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

Granby-Grand County Airport (KGNB)

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

Fair

53°F

12°C

Humidity 63%
Wind Speed W 7 mph
Barometer 30.02 in
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 11 Oct 10:35 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • Tonight

    Tonight: A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38. Windy, with a southwest wind 16 to 26 mph, with gusts as high as 43 mph.

    Low: 38 °F

    Slight Chance
    Showers and
    Breezy then
    Mostly Clear
    and Windy

  • Columbus Day

    Columbus Day: Sunny, with a high near 49. Breezy, with a west southwest wind 19 to 24 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 43 mph.

    High: 49 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 34. West southwest wind 6 to 10 mph, with gusts as high as 17 mph.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of snow showers before noon, then a chance of rain and snow showers between noon and 3pm, then a chance of rain showers after 3pm. Partly sunny, with a high near 43. West southwest wind 8 to 14 mph becoming east in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 43 °F

    Chance Snow
    Showers then
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Snow showers, possibly mixed with rain, becoming all snow after 3am. Low around 28. East wind around 9 mph, with gusts as high as 17 mph. Chance of precipitation is 80%.

    Low: 28 °F

    Rain/Snow

  • Wednesday

    Wednesday: Snow showers. Some thunder is also possible. High near 30. Chance of precipitation is 90%.

    High: 30 °F

    Snow Showers

  • Wednesday Night

    Wednesday Night: Snow showers, mainly before midnight. Some thunder is also possible. Low around 26. Chance of precipitation is 80%.

    Low: 26 °F

    Snow Showers
    then Chance
    Snow Showers

  • Thursday

    Thursday: A chance of snow showers. Partly sunny, with a high near 31.

    High: 31 °F

    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: A chance of snow showers. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38. Windy, with a southwest wind 16 to 26 mph, with gusts as high as 43 mph.
Columbus Day
Sunny, with a high near 49. Breezy, with a west southwest wind 19 to 24 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 43 mph.
Monday Night
Mostly clear, with a low around 34. West southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday
A chance of snow showers before noon, then a chance of rain and snow showers between noon and 3pm, then a chance of rain showers after 3pm. Partly sunny, with a high near 43. West southwest wind 8 to 14 mph becoming east in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday Night
Snow showers, possibly mixed with rain, becoming all snow after 3am. Low around 28. East wind around 9 mph, with gusts as high as 17 mph. Chance of precipitation is 80%.
Wednesday
Snow showers. Some thunder is also possible. High near 30. Chance of precipitation is 90%.
Wednesday Night
Snow showers, mainly before midnight. Some thunder is also possible. Low around 26. Chance of precipitation is 80%.
Thursday
A chance of snow showers. Partly sunny, with a high near 31.
Thursday Night
A chance of snow showers. Mostly cloudy, with a low around 25.
Friday
A slight chance of snow showers before noon. Sunny, with a high near 34.
Friday Night
Mostly clear, with a low around 27.
Saturday
Sunny, with a high near 43. Breezy.
Saturday Night
Mostly clear, with a low around 32. Breezy.
Sunday
Sunny, with a high near 43. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.66°W (Elev. 10981 ft)
Last Update:
12:46 pm MDT Oct 11, 2026
Forecast Valid:
10pm MDT Oct 11, 2026-6pm MDT Oct 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation