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.

Partly Cloudy

66°F

19°C

Humidity 60%
Wind Speed N 5 mph
Barometer 30.17 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 15 Aug 12:35 am MDT
Extended Forecast for

Newcastle WY

  • Overnight

    Overnight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 59. Light north wind. Chance of precipitation is 40%.

    Low: 59 °F

    Scattered
    Showers

  • Saturday

    Saturday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 74. Northwest wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 50%.

    High: 74 °F

    Scattered
    Showers then
    Scattered
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. Light and variable wind.

    Low: 54 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Light and variable wind becoming south 5 to 7 mph. Winds could gust as high as 15 mph.

    High: 80 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 55. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 55 °F

    Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 84. Calm wind becoming southwest around 6 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 84 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.

    Low: 57 °F

    Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 81.

    High: 81 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Overnight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 59. Light north wind. Chance of precipitation is 40%.
Saturday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 74. Northwest wind around 5 mph becoming calm in the afternoon. Chance of precipitation is 50%.
Saturday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. Light and variable wind.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Light and variable wind becoming south 5 to 7 mph. Winds could gust as high as 15 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 55. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Monday
Mostly sunny, with a high near 84. Calm wind becoming southwest around 6 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 81.
Tuesday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 53.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 78.
Wednesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 54.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.21°W (Elev. 4380 ft)
Last Update:
12:31 am MDT Aug 15, 2026
Forecast Valid:
12am MDT Aug 15, 2026-6pm MDT Aug 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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