Air Quality in Castle Hill, Australia

Partly Cloudy
14.1°C · 51.9% humidity
14.1°
Feels 14.1°
62
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast
54 6am
54
54
62 9am
40
31
30 12pm
29
29
28 3pm
28
35
54 6pm
54
54
54 9pm
54
54
54 12am
54
54
54 3am
54
54
AD 728×90

Air Quality Index Trend

49h · 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. Current PM2.5 concentration in Castle Hill is 1.1× the WHO 24-hour guideline of 15 µg/m³.

51.9%
Humidity
38.0 km/h
Wind W
1016.9 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
62
17.1 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Castle Hill?

Temperature & Precipitation

PM2.5 Trend

49h · 1 station
PM2.517.1 µg/m³ ×1.1 WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (3 stations within 25 km)
17.1
Median
17.31
Average
13.5
Low
19.47
High
PM2.5 µg/m³ · Model: 13.5 · Bias: -3.6

What is the 7-day forecast for Castle Hill?

06-08
13.0° 7.9°
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
Both models agree Avg diff: 2.6°C

Where are air quality stations near Castle Hill?

53
North Parramatta Sydney North-west
7.4 km PM2.5: 13.1 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
25
Prospect Sydney North-west
10.4 km PM2.5: 6.0 µg/m³
53
Prospect Sydney North-west
10.4 km PM2.5: 13.1 µg/m³

What cities are near Castle Hill?

60 Baulkham Hills 60 Cherrybrook 60 West Pennant Hills 54 Kellyville 54 Glenwood 63 Carlingford 64 Westmead 54 Seven Hills 54 Blacktown 62 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 2026-06-08T23:23 UTC.