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

Heavy Mountain Snow in the Northwest U.S.; Wintry Mix in the Northeast U.S.

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. overnight into Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Mostly Cloudy

36°F

2°C

Humidity 47%
Wind Speed S 12 MPH
Barometer 29.77 in (1008.13 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 06 Jan 11:20 PM MST
Extended Forecast for

Riverton WY

  • Tonight

    Tonight: Mostly cloudy, with a low around 28. Breezy, with a south wind 15 to 22 mph, with gusts as high as 30 mph.

    Low: 28 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 50. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 23 mph.

    High: 50 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 19. West southwest wind 6 to 13 mph.

    Low: 19 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 38. West wind 5 to 9 mph becoming north northwest in the afternoon.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 13. West northwest wind around 10 mph.

    Low: 13 °F

    Slight Chance
    Snow Showers
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 33. West wind 8 to 10 mph.

    High: 33 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 10. Southwest wind around 8 mph.

    Low: 10 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 37.

    High: 37 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 13.

    Low: 13 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 28. Breezy, with a south wind 15 to 22 mph, with gusts as high as 30 mph.
Wednesday
Mostly cloudy, with a high near 50. Breezy, with a south southwest wind 11 to 16 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 19. West southwest wind 6 to 13 mph.
Thursday
Mostly sunny, with a high near 38. West wind 5 to 9 mph becoming north northwest in the afternoon.
Thursday Night
A 20 percent chance of snow showers before 11pm. Mostly cloudy, with a low around 13. West northwest wind around 10 mph.
Friday
Sunny, with a high near 33. West wind 8 to 10 mph.
Friday Night
Mostly clear, with a low around 10. Southwest wind around 8 mph.
Saturday
Sunny, with a high near 37.
Saturday Night
Mostly clear, with a low around 13.
Sunday
Mostly sunny, with a high near 41.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Mostly sunny, with a high near 42.
Monday Night
Partly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.38°W (Elev. 4931 ft)
Last Update:
11:02 pm MST Jan 6, 2026
Forecast Valid:
11pm MST Jan 6, 2026-6pm MST Jan 13, 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