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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

50°F

10°C

Humidity 57%
Wind Speed S 12 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 25 Dec 12:20 AM MST
Extended Forecast for

8 Miles NE Riverton WY

  • Overnight

    Overnight: Mostly cloudy, with a low around 44. Breezy, with a south wind 17 to 24 mph, with gusts as high as 37 mph.

    Low: 44 °F

    Mostly Cloudy
    and Breezy

  • Christmas Day

    Christmas Day: Mostly sunny, with a high near 62. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 34 mph.

    High: 62 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 37. Breezy, with a south southwest wind 14 to 17 mph, with gusts as high as 26 mph.

    Low: 37 °F

    Mostly Clear
    and Breezy

  • Friday

    Friday: A 40 percent chance of rain after 11am. Mostly sunny, with a high near 54. Windy, with a south southwest wind 18 to 26 mph, with gusts as high as 40 mph.

    High: 54 °F

    Chance Rain
    and Windy

  • Friday Night

    Friday Night: A chance of rain before 8pm, then a chance of rain and snow between 8pm and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 27. Breezy, with a southwest wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow and
    Breezy

  • Saturday

    Saturday: Mostly sunny, with a high near 45. Breezy, with a southwest wind 13 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.

    High: 45 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 11. North wind 7 to 11 mph.

    Low: 11 °F

    Chance Snow

  • Sunday

    Sunday: Sunny, with a high near 30.

    High: 30 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 7.

    Low: 7 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 44. Breezy, with a south wind 17 to 24 mph, with gusts as high as 37 mph.
Christmas Day
Mostly sunny, with a high near 62. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 34 mph.
Thursday Night
Mostly clear, with a low around 37. Breezy, with a south southwest wind 14 to 17 mph, with gusts as high as 26 mph.
Friday
A 40 percent chance of rain after 11am. Mostly sunny, with a high near 54. Windy, with a south southwest wind 18 to 26 mph, with gusts as high as 40 mph.
Friday Night
A chance of rain before 8pm, then a chance of rain and snow between 8pm and 2am, then a slight chance of snow after 2am. Mostly cloudy, with a low around 27. Breezy, with a southwest wind 14 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 45. Breezy, with a southwest wind 13 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 23 mph.
Saturday Night
A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 11. North wind 7 to 11 mph.
Sunday
Sunny, with a high near 30.
Sunday Night
Mostly clear, with a low around 7.
Monday
Sunny, with a high near 35.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Partly sunny, with a high near 41.
Tuesday Night
Partly cloudy, with a low around 17.
Wednesday
Sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
8 Miles NE Riverton WY
 43.09°N 108.27°W (Elev. 4833 ft)
Last Update:
12:02 am MST Dec 25, 2025
Forecast Valid:
12am MST Dec 25, 2025-6pm MST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation