Hourly Weather in Altadena, California, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
13 km/h
Light
15 km/h
Light
15 km/h
Light
13 km/h
Light
12 km/h
Light
9 km/h
Light
6 km/h
Calm
2 km/h
Calm
5 km/h
Calm
Humidity
41%
Dry
39%
Dry
38%
Dry
46%
Comfortable
47%
Comfortable
47%
Comfortable
47%
Comfortable
41%
Dry
40%
Dry
Visibility
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
16 km
Good
Pressure
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1010 hPa
Normal
1011 hPa
Normal
Clouds
0%
0%
0%
0%
0%
0%
0%
0%
0%
Dew point
13°
13°
12°
15°
15°
14°
14°
12°
12°
UV Index
11
10
8
5
3
1
0
0
0
Air quality
63
Moderate
64
Moderate
65
Moderate
66
Moderate
66
Moderate
65
Moderate
62
Moderate
63
Moderate
65
Moderate
Pollen index
Tree
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Weed
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Grass
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
0 / 5
Pollutants
Low risk
High risk
PM10
37.7 μg/m3
37.7 μg/m3
37.7 μg/m3
37.7 μg/m3
37.7 μg/m3
21.3 μg/m3
21.6 μg/m3
22.5 μg/m3
23 μg/m3
PM25
15.6 μg/m3
16 μg/m3
16.4 μg/m3
16.8 μg/m3
17.2 μg/m3
14.9 μg/m3
15 μg/m3
15.5 μg/m3
16.4 μg/m3
NO2
5.1 ppb
4.4 ppb
4.1 ppb
3.8 ppb
3.6 ppb
2.9 ppb
3.8 ppb
4.7 ppb
6.5 ppb
SO2
1.5 ppb
1.5 ppb
1.6 ppb
1.6 ppb
1.6 ppb
1.4 ppb
1.6 ppb
1.7 ppb
1.8 ppb
CO
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
0.1 ppb
O3
37.8 ppb
42.5 ppb
47.5 ppb
52.3 ppb
56.4 ppb
74.7 ppb
70.4 ppb
66.2 ppb
62.5 ppb