Hourly Weather in Altadena, California, United States
∙ View on Radar5 min
1 hour
6 hours
1 day
Wind
7 mph
Light
7 mph
Light
7 mph
Light
8 mph
Light
2 mph
Calm
2 mph
Calm
3 mph
Calm
4 mph
Calm
5 mph
Calm
Humidity
87%
Extremely humid
88%
Extremely humid
87%
Extremely humid
86%
Extremely humid
69%
Humid
68%
Humid
67%
Humid
65%
Humid
67%
Humid
Visibility
8 mi
Good
9 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
10 mi
Good
Pressure
1017 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1017 hPa
Normal
1016 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1015 hPa
Normal
1016 hPa
Normal
Clouds
5%
4%
3%
2%
0%
0%
0%
0%
2%
Dew point
51°
50°
50°
49°
47°
47°
46°
45°
45°
UV Index
0
0
0
0
0
0
0
0
0
Air quality
96
Moderate
107
Unhealthy for sensitive groups
113
Unhealthy for sensitive groups
112
Unhealthy for sensitive groups
105
Unhealthy for sensitive groups
98
Moderate
90
Moderate
83
Moderate
77
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
0.96 μg/ft3
1.11 μg/ft3
1.19 μg/ft3
1.18 μg/ft3
1.11 μg/ft3
1.01 μg/ft3
0.91 μg/ft3
0.80 μg/ft3
0.72 μg/ft3
PM25
0.93 μg/ft3
1.07 μg/ft3
1.15 μg/ft3
1.13 μg/ft3
1.05 μg/ft3
0.95 μg/ft3
0.84 μg/ft3
0.74 μg/ft3
0.64 μg/ft3
NO2
41.7 ppb
42.3 ppb
42.9 ppb
43.5 ppb
39.8 ppb
36.1 ppb
32.5 ppb
30.9 ppb
29.4 ppb
SO2
4.8 ppb
4.9 ppb
4.9 ppb
5 ppb
4.5 ppb
4 ppb
3.5 ppb
3.4 ppb
3.4 ppb
CO
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.5 ppb
0.4 ppb
0.4 ppb
0.4 ppb
0.3 ppb
O3
3.5 ppb
2.1 ppb
1.6 ppb
1.7 ppb
2.7 ppb
4 ppb
5.6 ppb
6.2 ppb
6.4 ppb