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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

70°F

21°C

Humidity 22%
Wind Speed NE 2 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 04 Oct 01:15 PM MDT
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Sunny, with a high near 77. Calm wind becoming southwest 5 to 8 mph.

    High: 77 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 41. Southwest wind 6 to 8 mph becoming southeast after midnight.

    Low: 41 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 76. Light and variable wind becoming west 5 to 10 mph in the afternoon.

    High: 76 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. West southwest wind 5 to 7 mph becoming south southeast after midnight.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77. Calm wind becoming west around 6 mph in the afternoon.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. West wind around 5 mph becoming south southeast after midnight.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Calm wind becoming west around 6 mph in the afternoon.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 77. Calm wind becoming southwest 5 to 8 mph.
Tonight
Mostly clear, with a low around 41. Southwest wind 6 to 8 mph becoming southeast after midnight.
Monday
Mostly sunny, with a high near 76. Light and variable wind becoming west 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 46. West southwest wind 5 to 7 mph becoming south southeast after midnight.
Tuesday
Sunny, with a high near 77. Calm wind becoming west around 6 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 45. West wind around 5 mph becoming south southeast after midnight.
Wednesday
Sunny, with a high near 75. Calm wind becoming west around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 45.
Thursday
Sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 44.
Friday
Sunny, with a high near 73.
Friday Night
Mostly clear, with a low around 45.
Saturday
A slight chance of showers. Mostly sunny, with a high near 68. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
12:31 pm MDT Oct 4, 2026
Forecast Valid:
1pm MDT Oct 4, 2026-6pm MDT Oct 10, 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