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

40°F

4°C

Humidity 46%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 24 Dec 06:53 AM MST
Extended Forecast for

Riverton Regional Airport WY

  • Today

    Today: Mostly sunny, with a high near 58. Breezy, with a west northwest wind 8 to 18 mph becoming south in the morning. Winds could gust as high as 28 mph.

    High: 58 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 43. Breezy, with a south wind 21 to 24 mph, with gusts as high as 37 mph.

    Low: 43 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance Rain

  • Christmas Day

    Christmas Day: A 40 percent chance of rain. Mostly sunny, with a high near 58. Breezy, with a southwest wind 17 to 20 mph, with gusts as high as 30 mph.

    High: 58 °F

    Chance Rain
    and Breezy

  • Thursday Night

    Thursday Night: A 20 percent chance of rain. Partly cloudy, with a low around 34. Breezy, with a south southwest wind around 18 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Slight Chance
    Rain and
    Breezy

  • Friday

    Friday: A 40 percent chance of rain, mainly after 11am. Mostly sunny, with a high near 53. Breezy, with a southwest wind 18 to 23 mph, with gusts as high as 34 mph.

    High: 53 °F

    Chance Rain
    and Breezy

  • Friday Night

    Friday Night: A chance of rain and snow before 8pm, then a chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 28. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 28 °F

    Breezy.
    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Saturday

    Saturday: Sunny, with a high near 43. Southwest wind 11 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 43 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 14.

    Low: 14 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 33.

    High: 33 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 58. Breezy, with a west northwest wind 8 to 18 mph becoming south in the morning. Winds could gust as high as 28 mph.
Tonight
A 20 percent chance of rain after 2am. Mostly cloudy, with a low around 43. Breezy, with a south wind 21 to 24 mph, with gusts as high as 37 mph.
Christmas Day
A 40 percent chance of rain. Mostly sunny, with a high near 58. Breezy, with a southwest wind 17 to 20 mph, with gusts as high as 30 mph.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 34. Breezy, with a south southwest wind around 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 53. Breezy, with a southwest wind 18 to 23 mph, with gusts as high as 34 mph.
Friday Night
A chance of rain and snow before 8pm, then a chance of snow between 8pm and 11pm. Mostly cloudy, with a low around 28. Breezy, with a southwest wind 16 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 43. Southwest wind 11 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Mostly clear, with a low around 14.
Sunday
Sunny, with a high near 33.
Sunday Night
Mostly clear, with a low around 14.
Monday
Sunny, with a high near 38.
Monday Night
Mostly clear, with a low around 17.
Tuesday
Mostly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton Regional Airport WY
 43.06°N 108.45°W (Elev. 5420 ft)
Last Update:
6:33 am MST Dec 24, 2025
Forecast Valid:
7am MST Dec 24, 2025-6pm MST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation