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

39°F

4°C

Humidity 37%
Wind Speed SW 9 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 07 Dec 12:53 PM MST
Extended Forecast for

Riverton WY

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 42. Southwest wind 6 to 8 mph.

    High: 42 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 21. Southwest wind around 7 mph.

    Low: 21 °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 27. Breezy, with a south southwest wind 10 to 16 mph, with gusts as high as 23 mph.

    Low: 27 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 54. Breezy, with a south southwest wind 9 to 15 mph, with gusts as high as 21 mph.

    High: 54 °F

    Partly Sunny
    and Breezy
    then Mostly
    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 28. West wind around 9 mph becoming southeast in the evening.  Chance of precipitation is 30%.

    Low: 28 °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 54. Breezy, with a west southwest wind 8 to 15 mph, with gusts as high as 24 mph.  Chance of precipitation is 40%.

    High: 54 °F

    Chance
    Rain/Snow
    then Chance
    Showers and
    Breezy

  • 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. 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 45. Chance of precipitation is 30%.

    High: 45 °F

    Chance
    Rain/Snow

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 42. Southwest wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 21. Southwest wind around 7 mph.
Monday
Mostly sunny, with a high near 43. Southwest wind 6 to 10 mph.
Monday Night
Mostly cloudy, with a low around 27. Breezy, with a south southwest wind 10 to 16 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 54. 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 28. West 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 54. Breezy, with a west southwest wind 8 to 15 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. Chance of precipitation is 30%.
Thursday
A chance of rain and snow showers, mainly before 11am. Partly sunny, with a high near 45. Chance of precipitation is 30%.
Thursday Night
A slight chance of rain and snow showers before 11pm. Mostly cloudy, with a low around 20. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 37.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.04°N 108.41°W (Elev. 5046 ft)
11:47 am MST Dec 7, 2025
1pm MST Dec 7, 2025-6pm MST Dec 13, 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