Air Quality in Altadena, United States

Rain
17.0°C · 50.6% humidity
17.0°
Feels 17.0°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
68 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
52 8pm
49
20
46 11pm
46
46
46 2am
46
46
46 5am
46
46
46 8am
46
46
46 11am
46
46
46 2pm
46
21
21 5pm
21
21
Station readings
52
49
20
CAMS model adj -29
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
50
50
50
50
AD 728×90

PM2.5 Trend (24h)

32h · 3 stations
50.6%
Humidity
55.0 km/h
Wind SSW
1010.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.513.13 µg/m³ ✓ WHO
Moderate
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (68 stations within 25 km)
13.13
Median
12.94
Average
1.19
Low
18.99
High
PM2.5 µg/m³ · Model: 44.15 · Bias: +31.0

What is the 7-day forecast for Altadena?

04-09
22.8° 12.7°
04-10
17.0° 11.2°
12.69 mm
04-11
13.9° 9.6°
16.19 mm
04-12
12.5° 6.4°
0.69 mm
04-13
13.8° 7.1°
0.06 mm
04-14
20.0° 10.2°
04-15
22.2° 14.9°
Both models agree Avg diff: 4.4°C

Where are air quality stations near Altadena?

50
Palms ES
2.5 km PM2.5: 12.0 µg/m³
54
Loyola Village ES (5014)
2.5 km PM2.5: 13.4 µg/m³
3
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 0.8 µg/m³ PM10: 0.9 µg/m³
42
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 30.8°C 39.0% RH PM2.5: 10.0 µg/m³ PM10: 10.0 µg/m³
51
Annandale ES (2151)
8.5 km PM2.5: 12.2 µg/m³
49
San Pascual ES (6493)
8.7 km PM2.5: 11.7 µg/m³
52
Eagle Rock ES (3507)
9.5 km PM2.5: 12.4 µg/m³
51
Eagle Rock Public Library - Outside
9.6 km PM2.5: 12.1 µg/m³
48
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 11.6 µg/m³
53
Buchanan ES (2603)
10.5 km PM2.5: 12.9 µg/m³

What cities are near Altadena?

53 La Cañada Flintridge 52 South Pasadena 52 Arcadia 52 Alhambra 52 San Gabriel 54 La Crescenta-Montrose 52 Temple City 52 Monrovia 52 Rosemead 52 Atwater Village

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T23:07 UTC.