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

40°F

4°C

Humidity 97%
Wind Speed Calm
Barometer 30.31 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 13 Sep 3:35 am MDT
Extended Forecast for

4 Miles W Saint Marys Glacier CO

  • Overnight

    Overnight: A 20 percent chance of snow showers. Mostly cloudy, with a steady temperature around 37. West wind around 10 mph, with gusts as high as 16 mph.

    Low: 37 °F

    Slight Chance
    Snow Showers

  • Saturday

    Saturday: Rain and snow showers. Some thunder is also possible. High near 41. West northwest wind 5 to 9 mph becoming east southeast in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Saturday Night

    Saturday Night: Snow showers likely, possibly mixed with rain, becoming all snow after 7pm. Some thunder is also possible. Mostly cloudy, with a steady temperature around 34. Breezy, with a west northwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 34 °F

    Rain/Snow
    Likely then
    Chance Snow
    Showers and
    Breezy

  • Sunday

    Sunday: A 50 percent chance of snow showers, mainly before noon. Some thunder is also possible. Cloudy, then gradually becoming mostly sunny, with a high near 39. Breezy, with a west northwest wind around 15 mph, with gusts as high as 29 mph. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Breezy.
    Chance Snow
    Showers then
    Slight Chance
    Snow Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. West wind around 14 mph, with gusts as high as 25 mph.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of snow showers after noon. Some thunder is also possible. Partly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny
    then Chance
    Snow Showers

  • Tuesday Night

    Tuesday Night: A slight chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 31.

    Low: 31 °F

    Slight Chance
    Snow Showers
    then Mostly
    Clear

Detailed Forecast

Overnight
A 20 percent chance of snow showers. Mostly cloudy, with a steady temperature around 37. West wind around 10 mph, with gusts as high as 16 mph.
Saturday
Rain and snow showers. Some thunder is also possible. High near 41. West northwest wind 5 to 9 mph becoming east southeast in the morning. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Saturday Night
Snow showers likely, possibly mixed with rain, becoming all snow after 7pm. Some thunder is also possible. Mostly cloudy, with a steady temperature around 34. Breezy, with a west northwest wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Sunday
A 50 percent chance of snow showers, mainly before noon. Some thunder is also possible. Cloudy, then gradually becoming mostly sunny, with a high near 39. Breezy, with a west northwest wind around 15 mph, with gusts as high as 29 mph. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly clear, with a low around 34. West wind around 14 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 47.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
A chance of snow showers after noon. Some thunder is also possible. Partly sunny, with a high near 45.
Tuesday Night
A slight chance of snow showers before midnight. Some thunder is also possible. Partly cloudy, with a low around 31.
Wednesday
A chance of snow showers after noon. Some thunder is also possible. Mostly sunny, with a high near 43.
Wednesday Night
Mostly clear, with a low around 32.
Thursday
Sunny, with a high near 47.
Thursday Night
Mostly clear, with a low around 35.
Friday
A slight chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Saint Marys Glacier CO
 39.84°N 105.72°W (Elev. 12260 ft)
Last Update:
2:27 am MDT Sep 13, 2025
Forecast Valid:
3am MDT Sep 13, 2025-6pm MDT Sep 19, 2025
 
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