What is the air quality in Castaic today?

The current Air Quality Index (AQI) in Castaic is 40 (Good). PM2.5 concentration is 9.54 µg/m³.

What is the temperature in Castaic right now?

The current temperature in Castaic is 27.1°C (feels like 27.1°C). Humidity is 31.8% and wind speed is 62.2 km/h.

Is it safe to go outside in Castaic?

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

Air Quality in Castaic, United States

Windy

27.1°C · 31.8% humidity

27.1°

Feels 27.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

7 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

47h · 1 stn

View full history →

Castaic's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

31.8%

Humidity

62.2 km/h

Wind SW

1011.9 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

9.54 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station

PM2.59.54 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (7 stations within 25 km)

9.54

Median

8.41

Average

5.15

Low

15.0

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -3.5

What is the 7-day forecast for Castaic?

10-21

27.1° 13.5°

10-22

29.8° 18.3°

10-23

25.9° 16.4°

10-24

26.7° 14.9°

0.5 mm

10-25

24.5° 12.0°

0.44 mm

10-26

28.1° 15.6°

1.19 mm

10-27

26.0° 14.1°

0.75 mm

Both models agree Avg diff: 5.6°C

Where are air quality stations near Castaic?

Santa Clarita-Placerita, Los Angeles

14.6 km PM2.5: 15.4 µg/m³

Santa Clarita-Placerita, Los Angeles

14.6 km PM2.5: 15.0 µg/m³

Santa Clarita-Placerita, Los Angeles

14.6 km PM2.5: 15.0 µg/m³

Piru - Pacific, Ventura, California

19.6 km PM2.5: 11.5 µg/m³

Piru - Pacific, Ventura, California

19.6 km PM2.5: 12.6 µg/m³

Piru - Pacific, Ventura, California

19.6 km PM2.5: 12.1 µg/m³

Piru - Pacific, Ventura, California

19.6 km PM2.5: 13.1 µg/m³

Canyon Creek OEC (1211)

20.9 km PM2.5: 5.2 µg/m³

Porter Ranch Cmty Sch (2303)

22.1 km PM2.5: 6.9 µg/m³

Castlebay Ln ES (2881)

22.8 km PM2.5: 5.4 µg/m³

What cities are near Castaic?

35 Valencia 38 Stevenson Ranch 52 Santa Clarita 35 Canyon Country 31 Sylmar 30 Chatsworth 33 Simi Valley 30 San Fernando 48 Fillmore 32 Northridge

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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 2026-10-21T00:31 UTC.