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

66°F

19°C

Humidity 56%
Wind Speed SE 17 G 22 mph
Barometer 29.73 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 27 Jun 7:35 am MDT
Extended Forecast for

Newcastle WY

  • Today

    Today: Mostly sunny, with a high near 85. Southeast wind 8 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 56. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.

    Low: 56 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 80. Light and variable wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 29 mph.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. South wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 60%.

    Low: 54 °F

    Showers
    Likely

  • Monday

    Monday: A 20 percent chance of showers after noon. Sunny, with a high near 77. Breezy, with a light west wind becoming southwest 23 to 28 mph in the morning. Winds could gust as high as 39 mph.

    High: 77 °F

    Breezy.
    Mostly Sunny
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. Breezy, with a southwest wind 20 to 25 mph becoming light and variable after midnight. Winds could gust as high as 37 mph.

    Low: 51 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 85. Southeast wind 8 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph.
Tonight
A 40 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 56. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Sunday
Sunny, with a high near 80. Light and variable wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 29 mph.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. South wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 60%.
Monday
A 20 percent chance of showers after noon. Sunny, with a high near 77. Breezy, with a light west wind becoming southwest 23 to 28 mph in the morning. Winds could gust as high as 39 mph.
Monday Night
Mostly clear, with a low around 51. Breezy, with a southwest wind 20 to 25 mph becoming light and variable after midnight. Winds could gust as high as 37 mph.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 55.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 59.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 63.
Friday
Mostly sunny, with a high near 93.
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:
6:57 am MDT Jun 27, 2026
Forecast Valid:
7am MDT Jun 27, 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