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

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Overcast

36°F

2°C

Humidity 55%
Wind Speed NW 8 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill30°F (-1°C)
Last update 01 Jan 05:35 PM MST
Extended Forecast for

Riverton WY

  • New Year's Day

    New Year's Day: A 20 percent chance of showers. Mostly cloudy, with a high near 46. Calm wind.

    High: 46 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 31. West southwest wind 3 to 6 mph.

    Low: 31 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 52. South southwest wind 5 to 9 mph becoming northwest in the afternoon.

    High: 52 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25. South southwest wind around 7 mph.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 50. South wind 6 to 9 mph.

    High: 50 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 28. South wind around 10 mph.

    Low: 28 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 54. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

Detailed Forecast

New Year's Day
A 20 percent chance of showers. Mostly cloudy, with a high near 46. Calm wind.
Tonight
A 20 percent chance of showers before 10pm. Mostly cloudy, with a low around 31. West southwest wind 3 to 6 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 52. South southwest wind 5 to 9 mph becoming northwest in the afternoon.
Friday Night
Partly cloudy, with a low around 25. South southwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 50. South wind 6 to 9 mph.
Saturday Night
Mostly cloudy, with a low around 28. South wind around 10 mph.
Sunday
Mostly sunny, with a high near 54. South southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Sunday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 53.
Monday Night
Partly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 48.
Tuesday Night
Partly cloudy, with a low around 21.
Wednesday
Mostly sunny, with a high near 46.
Wednesday Night
Partly cloudy, with a low around 20.
Thursday
A slight chance of snow showers. Mostly sunny, with a high near 41.
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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:
5:01 pm MST Jan 1, 2026
Forecast Valid:
5pm MST Jan 1, 2026-6pm MST Jan 8, 2026
 
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Additional Resources

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