Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

Lat: 43.06219°NLon: 108.44701°WElev: 5443.0ft.

Clear

30°F

-1°C

Humidity 58%
Wind Speed W 5 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 07 Dec 08:20 PM MST
Extended Forecast for

Riverton WY

  • Tonight

    Tonight: Partly cloudy, with a low around 18. West wind around 7 mph becoming south after midnight.

    Low: 18 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 43. Southwest wind 6 to 10 mph.

    High: 43 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. Breezy, with a south southwest wind 9 to 16 mph, with gusts as high as 23 mph.

    Low: 30 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 52. Breezy, with a south southwest wind 9 to 15 mph, with gusts as high as 21 mph.

    High: 52 °F

    Partly Sunny
    and Breezy
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain showers before 2am, then a chance of rain and snow showers.  Mostly cloudy, with a low around 27. West southwest wind around 9 mph becoming southeast in the evening.  Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Showers then
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow showers before 11am, then a chance of rain showers.  Partly sunny, with a high near 55. Southwest wind 8 to 13 mph, with gusts as high as 24 mph.  Chance of precipitation is 40%.

    High: 55 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of rain showers before 11pm, then a chance of rain and snow showers.  Mostly cloudy, with a low around 31. North northwest wind around 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 30%.

    Low: 31 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of rain and snow showers, mainly before 11am.  Partly sunny, with a high near 46. Chance of precipitation is 30%.

    High: 46 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A slight chance of rain and snow showers before 11pm.  Mostly cloudy, with a low around 19. Chance of precipitation is 20%.

    Low: 19 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 18. West wind around 7 mph becoming south after midnight.
Monday
Mostly sunny, with a high near 43. Southwest wind 6 to 10 mph.
Monday Night
Mostly cloudy, with a low around 30. Breezy, with a south southwest wind 9 to 16 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 52. Breezy, with a south southwest wind 9 to 15 mph, with gusts as high as 21 mph.
Tuesday Night
A chance of rain showers before 2am, then a chance of rain and snow showers. Mostly cloudy, with a low around 27. West southwest wind around 9 mph becoming southeast in the evening. Chance of precipitation is 30%.
Wednesday
A chance of rain and snow showers before 11am, then a chance of rain showers. Partly sunny, with a high near 55. Southwest wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of rain showers before 11pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 31. North northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday
A chance of rain and snow showers, mainly before 11am. Partly sunny, with a high near 46. Chance of precipitation is 30%.
Thursday Night
A slight chance of rain and snow showers before 11pm. Mostly cloudy, with a low around 19. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 38.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 47.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.38°W (Elev. 4931 ft)
8:31 pm MST Dec 7, 2025
8pm MST Dec 7, 2025-6pm MST Dec 14, 2025
 
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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