Air Quality in Altadena, United States

Windy
29.8°C · 27.3% humidity
29.8°
Feels 29.8°
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
66 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
9 10am
10
12
30 1pm
24
20
17 4pm
15
14
13 7pm
12
11
11 10pm
11
11
10 1am
10
10
10 4am
10
10
10 7am
10
10
Station readings
9
10
12
CAMS model adj -44
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

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.

27.3%
Humidity
43.3 km/h
Wind SSW
1009.2 hPa
Pressure
29.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
30
7.23 µg/m³
PM10▲
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.57.23 µg/m³ ✓ WHO
Good
PM1066.15 µg/m³
Moderate
UV INDEX29.9
Extreme
AD 300×250
Station readings (66 stations within 25 km)
7.23
Median
8.53
Average
0.59
Low
11.83
High
PM2.5 µg/m³ · Model: 20.75 · Bias: +13.5

What is the 7-day forecast for Altadena?

07-21
29.8° 24.1°
07-22
32.1° 23.9°
07-23
31.9° 21.3°
1.13 mm
07-24
34.1° 23.3°
0.19 mm
07-25
31.8° 23.3°
07-26
35.5° 21.5°
07-27
34.7° 23.1°
Both models agree Avg diff: 2.5°C

Where are air quality stations near Altadena?

39
Loyola Village ES (5014)
2.5 km PM2.5: 9.4 µg/m³
2
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 0.4 µg/m³ PM10: 0.4 µg/m³
29
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 40.7°C 24.0% RH PM2.5: 7.0 µg/m³ PM10: 7.0 µg/m³
33
Annandale ES (2151)
8.5 km PM2.5: 8.0 µg/m³
32
San Pascual ES (6493)
8.7 km PM2.5: 7.7 µg/m³
34
Eagle Rock ES (3507)
9.5 km PM2.5: 8.1 µg/m³
32
Eagle Rock Public Library - Outside
9.6 km PM2.5: 7.7 µg/m³
18
Eagle Rock Public Library - Inside
9.9 km PM2.5: 4.2 µg/m³
33
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 7.9 µg/m³
34
Buchanan ES (2603)
10.5 km PM2.5: 8.2 µg/m³

What cities are near Altadena?

32 La Cañada Flintridge 33 South Pasadena 32 Arcadia 35 Alhambra 34 San Gabriel 35 La Crescenta-Montrose 33 Temple City 32 Monrovia 35 Rosemead 38 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 2026-07-21T20:42 UTC.