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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Boulder Municipal Airport (KBDU)

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

Partly Cloudy

61°F

16°C

Humidity 34%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 18 Jun 1:35 am MDT
Extended Forecast for

3 Miles SW Boulder CO

  • Overnight

    Overnight: Mostly clear, with a low around 51. Northeast wind around 5 mph becoming calm.

    Low: 51 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83. Calm wind becoming east northeast around 6 mph in the morning.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59. West wind around 6 mph becoming calm after midnight.

    Low: 59 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly cloudy, then gradually becoming sunny, with a high near 83. Calm wind becoming east around 6 mph in the morning.

    High: 83 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. East wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.

    High: 89 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 51. Northeast wind around 5 mph becoming calm.
Thursday
Sunny, with a high near 83. Calm wind becoming east northeast around 6 mph in the morning.
Thursday Night
Partly cloudy, with a low around 59. West wind around 6 mph becoming calm after midnight.
Juneteenth
Mostly cloudy, then gradually becoming sunny, with a high near 83. Calm wind becoming east around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 62. East wind around 5 mph becoming calm in the evening.
Saturday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 60.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 83.
Sunday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 53.
Monday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 56.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Boulder CO
 40°N 105.3°W (Elev. 6509 ft)
Last Update:
12:46 am MDT Jun 18, 2026
Forecast Valid:
1am MDT Jun 18, 2026-6pm MDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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