |
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| Updated: 10:52 am MDT Oct 6, 2026 | ||||||||||||||||||
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| This Afternoon |
Sunny, with a high near 78. West northwest wind 5 to 8 mph, with gusts as high as 18 mph. |
| Tonight |
Partly cloudy, with a low around 46. Southwest wind around 5 mph becoming calm in the evening. |
| Wednesday |
Mostly sunny, with a high near 73. Calm wind becoming east northeast around 6 mph in the afternoon. |
| Wednesday Night |
Partly cloudy, with a low around 42. East southeast wind 5 to 7 mph becoming light and variable after midnight. |
| Thursday |
Mostly sunny, with a high near 75. Light and variable wind. |
| Thursday Night |
Partly cloudy, with a low around 48. Calm wind becoming south 5 to 9 mph in the evening. |
| Friday |
Mostly sunny, with a high near 82. South southwest wind 9 to 17 mph, with gusts as high as 28 mph. |
| Friday Night |
Partly cloudy, with a low around 44. West wind 8 to 10 mph, with gusts as high as 18 mph. |
| Saturday |
A chance of rain. Partly sunny, with a high near 57. |
| Saturday Night |
Rain and snow, becoming all snow after 3am. Cloudy, with a low around 24. |
| Sunday |
Snow. Cloudy, with a high near 40. |
| Sunday Night |
Snow likely. Mostly cloudy, with a low around 22. |
| Columbus Day |
A chance of rain and snow. Partly sunny, with a high near 47. |
Forecast from NOAA-NWS for Lewistown MT.
