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

49°F

9°C

Humidity 50%
Wind Speed SE 3 mph
Barometer 30.47 in
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Last update 5 Jul 3:15 am MDT
Extended Forecast for

4 Miles W Saint Marys Glacier CO

  • Overnight

    Overnight: Patchy smoke. Mostly clear, with a steady temperature around 43. Southwest wind around 9 mph, with gusts as high as 15 mph.

    Low: 43 °F

    Patchy Smoke

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 3pm. Patchy smoke before 8am. Increasing clouds, with a high near 58. Light and variable wind becoming southeast 5 to 10 mph in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 30%.

    High: 58 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Patchy smoke after midnight. Mostly clear, with a low around 43. Southeast wind 10 to 13 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.

    Low: 43 °F

    Partly Cloudy
    then Patchy
    Smoke

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 3pm. Patchy smoke before 11am, then patchy smoke after 1pm. Increasing clouds, with a high near 61. West southwest wind 6 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.

    High: 61 °F

    Patchy Smoke
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Patchy smoke before 7pm. Partly cloudy, with a low around 45. South southeast wind 10 to 14 mph becoming west southwest after midnight. Winds could gust as high as 21 mph.

    Low: 45 °F

    Patchy Smoke
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 58. Chance of precipitation is 60%.

    High: 58 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 44. Chance of precipitation is 40%.

    Low: 44 °F

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.

    Low: 43 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Patchy smoke. Mostly clear, with a steady temperature around 43. Southwest wind around 9 mph, with gusts as high as 15 mph.
Sunday
A chance of showers, with thunderstorms also possible after 3pm. Patchy smoke before 8am. Increasing clouds, with a high near 58. Light and variable wind becoming southeast 5 to 10 mph in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 30%.
Sunday Night
Patchy smoke after midnight. Mostly clear, with a low around 43. Southeast wind 10 to 13 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.
Monday
A 20 percent chance of showers and thunderstorms after 3pm. Patchy smoke before 11am, then patchy smoke after 1pm. Increasing clouds, with a high near 61. West southwest wind 6 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 16 mph.
Monday Night
Patchy smoke before 7pm. Partly cloudy, with a low around 45. South southeast wind 10 to 14 mph becoming west southwest after midnight. Winds could gust as high as 21 mph.
Tuesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 58. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 44. Chance of precipitation is 40%.
Wednesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 59.
Wednesday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.
Thursday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 58. Breezy.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 42.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 61.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 66.
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Forecast Area
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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:
1:01 am MDT Jul 5, 2026
Forecast Valid:
3am MDT Jul 5, 2026-6pm MDT Jul 11, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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