Air Quality in Castle Hill, Australia

Partly Cloudy
14.1°C · 51.9% humidity
14.1°
Feels 14.1°
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
11 stations

Nearby Monitoring Stations

AQI Forecast
54 7am
54
54
55 10am
42
38
35 1pm
33
31
30 4pm
36
55
55 7pm
55
55
54 10pm
54
54
54 1am
54
54
54 4am
54
54
AD 728×90

Air Quality Index Trend

48h · 1 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.

51.9%
Humidity
38.0 km/h
Wind W
1016.9 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
55
13.76 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Castle Hill?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.513.76 µg/m³ ✓ WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (11 stations within 25 km)
13.76
Median
16.8
Average
8.2
Low
22.79
High
PM2.5 µg/m³ · Model: 10.85 · Bias: -2.9

What is the 7-day forecast for Castle Hill?

06-09
16.2° 9.2°
1.63 mm
06-10
17.3° 12.3°
0.62 mm
06-11
16.5° 7.0°
1.37 mm
06-12
16.4° 11.2°
06-13
16.7° 11.0°
06-14
18.8° 15.7°
48.13 mm
06-15
18.9° 10.9°
0.06 mm
Both models agree Avg diff: 2.6°C

Where are air quality stations near Castle Hill?

14
North Parramatta Sydney North-west
7.4 km PM2.5: 3.4 µg/m³
65
North Parramatta Sydney North-west
7.4 km PM2.5: 18.8 µg/m³
85
North Parramatta Sydney North-west
7.4 km PM2.5: 28.3 µg/m³
42
North Parramatta Sydney North-west
7.4 km PM2.5: 10.1 µg/m³
36
North Parramatta Sydney North-west
7.4 km PM2.5: 8.6 µg/m³
10
North Parramatta Sydney North-west
7.4 km PM2.5: 2.4 µg/m³
46
North Parramatta Sydney North-west
7.4 km PM2.5: 11.0 µg/m³
87
North Parramatta Sydney North-west
7.4 km PM2.5: 29.2 µg/m³
23
Prospect Sydney North-west
10.4 km PM2.5: 5.5 µg/m³
63
Prospect Sydney North-west
10.4 km PM2.5: 17.8 µg/m³

What cities are near Castle Hill?

50 Baulkham Hills 56 Cherrybrook 55 West Pennant Hills 58 Kellyville 56 Glenwood 53 Carlingford 36 Westmead 53 Seven Hills 53 Blacktown 56 Epping
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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 2026-06-09T00:59 UTC.