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

Severe Thunderstorms and Critical Fire Weather Wednesday

Scattered severe thunderstorms are possible across portions of the northern High Plains Wednesday afternoon and evening. Severe wind gusts are the primary hazard. Gusty winds and low relative humidity will contribute to critical fire weather conditions across parts of the northern Great Plains and Great Basin Wednesday. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

72°F

22°C

Humidity 20%
Wind Speed ENE 9 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 12 May 08:20 PM MDT
Extended Forecast for

Riverton Regional Airport WY

  • Tonight

    Tonight: Mostly clear, with a low around 50. Northeast wind 5 to 8 mph becoming north northwest after midnight.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Scattered showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 91. Windy, with a light and variable wind becoming southwest 28 to 33 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 30%.

    High: 91 °F

    Sunny then
    Scattered
    Showers and
    Windy

  • Wednesday Night

    Wednesday Night: Isolated showers between 8pm and 10pm. Cloudy during the early evening, then gradual clearing, with a low around 52. Breezy, with a west southwest wind 19 to 24 mph becoming west southwest 7 to 12 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Breezy.
    Isolated
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Breezy, with a west wind 16 to 24 mph, with gusts as high as 37 mph.

    High: 76 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Clear, with a low around 44. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 34 mph.

    Low: 44 °F

    Clear and
    Breezy

  • Friday

    Friday: Sunny, with a high near 77. Windy, with a west wind 8 to 18 mph increasing to 21 to 31 mph in the afternoon. Winds could gust as high as 44 mph.

    High: 77 °F

    Sunny then
    Sunny and
    Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 43. Breezy, with a west wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.

    Low: 43 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 77. Breezy.

    High: 77 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42. Breezy.

    Low: 42 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Tonight
Mostly clear, with a low around 50. Northeast wind 5 to 8 mph becoming north northwest after midnight.
Wednesday
Scattered showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 91. Windy, with a light and variable wind becoming southwest 28 to 33 mph in the afternoon. Winds could gust as high as 47 mph. Chance of precipitation is 30%.
Wednesday Night
Isolated showers between 8pm and 10pm. Cloudy during the early evening, then gradual clearing, with a low around 52. Breezy, with a west southwest wind 19 to 24 mph becoming west southwest 7 to 12 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 76. Breezy, with a west wind 16 to 24 mph, with gusts as high as 37 mph.
Thursday Night
Clear, with a low around 44. Breezy, with a west southwest wind 15 to 23 mph, with gusts as high as 34 mph.
Friday
Sunny, with a high near 77. Windy, with a west wind 8 to 18 mph increasing to 21 to 31 mph in the afternoon. Winds could gust as high as 44 mph.
Friday Night
Mostly clear, with a low around 43. Breezy, with a west wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 30 mph.
Saturday
Sunny, with a high near 77. Breezy.
Saturday Night
Mostly cloudy, with a low around 42. Breezy.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 59. Breezy. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow showers. Some thunder is also possible. Mostly cloudy, with a low around 34. Breezy.
Monday
A slight chance of rain and snow showers. Some thunder is also possible. Mostly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton Regional Airport WY
 43.06°N 108.45°W (Elev. 5420 ft)
Last Update:
8:03 pm MDT May 12, 2026
Forecast Valid:
8pm MDT May 12, 2026-6pm MDT May 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation