Air Quality in Altadena, United States

Windy
31.7°C · 16.1% humidity
31.7°
Feels 31.7°
6
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
12 2pm
12
12
6 5pm
0
0
10 8pm
10
11
11 11pm
11
12
12 2am
12
12
12 5am
12
12
12 8am
12
12
12 11am
12
12
Station readings
17
8
4
4
CAMS model adj -42
54
54
54
54
34
34
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

38h · 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.

16.1%
Humidity
42.6 km/h
Wind SSW
1011.7 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
6
1.52 µg/m³
PM10▲
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

38h · 1 station
PM2.51.52 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (3 stations within 25 km)
1.52
Median
5.53
Average
0.27
Low
15.0
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +9.3

What is the 7-day forecast for Altadena?

05-29
31.7° 16.4°
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°
Both models agree Avg diff: 5.0°C

Where are air quality stations near Altadena?

19
Loyola Village ES (5014)
2.5 km PM2.5: 4.6 µg/m³
1
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 0.2 µg/m³ PM10: 0.2 µg/m³
4
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 25.8°C 33.0% RH PM2.5: 1.0 µg/m³ PM10: 1.0 µg/m³
25
Annandale ES (2151)
8.5 km PM2.5: 5.9 µg/m³
23
San Pascual ES (6493)
8.7 km PM2.5: 5.5 µg/m³
24
Eagle Rock ES (3507)
9.5 km PM2.5: 5.7 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: 2.8 µg/m³
24
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 5.8 µg/m³
25
Buchanan ES (2603)
10.5 km PM2.5: 6.0 µg/m³

What cities are near Altadena?

8 La Cañada Flintridge 10 South Pasadena 13 Arcadia 13 Alhambra 11 San Gabriel 15 La Crescenta-Montrose 11 Temple City 21 Monrovia 15 Rosemead 40 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 2026-05-29T00:11 UTC.