Air Quality in Altadena, United States

Partly Cloudy
27.8°C · 52.4% humidity
27.8°
Feels 30.3°
35
Good
Air quality is satisfactory. Enjoy outdoor activities.
67 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
18 6am
16
10
35 9am
22
16
11 12pm
8
6
4 3pm
3
2
2 6pm
1
1
1 9pm
0
4
4 12am
4
4
4 3am
4
4
Station readings
18
16
10
CAMS model adj -62
83
66
66
66
54
54
54
54
54
54
54
54
54
54
54
54
54
66
66
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.

52.4%
Humidity
39.2 km/h
Wind SW
1017.0 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
35
8.42 µg/m³
PM10▲
44
48.05 µg/m³
050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.58.42 µg/m³ ✓ WHO
Good
PM1048.05 µg/m³
Good
UV INDEX6.9
High
AD 300×250
Station readings (67 stations within 25 km)
8.42
Median
9.84
Average
0.35
Low
14.78
High
PM2.5 µg/m³ · Model: 19.2 · Bias: +10.8
Both models agree Avg diff: 4.9°C

Where are air quality stations near Altadena?

3
RBAC Rose Bowl Aquatics Center
5.2 km 59.0% RH PM2.5: 0.7 µg/m³ PM10: 0.8 µg/m³
21
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 31.2°C 35.0% RH PM2.5: 5.0 µg/m³ PM10: 6.0 µg/m³
35
Annandale ES (2151)
8.5 km PM2.5: 8.3 µg/m³
30
San Pascual ES (6493)
8.7 km PM2.5: 7.1 µg/m³
39
Eagle Rock ES (3507)
9.5 km PM2.5: 9.3 µg/m³
40
Eagle Rock Public Library - Outside
9.6 km PM2.5: 9.7 µg/m³
20
Eagle Rock Public Library - Inside
9.9 km PM2.5: 4.7 µg/m³
16
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 3.9 µg/m³
41
Buchanan ES (2603)
10.5 km PM2.5: 9.9 µg/m³
42
Sierra Vista ES (6767)
10.7 km PM2.5: 10.1 µg/m³

What cities are near Altadena?

37 La Cañada Flintridge 38 South Pasadena 38 Arcadia 41 Alhambra 40 San Gabriel 35 La Crescenta-Montrose 40 Temple City 38 Monrovia 41 Rosemead 43 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 2026-09-05T16:29 UTC.