How is the weather in Boulder, CO?

At 4:45 PM on Thu, Sep 18, 2025 it is sunny and 73 degrees Fahrenheit, feeling like 73 degrees.

Boulder, CO Weather Forecast and Current Conditions (80301)

73°F
Feels Like 73°F

Humidity 40% Dew Point 47°F Wind SSW 1 MPH Gusts 4 Barometer 29.86 in.758.4 mm

Solar Rad 356 w/m2 UV Index 3.74

Report from 0.8 miles WNW of central Boulder at 4:45 PM Thu, Sep 18, 2025

Current Weather

73°F
Feels Like 73°F

Humidity 40% Dew Point 47°F Wind SSW 1 MPH Gusts 4 Barometer 29.86 in.758.4 mm

Solar Rad 356 w/m2 UV Index 3.74

Report from 0.8 miles WNW of central Boulder at 4:45 PM Thu, Sep 18, 2025

Forecast at a Glance

ThuSep 18

72°

48°

FriSep 19

82°

53°

SatSep 20

20%

81°

55°

SunSep 21

20%

82°

53°

MonSep 22

30%

76°

45°

TueSep 23

10%

74°

47°

WedSep 24

10%

78°

49°

This Date in Weather History

1926 - The great ""Miami Hurricane"" produced winds reaching 138 mph which drove ocean waters into the Biscayne Bay drowning 135 persons. The eye of the hurricane passed over Miami, at which time the barometric pressure reached 27.61 inches. Tides up to twelve feet high accompanied the hurricane, which claimed a total of 372 lives.

Boulder 7 Day Weather Forecast Details

Thursday Sep 18

Day: Sunny, with a high near 72. East wind around 10 mph.

Night: Mostly clear, with a low around 48. West southwest wind around 6 mph.

Friday Sep 19

Day: Mostly sunny. High near 82, with temperatures falling to around 78 in the afternoon. South southwest wind around 5 mph.

Night: Mostly cloudy, with a low around 53. West northwest wind around 5 mph.

Saturday Sep 20

Day: A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 81. North northwest wind around 5 mph. Chance of precipitation is 20%.

Night: Partly cloudy, with a low around 55.

Sunday Sep 21

Day: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.

Night: Partly cloudy, with a low around 53.

Monday Sep 22

Day: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 76.

Night: A slight chance of rain showers before midnight. Partly cloudy, with a low around 45.

Tuesday Sep 23

Day: Sunny, with a high near 74.

Night: Mostly clear, with a low around 47.

Wednesday Sep 24

Day: Sunny, with a high near 78.

Night: Mostly clear, with a low around 49.

Sun & Moon Monthly

First Light 6:19 AM

Sunrise 6:46 AM

Sunset 7:06 PM

Last Light 7:33 PM

Moonrise 3:22 AM

Moonset 5:53 PM

Moon Phase

Campground Weather - Check Reports for 8800+ Locations

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Weather Near Boulder

Contiguous United States Extremes

Wed's High Temperature
114 at Death Valley, CA

Thu's Low Temperature
19 at Peter Sinks, UT

Weather Folklore

If cumulus clouds are smaller at sunset than at noon, expect fair weather.

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About Boulder, Colorado

Boulder is a home rule city in Boulder County, Colorado, United States, and its county seat. With a population of 108,250 at the 2020 census, it is the most populous city in the county and the 12th-most populous city in Colorado. It is the principal city of the Boulder metropolitan statistical area, which had 330,758 residents in 2020 and is part of the Front Range Urban Corridor.

Boulder is located at the base of the foothills of the Rocky Mountains, at an elevation of 5,430 feet (1,655 m) above sea level. The city is 25 miles (40 km) northwest of the Colorado state capital of Denver. Boulder is a college town, hosting the University of Colorado Boulder, the flagship and largest campus of the University of Colorado system as well as numerous research institutes. Starting in 2027, Boulder will become the new home of the Sundance Film Festival.

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