National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Granby-Grand County Airport (KGNB)

Lat: 40.09°NLon: 105.92°WElev: 8207ft.

Fair

71°F

22°C

Humidity 25%
Wind Speed Calm
Barometer 30.36 in
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 17 Aug 7:55 pm MDT
Extended Forecast for

Rand CO

  • Tonight

    Tonight: Mostly clear, with a low around 43. West wind around 6 mph becoming south southeast in the evening.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 43. West northwest wind 6 to 9 mph becoming east southeast in the evening. Winds could gust as high as 15 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. East northeast wind 7 to 10 mph becoming south southeast after midnight. Winds could gust as high as 17 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.

    Low: 45 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 43. West wind around 6 mph becoming south southeast in the evening.
Monday
Sunny, with a high near 78. Calm wind becoming west southwest 5 to 9 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 43. West northwest wind 6 to 9 mph becoming east southeast in the evening. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 81. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 44. East northeast wind 7 to 10 mph becoming south southeast after midnight. Winds could gust as high as 17 mph.
Wednesday
Sunny, with a high near 83.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Thursday Night
A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45.
Friday
A slight chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 77.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 42.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 75.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 42.
Sunday
Showers and thunderstorms likely. Partly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rand CO
 40.47°N 106.19°W (Elev. 8599 ft)
Last Update:
3:15 pm MDT Aug 17, 2025
Forecast Valid:
8pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
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