Autumn Temperatures for Eastern Third of the Country; Developing Offshore Coastal Storm

Cooler and less humid conditions for most of the eastern third of the nation as high pressure dominates the weather pattern. Otherwise, rather tranquil weather for most of the nation for the end of the weekend into the start of this week. We continue to monitor a developing coastal storm offshore of the Carolinas; Coastal flooding and beach erosion possible along portions of the Mid-Atlantic. Read More >

Current conditions at

Riverton Regional Airport (KRIW)

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

Clear

48°F

9°C

Humidity 66%
Wind Speed E 3 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 18 Oct 11:05 AM MDT
Extended Forecast for

Arapahoe WY

  • Today

    Today: Sunny, with a high near 61. Calm wind becoming northeast around 5 mph.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 34. Light and variable wind becoming west northwest around 6 mph in the evening.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 65. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. North northeast wind around 5 mph becoming light and variable  after midnight.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39. Northeast wind around 5 mph becoming light and variable  in the evening.

    Low: 39 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 66. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 61. Calm wind becoming northeast around 5 mph.
Tonight
Mostly clear, with a low around 34. Light and variable wind becoming west northwest around 6 mph in the evening.
Monday
Sunny, with a high near 65. Calm wind becoming northeast around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 37. North northeast wind around 5 mph becoming light and variable after midnight.
Tuesday
Sunny, with a high near 66. Calm wind becoming east northeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 39. Northeast wind around 5 mph becoming light and variable in the evening.
Wednesday
Sunny, with a high near 66. Calm wind becoming northwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 48. Breezy.
Friday
A chance of showers. Mostly sunny, with a high near 63. Breezy.
Friday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 39.
Saturday
A slight chance of rain and snow showers. Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Arapahoe WY
 42.97°N 108.49°W (Elev. 5036 ft)
10:17 am MDT Oct 18, 2026
11am MDT Oct 18, 2026-6pm MDT Oct 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database