Weather Forecast for Boulder
Colorado, United States of America
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Current Weather - Boulder: 20°C
Current Weather - Boulder: 20°C
Colorado, United States of America
Clear
Feels like 20°C
Wind
13 km/h W
Humidity
83%
Pressure
1021 mb
UV Index
0
Visibility
16 km
Sunny
Friday, July 24, 2026
High
34°C
Low
16°C
Rain Chance
17%
Hourly Forecast
30°C
32°C
32°C
33°C
34°C
34°C
33°C
33°C
32°C
24°C
23°C
22°C
22°C
Day Statistics
Maximum Wind
15 km/h
Humidity
42%
Precipitation
0 mm
UV Index
11
Visibility
10 km
Rain Chance
17%
Snow Chance
0%
Sun & Moon
Sunrise
05:52 AM
Sunset
08:22 PM
Moonrise
05:24 PM
Moonset
01:26 AM
Moon Phase
Waxing Gibbous
Moon Illumination
82%
Air Quality
PM2.5
6.1
μg/m³
PM10
6.6
μg/m³
NO₂
7.8
μg/m³
O₃
81.8
μg/m³
SO₂
0.4
μg/m³
CO
128.5
μg/m³
Sunny
Saturday, July 25, 2026
High
37°C
Low
20°C
Rain Chance
3%
Hourly Forecast
22°C
21°C
21°C
21°C
20°C
20°C
20°C
21°C
29°C
32°C
34°C
35°C
36°C
36°C
37°C
36°C
36°C
36°C
35°C
29°C
24°C
23°C
22°C
21°C
Day Statistics
Maximum Wind
20 km/h
Humidity
30%
Precipitation
0 mm
UV Index
11
Visibility
10 km
Rain Chance
3%
Snow Chance
0%
Sun & Moon
Sunrise
05:53 AM
Sunset
08:22 PM
Moonrise
06:19 PM
Moonset
02:11 AM
Moon Phase
Waxing Gibbous
Moon Illumination
90%
Air Quality
PM2.5
5.5
μg/m³
PM10
5.7
μg/m³
NO₂
6.7
μg/m³
O₃
87
μg/m³
SO₂
0.4
μg/m³
CO
130.3
μg/m³
Sunny
Sunday, July 26, 2026
High
37°C
Low
19°C
Rain Chance
17%
Hourly Forecast
21°C
21°C
20°C
20°C
20°C
19°C
20°C
21°C
29°C
32°C
34°C
35°C
36°C
36°C
37°C
35°C
29°C
28°C
27°C
29°C
24°C
22°C
21°C
21°C
Day Statistics
Maximum Wind
21 km/h
Humidity
36%
Precipitation
0 mm
UV Index
11
Visibility
10 km
Rain Chance
17%
Snow Chance
0%
Sun & Moon
Sunrise
05:54 AM
Sunset
08:21 PM
Moonrise
07:06 PM
Moonset
03:04 AM
Moon Phase
Waxing Gibbous
Moon Illumination
95%
Air Quality
PM2.5
4.9
μg/m³
PM10
5.5
μg/m³
NO₂
7.6
μg/m³
O₃
81
μg/m³
SO₂
0.3
μg/m³
CO
116.2
μg/m³
Sunny
Monday, July 27, 2026
High
36°C
Low
19°C
Rain Chance
57%
Hourly Forecast
21°C
21°C
21°C
21°C
21°C
20°C
20°C
22°C
29°C
31°C
32°C
33°C
34°C
35°C
36°C
28°C
24°C
25°C
23°C
23°C
19°C
19°C
21°C
19°C
Day Statistics
Maximum Wind
37 km/h
Humidity
41%
Precipitation
7 mm
UV Index
11
Visibility
10 km
Rain Chance
57%
Snow Chance
0%
Sun & Moon
Sunrise
05:55 AM
Sunset
08:20 PM
Moonrise
07:45 PM
Moonset
04:02 AM
Moon Phase
Full Moon
Moon Illumination
99%
Air Quality
PM2.5
4.2
μg/m³
PM10
5.2
μg/m³
NO₂
7.5
μg/m³
O₃
80.8
μg/m³
SO₂
0.4
μg/m³
CO
123.8
μg/m³
Sunny
Tuesday, July 28, 2026
High
31°C
Low
17°C
Rain Chance
4%
Hourly Forecast
19°C
19°C
19°C
18°C
18°C
18°C
17°C
21°C
25°C
27°C
29°C
30°C
31°C
30°C
30°C
30°C
29°C
28°C
28°C
25°C
22°C
19°C
19°C
19°C
Day Statistics
Maximum Wind
20 km/h
Humidity
49%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
4%
Snow Chance
0%
Sun & Moon
Sunrise
05:55 AM
Sunset
08:19 PM
Moonrise
08:18 PM
Moonset
05:03 AM
Moon Phase
Full Moon
Moon Illumination
100%
Air Quality
PM2.5
4.7
μg/m³
PM10
5.2
μg/m³
NO₂
10.7
μg/m³
O₃
47.3
μg/m³
SO₂
0.4
μg/m³
CO
162.7
μg/m³
Sunny
Wednesday, July 29, 2026
High
33°C
Low
16°C
Rain Chance
58%
Hourly Forecast
19°C
18°C
18°C
17°C
17°C
17°C
16°C
20°C
23°C
26°C
28°C
29°C
31°C
32°C
32°C
33°C
31°C
29°C
27°C
24°C
21°C
17°C
18°C
18°C
Day Statistics
Maximum Wind
16 km/h
Humidity
50%
Precipitation
10 mm
UV Index
8
Visibility
10 km
Rain Chance
58%
Snow Chance
0%
Sun & Moon
Sunrise
05:56 AM
Sunset
08:18 PM
Moonrise
08:45 PM
Moonset
06:05 AM
Moon Phase
Full Moon
Moon Illumination
99%
Sunny
Thursday, July 30, 2026
High
34°C
Low
17°C
Rain Chance
3%
Hourly Forecast
18°C
17°C
17°C
17°C
17°C
17°C
17°C
20°C
24°C
27°C
28°C
30°C
31°C
32°C
33°C
34°C
31°C
28°C
25°C
23°C
21°C
19°C
19°C
19°C
Day Statistics
Maximum Wind
17 km/h
Humidity
54%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
3%
Snow Chance
0%
Sun & Moon
Sunrise
05:57 AM
Sunset
08:17 PM
Moonrise
09:09 PM
Moonset
07:07 AM
Moon Phase
Waning Gibbous
Moon Illumination
96%
Weather Alerts
Air Quality Alert issued July 23 at 4:10PM MDT by NWS Denver CO
The Colorado Department of Public Health and Environment has issued the following... WHAT...Ozone Action Day Alert. WHERE...Douglas, Jefferson, Denver, western Arapahoe, western Adams, Broomfield, Boulder, Larimer, and Weld Counties WHEN...400 PM Thursday July 23 to 400 PM Friday July 24 IMPACTS...Ozone Action Day Alert is now in effect for the Front Range Urban Corridor. Ozone will remain in the Good to Moderate range on Thursday. On Friday, hot and sunny weather will allow Ozone to reach the Unhealthy for Sensitive Groups category. For Colorado air quality conditions, forecasts, and advisories, visit: https://www.colorado.gov/airquality/colorado_summary.aspx If possible, please help us reduce ozone pollution by limiting driving gas and diesel-powered vehicles until at least 4 p.m. Friday, July 24, 2026. Colorado is also addressing ozone pollution through state policies. For more information about health impacts and how ozone pollution forms in Colorado, visit: https://cdphe.colorado.gov/ozone- pollution-and-your-health HEALTH INFORMATION...Increasing likelihood of respiratory symptoms and breathing discomfort in active children and adults and people with lung disease, such as asthma. Active children and adults, and people with lung disease, such as asthma, should reduce prolonged or heavy outdoor exertion.
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