Air Quality in Altadena, United States

Rain
17.0°C · 50.6% humidity
17.0°
Feels 17.0°
54
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
67 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
52 7pm
52
37
50 10pm
50
50
50 1am
50
50
50 4am
50
50
50 7am
50
50
50 10am
50
50
50 1pm
50
50
25 4pm
25
25
Station readings
52
52
37
CAMS model adj -25
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
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
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.513.46 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (67 stations within 25 km)
13.46
Median
13.18
Average
1.28
Low
18.99
High
PM2.5 µg/m³ · Model: 36.9 · Bias: +23.4

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?

54
Palms ES
2.5 km PM2.5: 13.5 µg/m³
54
Loyola Village ES (5014)
2.5 km PM2.5: 13.4 µg/m³
6
RBAC Rose Bowl Aquatics Center
5.2 km PM2.5: 1.5 µg/m³ PM10: 1.9 µg/m³
50
united-states-of-america-san-marino-sierra-madre-boulevard
6.6 km 32.0°C 37.0% RH PM2.5: 12.0 µg/m³ PM10: 13.0 µg/m³
50
Annandale ES (2151)
8.5 km PM2.5: 12.0 µg/m³
48
San Pascual ES (6493)
8.7 km PM2.5: 11.6 µg/m³
51
Eagle Rock ES (3507)
9.5 km PM2.5: 12.3 µg/m³
51
Eagle Rock Public Library - Outside
9.6 km PM2.5: 12.3 µg/m³
40
Clear Creek Ed Ctr (1481)
10.4 km PM2.5: 9.6 µg/m³
53
Buchanan ES (2603)
10.5 km PM2.5: 13.1 µg/m³

What cities are near Altadena?

54 La Cañada Flintridge 53 South Pasadena 54 Arcadia 52 Alhambra 52 San Gabriel 54 La Crescenta-Montrose 52 Temple City 53 Monrovia 52 Rosemead 54 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 2026-04-09T22:13 UTC.