Air Quality in Castaic, United States

Drizzle
16.5°C · 65.3% humidity
16.5°
Feels 16.5°
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
55 5pm
53
23
28 8pm
15
3
0 11pm
0
0
0 2am
0
0
3 5am
3
15
15 8am
15
15
15 11am
28
15
15 2pm
15
15
Station readings
55
53
23
CAMS model adj -22
75
75
50
50
37
25
12
12
12
12
12
12
25
25
37
37
37
37
37
50
37
37
37
37
AD 728×90

PM2.5 Trend (24h)

32h · 3 stations
65.3%
Humidity
60.5 km/h
Wind SSW
1012.5 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.513.82 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (4 stations within 25 km)
13.82
Median
15.38
Average
13.8
Low
20.07
High
PM2.5 µg/m³ · Model: 14.65 · Bias: +0.8
Both models agree Avg diff: 2.5°C

Where are air quality stations near Castaic?

24
Santa Clarita-Placerita, Los Angeles
14.6 km
42
Santa Clarita-Placerita, Los Angeles
14.6 km
61
Santa Clarita-Placerita, Los Angeles
14.6 km
46
Piru - Pacific, Ventura, California
19.6 km
15
Canyon Creek OEC (1211)
20.9 km PM2.5: 3.7 µg/m³
53
Porter Ranch Cmty Sch (2303)
22.1 km PM2.5: 13.2 µg/m³
53
Castlebay Ln ES (2881)
22.8 km PM2.5: 12.9 µg/m³
53
Van Gogh ES (7422)
23.1 km PM2.5: 13.2 µg/m³
67
Herrick Ave ES (4515)
24.2 km PM2.5: 19.6 µg/m³
43
Simi Valley - Cochran Street, Ventura, California
24.3 km

What cities are near Castaic?

56 Valencia 56 Stevenson Ranch 55 Santa Clarita 57 Canyon Country 55 Sylmar 55 Chatsworth 54 Simi Valley 55 San Fernando 22 Fillmore 55 Northridge

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T20:21 UTC.