| National Weather Service Forecast for:
Lewistown MT Issued by: National Weather Service Great Falls, MT |
||||||||||||||||||
| Updated: 3:27 am MST Dec 22, 2025 | ||||||||||||||||||
|
| Today |
A 40 percent chance of rain between 9am and 11am. Cloudy, then gradually becoming mostly sunny, with a high near 46. Southwest wind 6 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph. |
| Tonight |
Mostly cloudy, with a low around 28. Light and variable wind becoming east southeast around 6 mph in the evening. |
| Tuesday |
Mostly cloudy, with a high near 49. South wind around 6 mph. |
| Tuesday Night |
Mostly cloudy, with a low around 33. South wind around 6 mph. |
| Wednesday |
Partly sunny, with a high near 55. South wind 6 to 10 mph, with gusts as high as 18 mph. |
| Wednesday Night |
A chance of rain between 11pm and 2am, then a chance of freezing rain after 2am. Cloudy, with a low around 27. West wind 5 to 8 mph. Chance of precipitation is 50%. |
| Christmas Day |
A chance of freezing rain before 10am, then a chance of rain. Mostly cloudy, with a high near 41. Light and variable wind becoming north northeast around 6 mph in the afternoon. Chance of precipitation is 40%. |
| Thursday Night |
A slight chance of freezing rain before 11pm, then a slight chance of rain after 5am. Mostly cloudy, with a low around 28. South wind around 7 mph. |
| Friday |
A slight chance of rain and snow before 8am, then a slight chance of snow between 8am and 11am. Mostly cloudy, with a high near 44. |
| Friday Night |
Mostly cloudy, with a low around 19. |
| Saturday |
Partly sunny, with a high near 37. |
| Saturday Night |
Partly cloudy, with a low around 24. |
| Sunday |
Partly sunny, with a high near 46. |
Forecast from NOAA-NWS for Lewistown MT.