Weather Forecast for Boulder
Colorado, United States of America
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Current Weather - Boulder: 4°C
Current Weather - Boulder: 4°C
Colorado, United States of America
Clear
Feels like 1°C
Wind
12 km/h WSW
Humidity
34%
Pressure
1010 mb
UV Index
0
Visibility
16 km
Sunny
Friday, April 24, 2026
High
21°C
Low
2°C
Rain Chance
0%
Hourly Forecast
19°C
20°C
20°C
20°C
19°C
18°C
14°C
11°C
9°C
7°C
5°C
Day Statistics
Maximum Wind
36 km/h
Humidity
21%
Precipitation
0 mm
UV Index
8
Visibility
10 km
Rain Chance
0%
Snow Chance
0%
Sun & Moon
Sunrise
06:10 AM
Sunset
07:49 PM
Moonrise
12:49 PM
Moonset
02:48 AM
Moon Phase
First Quarter
Moon Illumination
49%
Air Quality
PM2.5
3
μg/m³
PM10
6.2
μg/m³
NO₂
6.1
μg/m³
O₃
100.2
μg/m³
SO₂
1.4
μg/m³
CO
154.8
μg/m³
Patchy rain nearby
Saturday, April 25, 2026
High
14°C
Low
-2°C
Rain Chance
81%
Hourly Forecast
3°C
1°C
1°C
-0°C
-1°C
-2°C
0°C
2°C
3°C
5°C
6°C
8°C
10°C
12°C
13°C
13°C
13°C
11°C
9°C
7°C
6°C
5°C
5°C
4°C
Day Statistics
Maximum Wind
24 km/h
Humidity
68%
Precipitation
1 mm
UV Index
8
Visibility
9 km
Rain Chance
81%
Snow Chance
0%
Sun & Moon
Sunrise
06:09 AM
Sunset
07:50 PM
Moonrise
02:00 PM
Moonset
03:18 AM
Moon Phase
Waxing Gibbous
Moon Illumination
60%
Air Quality
PM2.5
4.9
μg/m³
PM10
7.7
μg/m³
NO₂
8.4
μg/m³
O₃
88.9
μg/m³
SO₂
2.2
μg/m³
CO
159.9
μg/m³
Moderate rain
Sunday, April 26, 2026
High
12°C
Low
2°C
Rain Chance
87%
Hourly Forecast
4°C
3°C
3°C
2°C
2°C
2°C
2°C
3°C
3°C
5°C
6°C
7°C
8°C
8°C
9°C
10°C
11°C
10°C
9°C
8°C
7°C
6°C
5°C
5°C
Day Statistics
Maximum Wind
13 km/h
Humidity
84%
Precipitation
17 mm
UV Index
8
Visibility
8 km
Rain Chance
87%
Snow Chance
0%
Sun & Moon
Sunrise
06:07 AM
Sunset
07:51 PM
Moonrise
03:07 PM
Moonset
03:44 AM
Moon Phase
Waxing Gibbous
Moon Illumination
70%
Air Quality
PM2.5
7.9
μg/m³
PM10
11.1
μg/m³
NO₂
7.5
μg/m³
O₃
92.3
μg/m³
SO₂
2.3
μg/m³
CO
168.8
μg/m³
Patchy rain nearby
Monday, April 27, 2026
High
11°C
Low
2°C
Rain Chance
89%
Hourly Forecast
4°C
4°C
3°C
3°C
3°C
3°C
3°C
2°C
2°C
2°C
3°C
3°C
4°C
6°C
8°C
9°C
10°C
10°C
10°C
9°C
7°C
6°C
5°C
4°C
Day Statistics
Maximum Wind
13 km/h
Humidity
85%
Precipitation
5 mm
UV Index
4
Visibility
8 km
Rain Chance
89%
Snow Chance
0%
Sun & Moon
Sunrise
06:06 AM
Sunset
07:52 PM
Moonrise
04:11 PM
Moonset
04:06 AM
Moon Phase
Waxing Gibbous
Moon Illumination
79%
Air Quality
PM2.5
4.7
μg/m³
PM10
6.4
μg/m³
NO₂
15.6
μg/m³
O₃
72
μg/m³
SO₂
1.8
μg/m³
CO
201.3
μg/m³
Patchy rain nearby
Tuesday, April 28, 2026
High
14°C
Low
-1°C
Rain Chance
87%
Hourly Forecast
4°C
4°C
4°C
2°C
1°C
-0°C
1°C
4°C
7°C
9°C
10°C
12°C
12°C
13°C
14°C
14°C
14°C
14°C
12°C
10°C
8°C
6°C
5°C
4°C
Day Statistics
Maximum Wind
29 km/h
Humidity
64%
Precipitation
3 mm
UV Index
0
Visibility
10 km
Rain Chance
87%
Snow Chance
10%
Sun & Moon
Sunrise
06:05 AM
Sunset
07:53 PM
Moonrise
05:15 PM
Moonset
04:27 AM
Moon Phase
Waxing Gibbous
Moon Illumination
87%
Patchy rain nearby
Wednesday, April 29, 2026
High
18°C
Low
2°C
Rain Chance
89%
Hourly Forecast
4°C
4°C
3°C
3°C
2°C
2°C
3°C
6°C
9°C
11°C
13°C
14°C
15°C
16°C
17°C
16°C
15°C
14°C
12°C
11°C
10°C
9°C
8°C
8°C
Day Statistics
Maximum Wind
19 km/h
Humidity
50%
Precipitation
0 mm
UV Index
2
Visibility
10 km
Rain Chance
89%
Snow Chance
0%
Sun & Moon
Sunrise
06:03 AM
Sunset
07:54 PM
Moonrise
06:18 PM
Moonset
04:48 AM
Moon Phase
Waxing Gibbous
Moon Illumination
93%
Moderate rain
Thursday, April 30, 2026
High
6°C
Low
3°C
Rain Chance
86%
Hourly Forecast
7°C
7°C
7°C
6°C
6°C
6°C
6°C
6°C
6°C
6°C
5°C
5°C
4°C
4°C
4°C
3°C
3°C
3°C
3°C
3°C
3°C
3°C
3°C
3°C
Day Statistics
Maximum Wind
12 km/h
Humidity
96%
Precipitation
8 mm
UV Index
1
Visibility
5 km
Rain Chance
86%
Snow Chance
0%
Sun & Moon
Sunrise
06:02 AM
Sunset
07:55 PM
Moonrise
07:22 PM
Moonset
05:11 AM
Moon Phase
Waxing Gibbous
Moon Illumination
97%
Weather Alerts
Red Flag Warning issued April 23 at 11:08PM MDT until April 24 at 8:00PM MDT by NWS Denver CO
* AFFECTED AREA...Fire Weather Zones 214, 215, 216, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247 and 249. * TIMING...From 11 AM to 8 PM MDT Friday. * WINDS...Southwest 10 to 20 mph with gusts around 30 mph. * RELATIVE HUMIDITY...7 to 12 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.
A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
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