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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

64°F

18°C

Humidity 55%
Wind Speed NW 12 MPH
Barometer 30.16 in (1021.34 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 28 Aug 03:00 AM MDT
Extended Forecast for

Riverton WY

  • Overnight

    Overnight: Mostly cloudy, with a low around 61. West southwest wind around 7 mph.

    Low: 61 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Partly sunny, with a high near 85. Light and variable wind becoming west southwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 85 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 4am. Mostly cloudy, with a low around 59. North northwest wind 5 to 8 mph becoming south southwest after midnight. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 82. Breezy, with a west southwest wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 57. South southwest wind 7 to 14 mph, with gusts as high as 24 mph.

    Low: 57 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Sunday

    Sunday: A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81. Breezy, with a southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.

    High: 81 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Breezy, with a west wind 6 to 15 mph, with gusts as high as 26 mph.

    Low: 50 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 61. West southwest wind around 7 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 4pm. Partly sunny, with a high near 85. Light and variable wind becoming west southwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 4am. Mostly cloudy, with a low around 59. North northwest wind 5 to 8 mph becoming south southwest after midnight. Chance of precipitation is 20%.
Saturday
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 82. Breezy, with a west southwest wind 5 to 10 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph.
Saturday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 57. South southwest wind 7 to 14 mph, with gusts as high as 24 mph.
Sunday
A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81. Breezy, with a southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph.
Sunday Night
Mostly clear, with a low around 50. Breezy, with a west wind 6 to 15 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Sunny, with a high near 84.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Mostly sunny, with a high near 84. Breezy.
Wednesday Night
Partly cloudy, with a low around 52. Breezy.
Thursday
Mostly sunny, with a high near 83. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.04°N 108.41°W (Elev. 5046 ft)
Last Update:
1:48 am MDT Aug 28, 2026
Forecast Valid:
3am MDT Aug 28, 2026-6pm MDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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