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.

Clear

36°F

2°C

Humidity 47%
Wind Speed SSW 8 MPH
Barometer 29.73 in (1006.77 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 07 Jan 03:35 AM MST
Extended Forecast for

3 Miles WNW Arapahoe WY

  • Overnight

    Overnight: Mostly cloudy, with a low around 33. South southwest wind 11 to 13 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 49. Breezy, with a west southwest wind 14 to 16 mph, with gusts as high as 23 mph.

    High: 49 °F

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 20. West wind 5 to 10 mph becoming east in the evening.

    Low: 20 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 38. Northwest wind 5 to 9 mph.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of snow showers before 11pm. Partly cloudy, with a low around 13. North wind around 10 mph becoming west after midnight.

    Low: 13 °F

    Slight Chance
    Snow Showers
    then Mostly
    Clear

  • Friday

    Friday: Sunny, with a high near 35. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 35 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 14. West southwest wind around 9 mph.

    Low: 14 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 33. South southwest wind 11 to 13 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 49. Breezy, with a west southwest wind 14 to 16 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 20. West wind 5 to 10 mph becoming east in the evening.
Thursday
Mostly sunny, with a high near 38. Northwest wind 5 to 9 mph.
Thursday Night
A 20 percent chance of snow showers before 11pm. Partly cloudy, with a low around 13. North wind around 10 mph becoming west after midnight.
Friday
Sunny, with a high near 35. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 14. West southwest wind around 9 mph.
Saturday
Sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 17.
Sunday
Mostly sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Sunny, with a high near 44.
Monday Night
Partly cloudy, with a low around 22.
Tuesday
Partly sunny, with a high near 48.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Arapahoe WY
 42.99°N 108.56°W (Elev. 5197 ft)
Last Update:
3:33 am MST Jan 7, 2026
Forecast Valid:
3am MST Jan 7, 2026-6pm MST Jan 13, 2026
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation