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 10 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 12 May 10:20 PM MDT
Extended Forecast for

Riverton WY

  • Tonight

    Tonight: Mostly clear, with a low around 47. Northeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 47 °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 27 to 32 mph in the afternoon. Winds could gust as high as 45 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 50. Breezy, with a west southwest wind 17 to 22 mph becoming southwest 7 to 12 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 20%.

    Low: 50 °F

    Breezy.
    Slight Chance
    Showers then
    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Breezy, with a west wind 11 to 20 mph, with gusts as high as 32 mph.

    High: 76 °F

    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 40. Breezy, with a southwest wind 9 to 17 mph, with gusts as high as 29 mph.

    Low: 40 °F

    Mostly Clear
    and Breezy
    then Clear

  • Friday

    Friday: Sunny, with a high near 78. Windy, with a west wind 6 to 11 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 78 °F

    Sunny then
    Sunny and
    Windy

  • Friday Night

    Friday Night: Mostly clear, with a low around 39. Breezy, with a west southwest wind 18 to 23 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 33 mph.

    Low: 39 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 77. Breezy.

    High: 77 °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 41. Breezy.

    Low: 41 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 47. Northeast wind 5 to 7 mph becoming light and variable 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 27 to 32 mph in the afternoon. Winds could gust as high as 45 mph.
Wednesday Night
A slight chance of showers between 8pm and 10pm. Cloudy during the early evening, then gradual clearing, with a low around 50. Breezy, with a west southwest wind 17 to 22 mph becoming southwest 7 to 12 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 20%.
Thursday
Sunny, with a high near 76. Breezy, with a west wind 11 to 20 mph, with gusts as high as 32 mph.
Thursday Night
Mostly clear, with a low around 40. Breezy, with a southwest wind 9 to 17 mph, with gusts as high as 29 mph.
Friday
Sunny, with a high near 78. Windy, with a west wind 6 to 11 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 37 mph.
Friday Night
Mostly clear, with a low around 39. Breezy, with a west southwest wind 18 to 23 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 33 mph.
Saturday
Mostly sunny, with a high near 77. Breezy.
Saturday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. Breezy.
Sunday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 57. Breezy. Chance of precipitation is 50%.
Sunday Night
Rain and snow showers likely. Some thunder is also possible. Mostly cloudy, with a low around 32. Breezy.
Monday
Rain likely, possibly mixed with snow showers. Some thunder is also possible. Partly sunny, with a high near 52. Breezy.
Monday Night
A slight chance of showers. Mostly cloudy, with a low around 32.
Tuesday
Mostly sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.41°W (Elev. 5003 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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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation