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

47°F

8°C

Humidity 48%
Wind Speed Calm
Barometer 30.45 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 11 Aug 8:35 am MDT
Extended Forecast for

Saint Marys Glacier CO

  • Today

    Today: Mostly sunny, with a high near 60. North northwest wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 21 mph.

    High: 60 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. East wind 5 to 8 mph becoming light and variable. Winds could gust as high as 20 mph.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 62. South southwest wind 6 to 11 mph becoming east southeast in the morning. Winds could gust as high as 22 mph.

    High: 62 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Southeast wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70. West wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 70 °F

    Sunny then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny
    then T-storms
    Likely

Detailed Forecast

Today
Mostly sunny, with a high near 60. North northwest wind 5 to 9 mph becoming east in the afternoon. Winds could gust as high as 21 mph.
Tonight
Mostly clear, with a low around 42. East wind 5 to 8 mph becoming light and variable. Winds could gust as high as 20 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 62. South southwest wind 6 to 11 mph becoming east southeast in the morning. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 47. Southeast wind 8 to 13 mph becoming west after midnight. Winds could gust as high as 23 mph.
Wednesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70. West wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 51.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 69.
Thursday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.
Friday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 67.
Friday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 64.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 47.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Marys Glacier CO
 39.82°N 105.63°W (Elev. 10735 ft)
Last Update:
5:00 am MDT Aug 11, 2025
Forecast Valid:
8am MDT Aug 11, 2025-6pm MDT Aug 17, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation