What is the air quality in Altadena today?

The current Air Quality Index (AQI) in Altadena is 33 (Good). PM2.5 concentration is 7.89 µg/m³.

What is the temperature in Altadena right now?

The current temperature in Altadena is 31.4°C (feels like 31.4°C). Humidity is 8.7% and wind speed is 30.9 km/h.

Is it safe to go outside in Altadena?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Altadena, United States

Clear

31.4°C · 8.7% humidity

31.4°

Feels 31.4°

Good

Air quality is satisfactory. Enjoy outdoor activities.

69 stations

Nearby Monitoring Stations

AQI Forecast

25 10am

33 1pm

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Station readings

Air Quality Index Trend

47h · 2 stn

View full history →

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.

8.7%

Humidity

30.9 km/h

Wind SW

1017.0 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

7.89 µg/m³

PM10▲

54.9 µg/m³

050100150200300500

What is the weather forecast for Altadena?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations

PM2.57.89 µg/m³ ✓ WHO

Good

PM1054.9 µg/m³

Moderate

UV INDEX0.0

Low

Station readings (69 stations within 25 km)

7.89

Median

9.12

Average

1.13

Low

13.86

High

PM2.5 µg/m³ · Model: 19.2 · Bias: +11.3

What is the 7-day forecast for Altadena?

10-20

31.4° 20.3°

10-21

25.7° 16.5°

10-22

31.1° 18.7°

10-23

23.3° 17.8°

10-24

24.8° 15.5°

0.38 mm

10-25

26.6° 11.4°

0.13 mm

10-26

26.7° 17.1°

0.62 mm

Both models agree Avg diff: 7.7°C

Where are air quality stations near Altadena?

RBAC Rose Bowl Aquatics Center

5.2 km 25.5% RH PM2.5: 0.7 µg/m³ PM10: 1.0 µg/m³

united-states-of-america-san-marino-sierra-madre-boulevard

6.6 km 33.9°C 32.0% RH PM2.5: 5.0 µg/m³ PM10: 5.0 µg/m³

Annandale ES (2151)

8.5 km PM2.5: 8.5 µg/m³

San Pascual ES (6493)

8.7 km PM2.5: 7.7 µg/m³

Eagle Rock ES (3507)

9.5 km PM2.5: 8.0 µg/m³

Eagle Rock Public Library - Outside

9.6 km PM2.5: 8.5 µg/m³

Eagle Rock Public Library - Inside

9.9 km PM2.5: 4.1 µg/m³

Clear Creek Ed Ctr (1481)

10.4 km PM2.5: 6.1 µg/m³

Buchanan ES (2603)

10.5 km PM2.5: 8.1 µg/m³

Sierra Vista ES (6767)

10.7 km PM2.5: 9.6 µg/m³

What cities are near Altadena?

35 La Cañada Flintridge 35 South Pasadena 35 Arcadia 37 Alhambra 36 San Gabriel 37 La Crescenta-Montrose 35 Temple City 36 Monrovia 36 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 2026-10-20T20:55 UTC.