Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

49°F

9°C

Humidity 42%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Wind Chill47°F (8°C)
Last update 20 Mar 09:15 PM MDT
Extended Forecast for

Mammoth WY

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Southeast wind 8 to 10 mph.

    Low: 43 °F

    Partly Cloudy

  • Saturday

    Saturday: Isolated showers and thunderstorms after 3pm.  Increasing clouds, with a high near 64. Southeast wind 8 to 13 mph becoming west in the afternoon.  Chance of precipitation is 20%.

    High: 64 °F

    Mostly Sunny
    then Isolated
    T-storms

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms before 9pm, then scattered showers between 9pm and midnight.  Partly cloudy, with a low around 36. Northwest wind 5 to 10 mph.  Chance of precipitation is 30%.

    Low: 36 °F

    Scattered
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 55. West southwest wind 5 to 11 mph.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 35. West southwest wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 25 mph.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 57. South southwest wind 6 to 9 mph, with gusts as high as 22 mph.

    High: 57 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 38. South wind 5 to 8 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. Southeast wind 8 to 10 mph.
Saturday
Isolated showers and thunderstorms after 3pm. Increasing clouds, with a high near 64. Southeast wind 8 to 13 mph becoming west in the afternoon. Chance of precipitation is 20%.
Saturday Night
Scattered showers and thunderstorms before 9pm, then scattered showers between 9pm and midnight. Partly cloudy, with a low around 36. Northwest wind 5 to 10 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 55. West southwest wind 5 to 11 mph.
Sunday Night
Partly cloudy, with a low around 35. West southwest wind 6 to 11 mph becoming south after midnight. Winds could gust as high as 25 mph.
Monday
Partly sunny, with a high near 57. South southwest wind 6 to 9 mph, with gusts as high as 22 mph.
Monday Night
Mostly cloudy, with a low around 38. South wind 5 to 8 mph.
Tuesday
Partly sunny, with a high near 62.
Tuesday Night
Mostly cloudy, with a low around 44.
Wednesday
Mostly sunny, with a high near 65. Breezy.
Wednesday Night
Partly cloudy, with a low around 35.
Thursday
Mostly sunny, with a high near 51.
Thursday Night
Mostly clear, with a low around 28.
Friday
Sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
8:34 pm MDT Mar 20, 2026
9pm MDT Mar 20, 2026-6pm MDT Mar 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

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