Hourly Weather in Boulder, Colorado, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
8 mph
Light
9 mph
Light
10 mph
Breezy
12 mph
Breezy
15 mph
Breezy
16 mph
Breezy
18 mph
Breezy
18 mph
Breezy
18 mph
Breezy
Humidity
44%
Dry
38%
Dry
33%
Dry
28%
Very dry
25%
Very dry
22%
Very dry
20%
Extremely dry
19%
Extremely dry
18%
Extremely dry
Visibility
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
Pressure
1011 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1008 hPa
Low
1007 hPa
Low
1005 hPa
Low
1004 hPa
Very low
1002 hPa
Very low
Clouds
0%
0%
0%
0%
0%
0%
5%
0%
17%
Dew point
23°
25°
26°
27°
27°
27°
26°
27°
26°
UV Index
0
1
3
5
6
7
6
6
4
Air quality
56
Moderate
56
Moderate
54
Moderate
52
Moderate
50
Moderate
63
Moderate
73
Moderate
81
Moderate
82
Moderate
Pollen index
Tree
3 / 5
2 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
2 / 5
2 / 5
Weed
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Grass
1 / 5
0 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
1 / 5
Pollutants
Low risk
High risk
PM10
0.55 μg/ft3
0.82 μg/ft3
0.75 μg/ft3
0.78 μg/ft3
0.89 μg/ft3
0.95 μg/ft3
1.37 μg/ft3
1.95 μg/ft3
2.08 μg/ft3
PM25
0.38 μg/ft3
0.40 μg/ft3
0.37 μg/ft3
0.32 μg/ft3
0.30 μg/ft3
0.29 μg/ft3
0.27 μg/ft3
0.29 μg/ft3
0.29 μg/ft3
NO2
5.88 ppb
4.54 ppb
3.49 ppb
2.44 ppb
1.39 ppb
1.07 ppb
0.75 ppb
0.43 ppb
0.51 ppb
SO2
0.46 ppb
0.46 ppb
0.47 ppb
0.49 ppb
0.51 ppb
0.45 ppb
0.39 ppb
0.32 ppb
0.29 ppb
CO
0.18 ppb
0.18 ppb
0.16 ppb
0.15 ppb
0.13 ppb
0.13 ppb
0.13 ppb
0.12 ppb
0.12 ppb
O3
33.43 ppb
36.42 ppb
44.6 ppb
52.77 ppb
60.95 ppb
62.73 ppb
64.51 ppb
66.3 ppb
65.34 ppb