National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

Lat: 40.09°NLon: 105.92°WElev: 8207ft.

Overcast

61°F

16°C

Humidity 40%
Wind Speed Calm
Barometer 30.32 in
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 29 Sep 3:15 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 51. Southeast wind around 5 mph becoming west northwest. Chance of precipitation is 80%.

    High: 51 °F

    Showers

  • Tonight

    Tonight: A 40 percent chance of showers before 9pm. Cloudy during the early evening, then gradual clearing, with a low around 38. West wind 5 to 10 mph, with gusts as high as 16 mph.

    Low: 38 °F

    Chance
    Showers then
    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 53. West northwest wind 5 to 11 mph becoming east in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    High: 53 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 37. Light west wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 25 mph.

    Low: 37 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 54. West wind 5 to 14 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 54 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers after noon. Mostly sunny, with a high near 58.

    High: 58 °F

    Sunny then
    Slight Chance
    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 51. Southeast wind around 5 mph becoming west northwest. Chance of precipitation is 80%.
Tonight
A 40 percent chance of showers before 9pm. Cloudy during the early evening, then gradual clearing, with a low around 38. West wind 5 to 10 mph, with gusts as high as 16 mph.
Tuesday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 53. West northwest wind 5 to 11 mph becoming east in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 37. Light west wind increasing to 9 to 14 mph in the evening. Winds could gust as high as 25 mph.
Wednesday
Sunny, with a high near 54. West wind 5 to 14 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Sunny, with a high near 59.
Thursday Night
Mostly clear, with a low around 41.
Friday
A slight chance of showers after noon. Mostly sunny, with a high near 58.
Friday Night
A chance of rain showers before midnight, then a chance of rain and snow showers. Mostly cloudy, with a low around 37.
Saturday
A chance of rain and snow showers. Some thunder is also possible. Partly sunny, with a high near 49.
Saturday Night
A chance of rain and snow showers. Partly cloudy, with a low around 33.
Sunday
A chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.63°W (Elev. 10735 ft)
Last Update:
2:11 pm MDT Sep 29, 2025
Forecast Valid:
3pm MDT Sep 29, 2025-6pm MDT Oct 5, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation