Air Quality in Castle Hill, Australia

Drizzle
10.4°C · 73.8% humidity
10.4°
Feels 10.4°
58
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast
54 12pm
34
34
58 3pm
51
66
63 6pm
60
59
57 9pm
56
56
55 12am
55
55
54 3am
54
54
54 6am
54
54
54 9am
54
54
AD 728×90

Air Quality Index Trend

42h · 9 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 1.0× the WHO 24-hour guideline of 15 µg/m³.

73.8%
Humidity
60.5 km/h
Wind SE
1031.4 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
58
15.29 µg/m³
PM10
44
48.05 µg/m³
050100150200300500

What is the weather forecast for Castle Hill?

Temperature & Precipitation

PM2.5 Trend

42h · 9 stations
PM2.515.29 µg/m³ ✓ WHO
Moderate
PM1048.05 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
Station readings (1 station within 25 km)
15.29
Median
15.29
Average
15.29
Low
15.29
High
PM2.5 µg/m³ · Model: 27.1 · Bias: +11.8

What is the 7-day forecast for Castle Hill?

08-03
15.1° 9.9°
5.19 mm
08-04
17.5° 10.2°
0.19 mm
08-05
15.6° 9.3°
0.13 mm
08-06
17.6° 8.7°
08-07
17.7° 11.4°
1.06 mm
08-08
15.0° 8.4°
3.37 mm
08-09
14.0° 9.7°
0.38 mm
Both models agree Avg diff: 1.9°C

Where are air quality stations near Castle Hill?

53
North Parramatta Sydney North-west
7.4 km PM2.5: 13.1 µg/m³
57
North Parramatta Sydney North-west
7.4 km PM2.5: 15.0 µg/m³
21
North Parramatta Sydney North-west
7.4 km PM2.5: 5.0 µg/m³
25
North Parramatta Sydney North-west
7.4 km PM2.5: 6.0 µg/m³
55
North Parramatta Sydney North-west
7.4 km PM2.5: 14.0 µg/m³
46
North Parramatta Sydney North-west
7.4 km PM2.5: 11.0 µg/m³
55
North Parramatta Sydney North-west
7.4 km PM2.5: 14.0 µg/m³
62
North Parramatta Sydney North-west
7.4 km PM2.5: 17.3 µg/m³
57
North Parramatta Sydney North-west
7.4 km PM2.5: 15.0 µg/m³
25
North Parramatta Sydney North-west
7.4 km PM2.5: 6.0 µg/m³

What cities are near Castle Hill?

57 Baulkham Hills 57 Cherrybrook 57 West Pennant Hills 83 Kellyville 83 Glenwood 52 Carlingford 48 Westmead 83 Seven Hills 83 Blacktown 53 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 2026-08-08T05:08 UTC.