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

52°F

11°C

Humidity 96%
Wind Speed SE 3 mph
Barometer 30.41 in
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 28 Jul 4:55 am MDT
Extended Forecast for

3 Miles W Saint Marys Glacier CO

  • Today

    Today: Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then showers and thunderstorms likely after 5pm. High near 59. West wind 6 to 11 mph becoming north in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 80%.

    High: 59 °F

    Slight Chance
    Showers then
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 46. West northwest wind 5 to 8 mph becoming south in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely then
    Partly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm. High near 60. West wind 6 to 8 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 90%.

    High: 60 °F

    Slight Chance
    Showers then
    T-storms

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 45. West southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely then
    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59. Northwest wind 10 to 13 mph, with gusts as high as 23 mph.

    High: 59 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

Detailed Forecast

Today
Showers and thunderstorms likely before 3pm, then showers and possibly a thunderstorm between 3pm and 5pm, then showers and thunderstorms likely after 5pm. High near 59. West wind 6 to 11 mph becoming north in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 80%.
Tonight
Showers and thunderstorms likely, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 46. West northwest wind 5 to 8 mph becoming south in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Wednesday
Showers and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 4pm, then showers and thunderstorms likely after 4pm. High near 60. West wind 6 to 8 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 45. West southwest wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 59. Northwest wind 10 to 13 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 45.
Saturday
Sunny, with a high near 62.
Saturday Night
Partly cloudy, with a low around 46.
Sunday
A slight chance of showers and thunderstorms. Sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 48. Breezy.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 63. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Saint Marys Glacier CO
 39.84°N 105.69°W (Elev. 12507 ft)
Last Update:
12:46 am MDT Jul 28, 2026
Forecast Valid:
5am MDT Jul 28, 2026-6pm MDT Aug 3, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation