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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

61°F

16°C

Humidity 51%
Wind Speed NW 10 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 18 Aug 03:05 AM MDT
Extended Forecast for

7 Miles WNW Riverton Regional Airport WY

  • Overnight

    Overnight: Mostly clear, with a low around 55. West northwest wind around 6 mph.

    Low: 55 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91. West northwest wind around 6 mph becoming calm.

    High: 91 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. South wind around 7 mph becoming west after midnight.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 95. Calm wind becoming east southeast 5 to 9 mph in the afternoon.

    High: 95 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. East southeast wind 6 to 9 mph becoming west in the evening.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Light and variable wind becoming north 5 to 9 mph in the afternoon.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60. West wind 7 to 10 mph.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 10 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 56.

    Low: 56 °F

    Slight Chance
    T-storms then
    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 55. West northwest wind around 6 mph.
Monday
Sunny, with a high near 91. West northwest wind around 6 mph becoming calm.
Monday Night
Mostly clear, with a low around 54. South wind around 7 mph becoming west after midnight.
Tuesday
Sunny, with a high near 95. Calm wind becoming east southeast 5 to 9 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 56. East southeast wind 6 to 9 mph becoming west in the evening.
Wednesday
Sunny, with a high near 96. Light and variable wind becoming north 5 to 9 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 60. West wind 7 to 10 mph.
Thursday
Mostly sunny, with a high near 91.
Thursday Night
A 10 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 56.
Friday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 55.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 85.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles WNW Riverton Regional Airport WY
 43.09°N 108.57°W (Elev. 5335 ft)
Last Update:
12:42 am MDT Aug 18, 2025
Forecast Valid:
3am MDT Aug 18, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation