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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

70°F

21°C

Humidity 40%
Wind Speed NNW 6 MPH
Barometer 30.29 in (1025.74 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 01 Aug 08:20 AM MDT
Extended Forecast for

Riverton WY

Fire Weather Watch August 2, 01:00pm until August 2, 09:00pm
Heat Advisory August 1, 12:00pm until August 2, 10:00pm
Click here for hazard details and duration
Fire Weather Watch
Heat Advisory

  • Today

    Today: Patchy smoke. Sunny and hot, with a high near 100. Calm wind becoming east around 5 mph in the afternoon.

    High: 100 °F

    Patchy Smoke

  • Tonight

    Tonight: Patchy smoke before midnight. Partly cloudy, with a low around 61. East wind 5 to 8 mph becoming west in the evening.

    Low: 61 °F

    Patchy Smoke
    then Partly
    Cloudy

  • Sunday

    Sunday: Increasing clouds and hot, with a high near 103. Breezy, with a light and variable wind becoming west southwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 103 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61. Breezy, with a west wind 12 to 17 mph becoming west northwest 6 to 11 mph after midnight. Winds could gust as high as 29 mph.

    Low: 61 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 87. Breezy, with a north northeast wind 14 to 20 mph, with gusts as high as 29 mph.

    High: 87 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. Breezy, with a north wind 17 to 22 mph becoming east 6 to 11 mph after midnight. Winds could gust as high as 32 mph.

    Low: 52 °F

    Clear and
    Breezy then
    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. East wind 6 to 10 mph.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Today
Patchy smoke. Sunny and hot, with a high near 100. Calm wind becoming east around 5 mph in the afternoon.
Tonight
Patchy smoke before midnight. Partly cloudy, with a low around 61. East wind 5 to 8 mph becoming west in the evening.
Sunday
Increasing clouds and hot, with a high near 103. Breezy, with a light and variable wind becoming west southwest 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 61. Breezy, with a west wind 12 to 17 mph becoming west northwest 6 to 11 mph after midnight. Winds could gust as high as 29 mph.
Monday
Sunny, with a high near 87. Breezy, with a north northeast wind 14 to 20 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 52. Breezy, with a north wind 17 to 22 mph becoming east 6 to 11 mph after midnight. Winds could gust as high as 32 mph.
Tuesday
Sunny, with a high near 85. East wind 6 to 10 mph.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny and hot, with a high near 97.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny and hot, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Riverton WY
 43.02°N 108.41°W (Elev. 5003 ft)
Last Update:
6:47 am MDT Aug 1, 2026
Forecast Valid:
8am MDT Aug 1, 2026-6pm MDT Aug 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

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Chance of Precipitation