Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Overcast

18°F

-8°C

Humidity 67%
Wind Speed N 16 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 28 Dec 01:05 AM MST
Extended Forecast for

Riverton WY

  • Overnight

    Overnight: A 30 percent chance of snow, mainly before 3am.  Partly cloudy, with a low around 8. Wind chill values as low as zero. North northwest wind 6 to 8 mph.

    Low: 8 °F

    Chance Snow

  • Sunday

    Sunday: Sunny, with a high near 28. Wind chill values as low as zero. Light and variable wind.

    High: 28 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 6. Light and variable wind.

    Low: 6 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 33. Wind chill values as low as zero. Light and variable wind.

    High: 33 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11. Light south southwest wind.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37. Calm wind.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 14. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 14 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 43.

    High: 43 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of snow, mainly before 3am. Partly cloudy, with a low around 8. Wind chill values as low as zero. North northwest wind 6 to 8 mph.
Sunday
Sunny, with a high near 28. Wind chill values as low as zero. Light and variable wind.
Sunday Night
Mostly clear, with a low around 6. Light and variable wind.
Monday
Sunny, with a high near 33. Wind chill values as low as zero. Light and variable wind.
Monday Night
Mostly clear, with a low around 11. Light south southwest wind.
Tuesday
Mostly sunny, with a high near 37. Calm wind.
Tuesday Night
Mostly clear, with a low around 14. Calm wind becoming south southwest around 5 mph after midnight.
Wednesday
Sunny, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 18.
New Year's Day
Partly sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 23.
Friday
Partly sunny, with a high near 50.
Friday Night
Partly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 46.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.38°W (Elev. 4931 ft)
11:31 pm MST Dec 27, 2025
1am MST Dec 28, 2025-6pm MST Jan 3, 2026
 
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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