Air Quality in Castaic, United States

Drizzle
15.1°C · 60.7% humidity
15.1°
Feels 15.1°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
4 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
53 6pm
54
30
21 9pm
9
0
0 12am
0
0
0 3am
0
9
9 6am
21
21
21 9am
21
21
34 12pm
21
21
21 3pm
21
21
Station readings
53
54
30
CAMS model adj -16
75
50
50
37
25
12
12
12
12
12
12
25
25
37
37
37
37
37
50
37
37
37
37
37
AD 728×90

PM2.5 Trend (24h)

32h · 3 stations
60.7%
Humidity
66.3 km/h
Wind SW
1010.4 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Castaic?

Temperature & Precipitation

PM2.513.19 µg/m³ ✓ WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (4 stations within 25 km)
13.19
Median
14.73
Average
12.93
Low
19.59
High
PM2.5 µg/m³ · Model: 14.65 · Bias: +1.5

What is the 7-day forecast for Castaic?

04-09
22.0° 11.8°
0.13 mm
04-10
15.1° 10.8°
6.5 mm
04-11
14.8° 8.3°
17.37 mm
04-12
12.9° 7.3°
0.5 mm
04-13
13.1° 5.8°
0.13 mm
04-14
19.1° 7.7°
04-15
22.1° 12.4°
Both models agree Avg diff: 2.5°C

Where are air quality stations near Castaic?

61
Santa Clarita-Placerita, Los Angeles
14.6 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
46
Castlebay Ln ES (2881)
22.8 km PM2.5: 11.1 µg/m³
50
Van Gogh ES (7422)
23.1 km PM2.5: 11.9 µg/m³
61
Herrick Ave ES (4515)
24.2 km PM2.5: 17.0 µg/m³
38
DA GOAT
25.4 km 25.7°C 53.0% RH PM2.5: 9.0 µg/m³
50
Rinaldi Adult Center (9365)
25.4 km PM2.5: 11.9 µg/m³
28
Sylmar Public Library - Inside
25.5 km PM2.5: 6.8 µg/m³
52
Knollwood ES (4762)
25.6 km PM2.5: 12.8 µg/m³

What cities are near Castaic?

55 Valencia 54 Stevenson Ranch 54 Santa Clarita 55 Canyon Country 53 Sylmar 54 Chatsworth 53 Simi Valley 53 San Fernando 20 Fillmore 54 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 2026-04-09T21:04 UTC.