Air Quality in Castaic, United States
Windy
20.7°C · 45.7% humidity
20.7°
Feels 20.7°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
7 stations
Nearby Monitoring Stations
AQI Forecast
Calibrated
14
1pm
14
14
20
4pm
16
15
16
7pm
16
15
15
10pm
15
21
21
1am
21
21
21
4am
21
41
21
7am
21
21
21
10am
21
21
Station readings
12
12
12
17
CAMS model
adj -13
27
27
27
27
25
25
27
27
27
27
27
34
34
34
34
34
34
54
34
34
34
34
34
34
Air Quality Index Trend
40h · 1 stnCastaic's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
45.7%
Humidity
92.0 km/h
Wind SW
1011.1 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.76 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Castaic?
Temperature & Precipitation
PM2.5 Trend
40h · 1 stationPM2.54.76 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX12.9
Extreme
Station readings (7 stations within 25 km)
4.76
Median
4.68
Average
3.71
Low
7.4
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +2.6
What is the 7-day forecast for Castaic?
05-29
32.6° 14.3°
05-30
20.7° 10.9°
05-31
29.9° 17.2°
06-01
32.6° 12.9°
06-02
29.7° 10.9°
06-03
31.0° 8.1°
06-04
25.8° 12.5°
Both models agree
Avg diff: 4.7°C
Where are air quality stations near Castaic?
18
Santa Clarita-Placerita, Los Angeles
25
Santa Clarita-Placerita, Los Angeles
34
Santa Clarita-Placerita, Los Angeles
46
Santa Clarita-Placerita, Los Angeles
5
Santa Clarita-Placerita, Los Angeles
42
Piru - Pacific, Ventura, California
17
Canyon Creek OEC (1211)
16
Porter Ranch Cmty Sch (2303)
15
Castlebay Ln ES (2881)
16
Van Gogh ES (7422)
What cities are near Castaic?
Get AQI alerts for Castaic
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T23:35 UTC.