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.

Overcast

12°F

-11°C

Humidity 73%
Wind Speed Calm
Barometer 30.13 in
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Last update 30 Nov 3:35 pm MST
Extended Forecast for

Newcastle WY

  • This Afternoon

    This Afternoon: A 10 percent chance of snow after 5pm. Cloudy, with a high near 22. Wind chill values as low as 2. Light south wind.

    High: 22 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: A 20 percent chance of snow before 8pm. Cloudy during the early evening, then gradual clearing, with a steady temperature around 9. Wind chill values as low as zero. Southeast wind around 5 mph becoming calm in the evening.

    Low: 9 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 28. Wind chill values as low as zero. Northwest wind 3 to 8 mph.

    High: 28 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a temperature falling to near 17 by 8pm, then rising to around 22 during the remainder of the night. Light northeast wind.

    Low: 17 °F⇑

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 37. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 17 mph.

    High: 37 °F

    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 18. Northwest wind 10 to 14 mph, with gusts as high as 23 mph. New snow accumulation of less than a half inch possible.

    Low: 18 °F

    Chance Snow

  • Wednesday

    Wednesday: A 20 percent chance of snow before 11am. Mostly sunny, with a high near 26. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 26 °F

    Slight Chance
    Snow then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 11. Light and variable wind.

    Low: 11 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 10 percent chance of snow after 5pm. Cloudy, with a high near 22. Wind chill values as low as 2. Light south wind.
Tonight
A 20 percent chance of snow before 8pm. Cloudy during the early evening, then gradual clearing, with a steady temperature around 9. Wind chill values as low as zero. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 28. Wind chill values as low as zero. Northwest wind 3 to 8 mph.
Monday Night
Mostly cloudy, with a temperature falling to near 17 by 8pm, then rising to around 22 during the remainder of the night. Light northeast wind.
Tuesday
A 20 percent chance of snow after 11am. Mostly cloudy, with a high near 37. Calm wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 17 mph.
Tuesday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 18. Northwest wind 10 to 14 mph, with gusts as high as 23 mph. New snow accumulation of less than a half inch possible.
Wednesday
A 20 percent chance of snow before 11am. Mostly sunny, with a high near 26. Northwest wind 7 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 11. Light and variable wind.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Mostly cloudy, with a low around 19.
Friday
Partly sunny, with a high near 35.
Friday Night
A chance of snow. Mostly cloudy, with a low around 21.
Saturday
A chance of snow. Partly sunny, with a high near 36.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 34.
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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:
3:37 pm MST Nov 30, 2025
Forecast Valid:
3pm MST Nov 30, 2025-6pm MST Dec 7, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation