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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Boulder Municipal Airport (KBDU)

Lat: 40.04°NLon: 105.23°WElev: 5288ft.

Partly Cloudy

70°F

21°C

Humidity 69%
Wind Speed Calm
Barometer 30.24 in
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 17 Sep 1:35 pm MDT
Extended Forecast for

Boulder CO

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a steady temperature around 74. Calm wind becoming southwest around 5 mph. Chance of precipitation is 60%.

    High: 74 °F

    Showers
    Likely

  • Tonight

    Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 61. West wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: A chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%.

    High: 80 °F

    Partly Sunny
    then Showers
    Likely

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 56. Light and variable wind. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Light and variable wind. Chance of precipitation is 70%.

    High: 78 °F

    Mostly Sunny
    then Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.

    Low: 52 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 74. Chance of precipitation is 50%.

    High: 74 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers before midnight. Partly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a steady temperature around 74. Calm wind becoming southwest around 5 mph. Chance of precipitation is 60%.
Tonight
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 61. West wind 3 to 5 mph. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms between noon and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 80. Calm wind becoming west southwest 5 to 7 mph in the afternoon. Chance of precipitation is 70%.
Friday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 56. Light and variable wind. Chance of precipitation is 40%.
Saturday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 78. Light and variable wind. Chance of precipitation is 70%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 74. Chance of precipitation is 50%.
Sunday Night
A chance of showers before midnight. Partly cloudy, with a low around 50.
Monday
Mostly sunny, with a high near 75.
Monday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 52.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 77.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Boulder CO
 40.02°N 105.28°W (Elev. 5400 ft)
Last Update:
12:46 pm MDT Sep 17, 2026
Forecast Valid:
1pm MDT Sep 17, 2026-6pm MDT Sep 23, 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