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

Mondell Field (KECS)

Lat: 43.89°NLon: 104.32°WElev: 4173ft.

Fair

72°F

22°C

Humidity 36%
Wind Speed SE 3 mph
Barometer 29.99 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 2 Sep 8:15 am MDT
Extended Forecast for

Newcastle WY

  • Today

    Today: Sunny, with a high near 87. Light and variable wind becoming southwest 12 to 17 mph in the morning. Winds could gust as high as 26 mph.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 59. Southwest wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 88. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 88 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62. Southwest wind 5 to 9 mph becoming east after midnight. Winds could gust as high as 20 mph.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 24 mph.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. South wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 87. Light and variable wind becoming southwest 12 to 17 mph in the morning. Winds could gust as high as 26 mph.
Tonight
Mostly clear, with a low around 59. Southwest wind 10 to 15 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.
Thursday
Sunny, with a high near 88. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
Mostly clear, with a low around 62. Southwest wind 5 to 9 mph becoming east after midnight. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 92. Light and variable wind becoming south 9 to 14 mph in the morning. Winds could gust as high as 24 mph.
Friday Night
Mostly clear, with a low around 64. South wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.
Saturday
Sunny, with a high near 91.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 85.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Labor Day
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.24°W (Elev. 4334 ft)
Last Update:
7:26 am MDT Sep 2, 2026
Forecast Valid:
8am MDT Sep 2, 2026-6pm MDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation