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

Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Mostly Cloudy

59°F

15°C

Humidity 66%
Wind Speed S 10 MPH
Barometer 29.69 in (1005.42 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 10 Oct 04:53 PM MDT
Extended Forecast for

Riverton WY

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Partly sunny, with a steady temperature around 69. Breezy, with a southwest wind around 17 mph, with gusts as high as 28 mph.

    High: 69 °F

    Slight Chance
    Showers and
    Breezy

  • Tonight

    Tonight: A 30 percent chance of showers, mainly before 4am. Increasing clouds, with a low around 51. Breezy, with a south wind 10 to 16 mph, with gusts as high as 26 mph.

    Low: 51 °F

    Breezy.
    Increasing
    Clouds then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 64. Breezy, with a south southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 64 °F

    Breezy.
    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 4am, then a slight chance of showers between 4am and 5am. Cloudy during the early evening, then gradual clearing, with a low around 42. Breezy, with a light and variable wind becoming west southwest 13 to 18 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 42 °F

    Showers
    Likely then
    Chance
    Showers and
    Breezy

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 62. Breezy, with a southwest wind 10 to 17 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 62 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Showers likely, mainly after midnight. Mostly cloudy, with a low around 37. North wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 37 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 58. North wind 3 to 7 mph. Chance of precipitation is 40%.

    High: 58 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Partly sunny, with a steady temperature around 69. Breezy, with a southwest wind around 17 mph, with gusts as high as 28 mph.
Tonight
A 30 percent chance of showers, mainly before 4am. Increasing clouds, with a low around 51. Breezy, with a south wind 10 to 16 mph, with gusts as high as 26 mph.
Sunday
A chance of showers before noon, then showers likely and possibly a thunderstorm between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 64. Breezy, with a south southwest wind 10 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms likely before 4am, then a slight chance of showers between 4am and 5am. Cloudy during the early evening, then gradual clearing, with a low around 42. Breezy, with a light and variable wind becoming west southwest 13 to 18 mph in the evening. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Columbus Day
Mostly sunny, with a high near 62. Breezy, with a southwest wind 10 to 17 mph becoming north northwest in the afternoon. Winds could gust as high as 24 mph.
Monday Night
Showers likely, mainly after midnight. Mostly cloudy, with a low around 37. North wind 5 to 10 mph. Chance of precipitation is 60%.
Tuesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 58. North wind 3 to 7 mph. Chance of precipitation is 40%.
Tuesday Night
Showers and possibly a thunderstorm. Low around 37. Chance of precipitation is 80%.
Wednesday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 55. Chance of precipitation is 60%.
Wednesday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 35.
Thursday
A chance of showers. Mostly sunny, with a high near 58.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 33.
Saturday
Sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.38°W (Elev. 4931 ft)
Last Update:
4:33 pm MDT Oct 10, 2026
Forecast Valid:
5pm MDT Oct 10, 2026-6pm MDT Oct 17, 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