| National Weather Service Forecast for:
Lewistown MT Issued by: National Weather Service Great Falls, MT |
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| Updated: 10:07 pm MST Dec 22, 2025 | ||||||||||||||||||
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| Tonight |
Mostly cloudy, with a low around 25. East southeast wind around 6 mph. |
| Tuesday |
A slight chance of rain between 11am and 2pm. Mostly cloudy, with a high near 46. South southeast wind 3 to 6 mph. Chance of precipitation is 20%. |
| Tuesday Night |
Mostly cloudy, with a steady temperature around 37. Southeast wind around 7 mph. |
| Wednesday |
Partly sunny, with a high near 52. South southeast wind 7 to 10 mph, with gusts as high as 18 mph. |
| Wednesday Night |
A chance of rain after 11pm, mixing with snow after 2am. Mostly cloudy, with a low around 28. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible. |
| Christmas Day |
A slight chance of rain and snow before 11am. Mostly cloudy, with a high near 47. Southwest wind 3 to 7 mph. Chance of precipitation is 20%. |
| Thursday Night |
A 10 percent chance of rain after 5am. Mostly cloudy, with a low around 31. South wind around 7 mph. |
| Friday |
A slight chance of rain and snow before 11am, then a slight chance of rain after 5pm. Partly sunny, with a high near 47. South southwest wind 7 to 16 mph, with gusts as high as 28 mph. |
| Friday Night |
A slight chance of rain and snow before 8pm, then a slight chance of snow. Mostly cloudy, with a low around 13. |
| Saturday |
Partly sunny, with a high near 29. |
| Saturday Night |
Partly cloudy, with a low around 16. |
| Sunday |
Partly sunny, with a high near 44. |
| Sunday Night |
Mostly clear, with a low around 28. |
| Monday |
Mostly sunny, with a high near 52. |
Forecast from NOAA-NWS for Lewistown MT.