Air Quality in Altadena, United States

Windy
20.7°C · 21.3% humidity
20.7°
Feels 20.7°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
68 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
13 10am
13
13
24 1pm
21
19
17 4pm
16
15
14 7pm
14
14
14 10pm
13
13
13 1am
13
13
13 4am
13
13
13 7am
13
13
Station readings
4
8
12
38
CAMS model adj -41
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

32h · 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.

21.3%
Humidity
44.3 km/h
Wind SW
1013.9 hPa
Pressure
29.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
24
5.72 µg/m³
PM10▲
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

32h · 1 station
PM2.55.72 µg/m³ ✓ WHO
Good
PM1066.15 µg/m³
Moderate
UV INDEX29.9
Extreme
AD 300×250
Station readings (68 stations within 25 km)
5.72
Median
6.81
Average
0.88
Low
9.93
High
PM2.5 µg/m³ · Model: 20.3 · Bias: +14.6

What is the 7-day forecast for Altadena?

05-30
20.7° 12.0°
05-31
29.4° 17.7°
06-01
31.4° 13.9°
06-02
30.2° 12.5°
06-03
29.9° 10.7°
06-04
25.3° 14.7°
06-05
28.3° 14.2°
Both models agree Avg diff: 4.0°C

Where are air quality stations near Altadena?

28
Loyola Village ES (5014)
2.5 km PM2.5: 6.8 µg/m³
10
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 2.3 µg/m³ PM10: 2.7 µg/m³
38
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 34.3°C 28.0% RH PM2.5: 9.0 µg/m³ PM10: 10.0 µg/m³
23
Annandale ES (2151)
8.5 km PM2.5: 5.5 µg/m³
24
San Pascual ES (6493)
8.7 km PM2.5: 5.8 µg/m³
22
Eagle Rock ES (3507)
9.5 km PM2.5: 5.3 µg/m³
23
Eagle Rock Public Library - Outside
9.6 km PM2.5: 5.4 µg/m³
12
Eagle Rock Public Library - Inside
9.9 km PM2.5: 2.9 µg/m³
20
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 4.8 µg/m³
26
Buchanan ES (2603)
10.5 km PM2.5: 6.2 µg/m³

What cities are near Altadena?

25 La Cañada Flintridge 26 South Pasadena 27 Arcadia 28 Alhambra 28 San Gabriel 25 La Crescenta-Montrose 28 Temple City 27 Monrovia 30 Rosemead 25 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 2026-05-30T20:29 UTC.