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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Overcast

44°F

7°C

Humidity 78%
Wind Speed N 9 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 12 Oct 01:53 PM MDT
Extended Forecast for

Riverton WY

  • Columbus Day

    Columbus Day: A slight chance of showers before 3pm, then a chance of showers after 4pm. Patchy fog. Otherwise, mostly sunny early, then becoming cloudy, with a high near 50. North northeast wind around 6 mph. Chance of precipitation is 50%.

    High: 50 °F

    Chance
    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers, mainly before midnight. Patchy fog before 10pm. Low around 42. North wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Showers and
    Patchy Fog
    then Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before 8am, then a chance of showers after 2pm. Mostly cloudy, with a high near 55. North wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers. Low around 36. North wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Showers

  • Wednesday

    Wednesday: Showers likely, mainly before noon. Mostly cloudy, with a high near 53. North northwest wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 37. Calm wind becoming north northwest 5 to 7 mph after midnight.

    Low: 37 °F

    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers before noon. Sunny, with a high near 56. Breezy, with a north wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 56 °F

    Slight Chance
    Showers then
    Sunny and
    Breezy

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

Columbus Day
A slight chance of showers before 3pm, then a chance of showers after 4pm. Patchy fog. Otherwise, mostly sunny early, then becoming cloudy, with a high near 50. North northeast wind around 6 mph. Chance of precipitation is 50%.
Tonight
Showers, mainly before midnight. Patchy fog before 10pm. Low around 42. North wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A chance of showers before 8am, then a chance of showers after 2pm. Mostly cloudy, with a high near 55. North wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers. Low around 36. North wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Showers likely, mainly before noon. Mostly cloudy, with a high near 53. North northwest wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 37. Calm wind becoming north northwest 5 to 7 mph after midnight.
Thursday
A 20 percent chance of showers before noon. Sunny, with a high near 56. Breezy, with a north wind 7 to 15 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 29.
Friday
Sunny, with a high near 60.
Friday Night
Clear, with a low around 30.
Saturday
Sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.38°W (Elev. 4931 ft)
Last Update:
12:32 pm MDT Oct 12, 2026
Forecast Valid:
2pm MDT Oct 12, 2026-6pm MDT Oct 18, 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