Air Quality in Altadena, United States

Windy
30.9°C · 28.1% humidity
30.9°
Feels 30.9°
21
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
10 2pm
21
24
21 5pm
21
21
21 8pm
21
21
9 11pm
9
9
9 2am
9
9
21 5am
21
21
9 8am
21
21
21 11am
21
21
Station readings
10
21
24
CAMS model adj -45
66
66
66
66
66
66
66
66
66
54
54
54
54
54
54
66
66
66
54
66
66
66
66
66
AD 728×90

Air Quality Index Trend

47h · 2 stn

Altadena's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

28.1%
Humidity
40.1 km/h
Wind SSW
1010.9 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
21
5.08 µg/m³
PM10▲
60
73.05 µg/m³
050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.55.08 µg/m³ ✓ WHO
Good
PM1073.05 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250
Station readings (2 stations within 25 km)
5.08
Median
6.03
Average
2.06
Low
10.0
High
PM2.5 µg/m³ · Model: 36.45 · Bias: +31.4

What is the 7-day forecast for Altadena?

08-03
34.6° 20.7°
08-04
30.7° 23.0°
08-05
34.0° 21.8°
08-06
34.9° 18.0°
08-07
30.6° 20.7°
08-08
31.0° 18.0°
08-09
31.1° 16.5°
Both models agree Avg diff: 3.2°C

Where are air quality stations near Altadena?

16
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 3.8 µg/m³ PM10: 3.9 µg/m³
38
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 40.6°C 24.0% RH PM2.5: 9.0 µg/m³ PM10: 10.0 µg/m³
49
Annandale ES (2151)
8.5 km PM2.5: 11.7 µg/m³
48
San Pascual ES (6493)
8.7 km PM2.5: 11.4 µg/m³
47
Eagle Rock ES (3507)
9.5 km PM2.5: 11.2 µg/m³
44
Eagle Rock Public Library - Outside
9.6 km PM2.5: 10.5 µg/m³
20
Eagle Rock Public Library - Inside
9.9 km PM2.5: 4.8 µg/m³
45
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 10.9 µg/m³
49
Buchanan ES (2603)
10.5 km PM2.5: 11.7 µg/m³
54
Sierra Vista ES (6767)
10.7 km PM2.5: 13.6 µg/m³

What cities are near Altadena?

16 La Cañada Flintridge 22 South Pasadena 35 Arcadia 30 Alhambra 34 San Gabriel 19 La Crescenta-Montrose 36 Temple City 32 Monrovia 33 Rosemead 18 Atwater Village
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T00:44 UTC.