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

52°F

11°C

Humidity 34%
Wind Speed S 6 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 24 Dec 10:35 AM MST
Extended Forecast for

Riverton WY

  • Today

    Today: Mostly sunny, with a high near 58. Breezy, with an east wind 6 to 16 mph becoming west in the morning. Winds could gust as high as 24 mph.

    High: 58 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. Breezy, with a south wind 22 to 24 mph, with gusts as high as 39 mph.

    Low: 44 °F

    Mostly Cloudy
    and Breezy

  • Christmas Day

    Christmas Day: Mostly sunny, with a high near 59. Breezy, with a south southwest wind 18 to 24 mph, with gusts as high as 37 mph.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 36. Breezy, with a south southwest wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 36 °F

    Slight Chance
    Rain and
    Breezy

  • Friday

    Friday: A 40 percent chance of rain, mainly after 11am. Mostly sunny, with a high near 54. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 34 mph.

    High: 54 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: A chance of rain and snow before 11pm. 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

    Breezy.
    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Saturday

    Saturday: Sunny, with a high near 44. Southwest wind 10 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 44 °F

    Sunny

  • Saturday Night

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

    Low: 13 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 34.

    High: 34 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 58. Breezy, with an east wind 6 to 16 mph becoming west in the morning. Winds could gust as high as 24 mph.
Tonight
Mostly cloudy, with a low around 44. Breezy, with a south wind 22 to 24 mph, with gusts as high as 39 mph.
Christmas Day
Mostly sunny, with a high near 59. Breezy, with a south southwest wind 18 to 24 mph, with gusts as high as 37 mph.
Thursday Night
A 20 percent chance of rain after 11pm. Partly cloudy, with a low around 36. Breezy, with a south southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Friday
A 40 percent chance of rain, mainly after 11am. Mostly sunny, with a high near 54. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 34 mph.
Friday Night
A chance of rain and snow before 11pm. 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
Sunny, with a high near 44. Southwest wind 10 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 13.
Sunday
Sunny, with a high near 34.
Sunday Night
Mostly clear, with a low around 13.
Monday
Sunny, with a high near 40.
Monday Night
Mostly clear, with a low around 18.
Tuesday
Mostly sunny, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.04°N 108.41°W (Elev. 5046 ft)
Last Update:
9:33 am MST Dec 24, 2025
Forecast Valid:
10am MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation