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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Current conditions at

Granby-Grand County Airport (KGNB)

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

Fair

62°F

17°C

Humidity 39%
Wind Speed Calm
Barometer 30.16 in
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 17 Jun 11:15 pm MDT
Extended Forecast for

3 Miles S Downieville CO

  • Tonight

    Tonight: Mostly clear, with a low around 42. Northwest wind around 6 mph becoming light and variable.

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Breezy, with a west southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 75 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45. Breezy, with a west wind 5 to 15 mph, with gusts as high as 26 mph.

    Low: 45 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 74. Light and variable wind becoming east 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47. East wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. Breezy.

    High: 75 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 45. Breezy.

    Low: 45 °F

    Mostly Clear
    and Breezy
    then Clear

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 70. Breezy.

    High: 70 °F

    Breezy. Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 42.

    Low: 42 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 42. Northwest wind around 6 mph becoming light and variable.
Thursday
Sunny, with a high near 75. Breezy, with a west southwest wind 5 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Thursday Night
Partly cloudy, with a low around 45. Breezy, with a west wind 5 to 15 mph, with gusts as high as 26 mph.
Juneteenth
Mostly sunny, with a high near 74. Light and variable wind becoming east 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Friday Night
Partly cloudy, with a low around 47. East wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75. Breezy.
Saturday Night
Mostly clear, with a low around 45. Breezy.
Sunday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 70. Breezy.
Sunday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 42.
Monday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 44.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Downieville CO
 39.74°N 105.62°W (Elev. 10233 ft)
Last Update:
12:46 pm MDT Jun 17, 2026
Forecast Valid:
11pm MDT Jun 17, 2026-6pm MDT Jun 24, 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