Weather Forecast for Boulder

Colorado, United States of America

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Sunny

Current Weather - Boulder: 27°C

Colorado, United States of America

Sunny

Feels like 26°C

Wind

4 km/h NE

Humidity

34%

Pressure

1021 mb

UV Index

9

Visibility

16 km

Sunny

Sunny

Friday, July 03, 2026

High

33°C

Low

13°C

Rain Chance

1%

Hourly Forecast

Sunny 22°C
20:00
Clear 16°C
21:00
Clear 17°C
22:00
Clear 18°C
23:00
Jul 04

Day Statistics

Maximum Wind

25 km/h

Humidity

14%

Precipitation

0 mm

UV Index

9

Visibility

10 km

Rain Chance

1%

Snow Chance

0%

Sun & Moon

Sunrise

05:37 AM

Sunset

08:33 PM

Moonrise

11:04 PM

Moonset

09:15 AM

Moon Phase

Waning Gibbous

Moon Illumination

79%

Air Quality

PM2.5

15.9

μg/m³

PM10

18.6

μg/m³

NO₂

9.7

μg/m³

O₃

109.9

μg/m³

SO₂

0.8

μg/m³

CO

172.8

μg/m³

US EPA Index: 2 GB DEFRA Index: 2

Solar Radiation Data

Shortwave Radiation

574.06

Diffuse Radiation

52.74

DNI

0

GTI

0

Weather Alerts

Air Quality Alert issued July 2 at 9:10AM MDT by NWS Denver CO

Grand, CO; Gilpin, CO; Summit, CO; Jackson, CO; Park, CO; Clear Creek, CO Jul 2, 09:10 AM - Jul 3, 09:00 AM
Severity: Unknown Urgency: Unknown

The Colorado Department of Public Health and Environment has issued the following... WHAT...Air Quality Health Advisory for Wildfire Smoke. WHERE...Moffat, Routt, Jackson, Grand, Rio Blanco, Garfield, Eagle, Summit, Gilpin, Clear Creek, Mesa, Pitkin, Lake, Park, Delta, Gunnison, Chaffee, Montrose, Ouray, San Miguel, Dolores, and northern parts of Montezuma and Saguache Counties. Locations include, but are not limited to Craig, Steamboat Springs, Walden, Granby, Hot Sulphur Springs, Kremmling, Meeker, Rangely, Glenwood Springs, Eagle, Vail, Breckenridge, Central City, Georgetown, Grand Junction, Aspen, Leadville, Fairplay, Delta, Gunnison, Buena Vista, Salida, Montrose, Nucla, Ouray, Telluride, Dove Creek, Cortez and Saguache. WHEN...900 AM Thursday July 02 to 900 AM Friday July 03 IMPACTS...Areas downwind of large fires in southwestern Colorado and southeastern Utah could have periods of moderate to heavy smoke through at least Friday morning. HEALTH INFORMATION...Public Health Recommendations: If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and older adults. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy.

Event: Air Quality Alert Certainty: Unknown Category: Met

Air Quality Alert issued July 2 at 2:10PM MDT by NWS Denver CO

Grand, CO; Jackson, CO; Park, CO; Gilpin, CO; Summit, CO; Clear Creek, CO Jul 2, 02:10 PM - Jul 3, 09:00 AM
Severity: Unknown Urgency: Unknown

The Colorado Department of Public Health and Environment has issued the following... WHAT...Air Quality Health Advisory for Wildfire Smoke. WHERE...Moffat, Routt, Jackson, Grand, Rio Blanco, Garfield, Eagle, Summit, Gilpin, Clear Creek, Mesa, Pitkin, Lake, Park, Delta, Gunnison, Chaffee, Montrose, Ouray, San Miguel, Dolores, and northern parts of Montezuma and Saguache Counties. Locations include, but are not limited to Craig, Steamboat Springs, Walden, Granby, Hot Sulphur Springs, Kremmling, Meeker, Rangely, Glenwood Springs, Eagle, Vail, Breckenridge, Central City, Georgetown, Grand Junction, Aspen, Leadville, Fairplay, Delta, Gunnison, Buena Vista, Salida, Montrose, Nucla, Ouray, Telluride, Dove Creek, Cortez and Saguache. WHEN...900 AM Thursday July 02 to 900 AM Friday July 03 IMPACTS...Areas downwind of large fires in southwestern Colorado and southeastern Utah could have periods of moderate to heavy smoke through at least Friday morning. HEALTH INFORMATION...Public Health Recommendations: If smoke is thick or becomes thick in your neighborhood you may want to remain indoors. This is especially true for those with heart disease, respiratory illnesses, the very young, and older adults. Consider limiting outdoor activity when moderate to heavy smoke is present. Consider relocating temporarily if smoke is present indoors and is making you ill. If visibility is less than 5 miles in smoke in your neighborhood, smoke has reached levels that are unhealthy.

Event: Air Quality Alert Certainty: Unknown Category: Met