Air Quality in Altadena, United States

Windy
30.0°C · 23.1% humidity
30.0°
Feels 30.0°
39
Good
Air quality is satisfactory. Enjoy outdoor activities.
68 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
45 2pm
45
45
39 5pm
41
42
43 8pm
43
44
44 11pm
44
45
45 2am
45
45
45 5am
45
45
45 8am
45
45
45 11am
45
45
Station readings
42
46
50
25
CAMS model adj -9
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
54
AD 728×90

Air Quality Index Trend

48h · 1 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.

23.1%
Humidity
44.5 km/h
Wind SSW
1009.0 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
39
9.31 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.59.31 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX6.9
High
AD 300×250
Station readings (68 stations within 25 km)
9.31
Median
10.18
Average
2.22
Low
14.91
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +4.2

What is the 7-day forecast for Altadena?

06-09
30.0° 16.3°
06-10
29.6° 16.5°
06-11
27.9° 16.9°
06-12
30.0° 18.0°
0.06 mm
06-13
34.3° 19.4°
06-14
28.5° 22.0°
06-15
25.4° 12.9°
Both models agree Avg diff: 3.9°C

Where are air quality stations near Altadena?

33
Loyola Village ES (5014)
2.5 km PM2.5: 7.9 µg/m³
7
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 1.7 µg/m³ PM10: 1.9 µg/m³
25
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 30.9°C 35.0% RH PM2.5: 6.0 µg/m³ PM10: 7.0 µg/m³
45
Annandale ES (2151)
8.5 km PM2.5: 10.9 µg/m³
42
San Pascual ES (6493)
8.7 km PM2.5: 10.2 µg/m³
43
Eagle Rock ES (3507)
9.5 km PM2.5: 10.3 µg/m³
41
Eagle Rock Public Library - Outside
9.6 km PM2.5: 9.8 µg/m³
18
Eagle Rock Public Library - Inside
9.9 km PM2.5: 4.2 µg/m³
54
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 13.7 µg/m³
45
Buchanan ES (2603)
10.5 km PM2.5: 10.8 µg/m³

What cities are near Altadena?

40 La Cañada Flintridge 42 South Pasadena 42 Arcadia 42 Alhambra 42 San Gabriel 45 La Crescenta-Montrose 42 Temple City 44 Monrovia 42 Rosemead 44 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 2026-06-09T00:40 UTC.