| NWS Forecast for: St Mary MT Issued by: National Weather Service Great Falls, MT Last Update: 10:41 pm MDT Oct 12, 2026 | |
| Tonight: Mostly clear, with a steady temperature around 28. Southwest wind 11 to 13 mph, with gusts as high as 20 mph. Tuesday: Sunny, with a high near 44. Southwest wind 8 to 11 mph. Tuesday Night: Partly cloudy, with a low around 28. Southwest wind 9 to 14 mph, with gusts as high as 23 mph. Wednesday: Mostly sunny, with a high near 45. West southwest wind 10 to 14 mph, with gusts as high as 26 mph. Wednesday Night: Partly cloudy, with a low around 30. West southwest wind 5 to 7 mph becoming calm after midnight. Thursday: Mostly sunny, with a high near 53. Calm wind becoming south southeast around 5 mph in the afternoon. Thursday Night: Partly cloudy, with a low around 34. South wind 3 to 7 mph. Friday: Sunny, with a high near 60. Southwest wind 9 to 11 mph, with gusts as high as 24 mph. Friday Night: Partly cloudy, with a low around 44. Saturday: Mostly sunny, with a high near 61. Saturday Night: Partly cloudy, with a low around 35. Sunday: Mostly sunny, with a high near 57. Sunday Night: Partly cloudy, with a low around 35. Monday: Partly sunny, with a high near 58. | |
| St Mary MT 48.74°N 113.44°W (Elev. 4554 ft) | |
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