Air Quality in Castle Hill, Australia

Drizzle
17.0°C · 70.9% humidity
17.0°
Feels 17.0°
48
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast
54 4pm
54
54
48 7pm
30
31
32 10pm
52
53
53 1am
53
54
54 4am
54
54
54 7am
54
54
34 10am
34
34
34 1pm
54
54

Air Quality Index Trend

46h · 4 stn

Castle Hill's air quality is generally good but can be impacted by bushfire smoke, dust storms, and vehicle emissions. Seasonal fire events can cause significant temporary air quality deterioration.

70.9%
Humidity
69.4 km/h
Wind SSE
1021.3 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
48
11.43 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Castle Hill?

Temperature & Precipitation

PM2.5 Trend

46h · 4 stations
PM2.511.43 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
Station readings (2 stations within 25 km)
11.43
Median
11.51
Average
7.74
Low
15.27
High
PM2.5 µg/m³ · Model: 9.75 · Bias: -1.7

What is the 7-day forecast for Castle Hill?

09-23
28.7° 16.3°
0.13 mm
09-24
24.3° 9.9°
09-25
32.4° 12.1°
09-26
19.5° 12.1°
0.56 mm
09-27
27.1° 12.7°
09-28
23.7° 12.6°
6.37 mm
09-29
23.4° 9.4°
0.13 mm
Both models agree Avg diff: 5.3°C

Where are air quality stations near Castle Hill?

37
North Parramatta Sydney North-west
7.4 km PM2.5: 8.9 µg/m³
50
North Parramatta Sydney North-west
7.4 km PM2.5: 12.0 µg/m³
50
North Parramatta Sydney North-west
7.4 km PM2.5: 12.0 µg/m³
17
North Parramatta Sydney North-west
7.4 km PM2.5: 4.1 µg/m³
50
North Parramatta Sydney North-west
7.4 km PM2.5: 12.0 µg/m³
36
North Parramatta Sydney North-west
7.4 km PM2.5: 8.6 µg/m³
33
North Parramatta Sydney North-west
7.4 km PM2.5: 7.9 µg/m³
23
North Parramatta Sydney North-west
7.4 km PM2.5: 5.5 µg/m³
26
Prospect Sydney North-west
10.4 km PM2.5: 6.2 µg/m³
26
Prospect Sydney North-west
10.4 km PM2.5: 6.2 µg/m³

What cities are near Castle Hill?

42 Baulkham Hills 42 Cherrybrook 42 West Pennant Hills 41 Kellyville 41 Glenwood 39 Carlingford 37 Westmead 41 Seven Hills 41 Blacktown 40 Epping
Get AQI alerts for Castle Hill

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 2026-09-23T09:28 UTC.