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

64°F

18°C

Humidity 25%
Wind Speed ENE 9 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 12 May 10:35 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: A 30 percent chance of 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.

    High: 91 °F

    Sunny then
    Chance
    Showers and
    Windy

  • Wednesday Night

    Wednesday Night: A slight chance of 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.
    Slight Chance
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Breezy, with a west wind 17 to 23 mph, with gusts as high as 37 mph.

    High: 75 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. Breezy, with a west southwest wind 13 to 21 mph, with gusts as high as 32 mph.

    Low: 42 °F

    Mostly Clear
    and Breezy

  • Friday

    Friday: Sunny, with a high near 76. Windy, with a west wind 8 to 18 mph increasing to 19 to 29 mph in the afternoon. Winds could gust as high as 43 mph.

    High: 76 °F

    Sunny then
    Sunny and
    Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 41. Windy, with a west wind 21 to 26 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 38 mph.

    Low: 41 °F

    Mostly Clear
    and Windy
    then Mostly
    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 75. Breezy.

    High: 75 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 43. Breezy.

    Low: 43 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 50. Northeast wind 5 to 8 mph becoming north northwest after midnight.
Wednesday
A 30 percent chance of 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.
Wednesday Night
A slight chance of 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 75. Breezy, with a west wind 17 to 23 mph, with gusts as high as 37 mph.
Thursday Night
Mostly clear, with a low around 42. Breezy, with a west southwest wind 13 to 21 mph, with gusts as high as 32 mph.
Friday
Sunny, with a high near 76. Windy, with a west wind 8 to 18 mph increasing to 19 to 29 mph in the afternoon. Winds could gust as high as 43 mph.
Friday Night
Mostly clear, with a low around 41. Windy, with a west wind 21 to 26 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 38 mph.
Saturday
Mostly sunny, with a high near 75. Breezy.
Saturday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 43. Breezy.
Sunday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 55. Breezy. Chance of precipitation is 50%.
Sunday Night
Rain and snow showers likely. Some thunder is also possible. Mostly cloudy, with a low around 33. Windy.
Monday
Rain and snow showers likely. Some thunder is also possible. Partly sunny, with a high near 50. Breezy.
Monday Night
A chance of showers. Mostly cloudy, with a low around 33.
Tuesday
Mostly sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton Regional Airport WY
 43.06°N 108.45°W (Elev. 5420 ft)
Last Update:
10:02 pm MDT May 12, 2026
Forecast Valid:
10pm MDT May 12, 2026-6pm MDT May 19, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation