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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

070W10895RWS1RP1 at Canyon Creek Rd (CO099)

Lat: 39.5739°NLon: 107.45295°WElev: 5679.0ft.

NA

68°F

20°C

Humidity 63%
Wind Speed E 3 MPH
Barometer NA
Dewpoint 55°F (13°C)
Visibility NA
Last update 15 Sep 04:36 PM MDT
Extended Forecast for

New Castle CO

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly after 10am. Partly sunny, with a high near 77. Calm wind becoming east southeast around 5 mph.

    High: 77 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 49. Calm wind becoming east around 5 mph. Chance of precipitation is 60%.

    Low: 49 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. East wind around 5 mph becoming west southwest in the afternoon. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 74. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly after 10am. Partly sunny, with a high near 77. Calm wind becoming east southeast around 5 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 49. Calm wind becoming east around 5 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm before noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. East wind around 5 mph becoming west southwest in the afternoon. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 45. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Sunday
Sunny, with a high near 74. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 46.
Tuesday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 78.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 46.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Mostly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
New Castle CO
 39.59°N 107.53°W (Elev. 5935 ft)
Last Update:
4:42 am MDT Sep 18, 2026
Forecast Valid:
6am MDT Sep 18, 2026-6pm MDT Sep 24, 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