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.

Fair

64°F

18°C

Humidity 12%
Wind Speed W 10 G 20 mph
Barometer 30.22 in
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Last update 20 Apr 4:55 pm MDT
Extended Forecast for

Saint Marys Glacier CO

  • Tonight

    Tonight: Mostly clear, with a low around 34. Breezy, with a west northwest wind 11 to 15 mph, with gusts as high as 23 mph.

    Low: 34 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: A slight chance of snow showers after noon, mixing with rain after 3pm. Mostly sunny, with a high near 49. West northwest wind 8 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.

    High: 49 °F

    Sunny then
    Slight Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. Breezy, with a south southeast wind 11 to 16 mph becoming west 18 to 23 mph after midnight. Winds could gust as high as 33 mph.

    Low: 34 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. Windy, with a west southwest wind 23 to 31 mph, with gusts as high as 47 mph.

    High: 48 °F

    Mostly Sunny
    and Windy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow showers. Partly cloudy, with a low around 22. Very windy, with a west wind 33 to 40 mph, with gusts as high as 60 mph.

    Low: 22 °F

    Slight Chance
    Snow Showers
    and Very
    Windy

  • Thursday

    Thursday: A 50 percent chance of snow showers. Partly sunny, with a high near 32. Very windy.

    High: 32 °F

    Chance Snow
    Showers and
    Very Windy

  • Thursday Night

    Thursday Night: A 50 percent chance of snow showers. Mostly cloudy, with a low around 21. Windy.

    Low: 21 °F

    Chance Snow
    Showers and
    Windy

  • Friday

    Friday: Snow showers likely. Some thunder is also possible. Mostly cloudy, with a high near 33. Windy.

    High: 33 °F

    Snow Showers
    Likely and
    Windy

  • Friday Night

    Friday Night: Snow showers likely. Mostly cloudy, with a low around 18. Breezy.

    Low: 18 °F

    Snow Showers
    Likely and
    Breezy

Detailed Forecast

Tonight
Mostly clear, with a low around 34. Breezy, with a west northwest wind 11 to 15 mph, with gusts as high as 23 mph.
Tuesday
A slight chance of snow showers after noon, mixing with rain after 3pm. Mostly sunny, with a high near 49. West northwest wind 8 to 14 mph becoming south southeast in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 34. Breezy, with a south southeast wind 11 to 16 mph becoming west 18 to 23 mph after midnight. Winds could gust as high as 33 mph.
Wednesday
Mostly sunny, with a high near 48. Windy, with a west southwest wind 23 to 31 mph, with gusts as high as 47 mph.
Wednesday Night
A 20 percent chance of snow showers. Partly cloudy, with a low around 22. Very windy, with a west wind 33 to 40 mph, with gusts as high as 60 mph.
Thursday
A 50 percent chance of snow showers. Partly sunny, with a high near 32. Very windy.
Thursday Night
A 50 percent chance of snow showers. Mostly cloudy, with a low around 21. Windy.
Friday
Snow showers likely. Some thunder is also possible. Mostly cloudy, with a high near 33. Windy.
Friday Night
Snow showers likely. Mostly cloudy, with a low around 18. Breezy.
Saturday
Snow showers. Some thunder is also possible. Mostly cloudy, with a high near 30. Breezy.
Saturday Night
Snow showers likely. Mostly cloudy, with a low around 19. Blustery.
Sunday
Snow showers. The snow could be heavy at times. Some thunder is also possible. Mostly cloudy, with a high near 27. Breezy.
Sunday Night
Snow showers. Mostly cloudy, with a low around 19.
Monday
Snow showers. Some thunder is also possible. Mostly cloudy, with a high near 29. 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:
12:47 pm MDT Apr 20, 2026
Forecast Valid:
5pm MDT Apr 20, 2026-6pm MDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation