| NWS Forecast for: 3 Miles W Saint Marys Glacier CO Issued by: National Weather Service Denver-Boulder, CO Last Update: 12:46 pm MDT Sep 12, 2026 | |
| Tonight: Mostly clear, with a low around 39. Breezy, with a west wind around 16 mph, with gusts as high as 25 mph. Sunday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 57. Breezy, with a west southwest wind 7 to 15 mph, with gusts as high as 24 mph. Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 41. Breezy, with a west wind 9 to 14 mph becoming west 16 to 21 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 30%. Monday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 50. Windy, with a west wind 21 to 28 mph, with gusts as high as 41 mph. Chance of precipitation is 40%. Monday Night: A slight chance of rain showers before 9pm, then a chance of rain and snow showers between 9pm and 3am, then a chance of rain showers after 3am. Some thunder is also possible. Mostly cloudy, with a low around 35. Breezy, with a west wind 15 to 20 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 40%. Tuesday: A slight chance of showers, then showers and possibly a thunderstorm after noon. High near 47. Chance of precipitation is 90%. Tuesday Night: Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 36. Chance of precipitation is 60%. Wednesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 50. Wednesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 35. Thursday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 47. Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 34. Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 46. Friday Night: A slight chance of showers. Mostly clear, with a low around 33. Saturday: A chance of showers and thunderstorms. Mostly sunny, with a high near 47. | |
| 3 Miles W Saint Marys Glacier CO 39.84°N 105.69°W (Elev. 12507 ft) | |
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