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

68°F

20°C

Humidity 43%
Wind Speed Calm
Barometer 29.75 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 26 Jun 9:35 pm MDT
Extended Forecast for

Newcastle WY

  • Tonight

    Tonight: A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 63. East wind 11 to 18 mph, with gusts as high as 28 mph.

    Low: 63 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, then gradually becoming sunny, with a high near 85. East wind 8 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 85 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 56. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.

    Low: 56 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 83. Light and variable wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 24 mph.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Partly cloudy, with a low around 56. South wind 5 to 8 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%.

    Low: 56 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Monday

    Monday: Sunny, with a high near 77. Breezy, with a northwest wind 5 to 10 mph becoming southwest 18 to 28 mph. Winds could gust as high as 39 mph.

    High: 77 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 52. Breezy.

    Low: 52 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers before midnight. Mostly cloudy, then gradually becoming mostly clear, with a steady temperature around 63. East wind 11 to 18 mph, with gusts as high as 28 mph.
Saturday
A 20 percent chance of showers and thunderstorms after 3pm. Partly sunny, then gradually becoming sunny, with a high near 85. East wind 8 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 56. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 24 mph.
Sunday
Sunny, with a high near 83. Light and variable wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 24 mph.
Sunday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Partly cloudy, with a low around 56. South wind 5 to 8 mph becoming north after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Monday
Sunny, with a high near 77. Breezy, with a northwest wind 5 to 10 mph becoming southwest 18 to 28 mph. Winds could gust as high as 39 mph.
Monday Night
Mostly clear, with a low around 52. Breezy.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 56.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Sunny, with a high near 90.
Thursday Night
Mostly clear, with a low around 62.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 92.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newcastle WY
 43.86°N 104.21°W (Elev. 4380 ft)
Last Update:
9:22 pm MDT Jun 26, 2026
Forecast Valid:
10pm MDT Jun 26, 2026-6pm MDT Jul 3, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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