Air Quality in Castle Hill, Australia

Drizzle
12.3°C · 92.8% humidity
12.3°
Feels 12.3°
40
Good
Air quality is satisfactory. Enjoy outdoor activities.
11 stations

Nearby Monitoring Stations

AQI Forecast
24 9pm
24
25
40 12am
36
33
30 3am
28
27
26 6am
26
26
25 9am
25
25
24 12pm
24
24
24 3pm
24
24
24 6pm
24
24
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. Current PM2.5 concentration in Castle Hill is 1.9× the WHO annual guideline of 5 µg/m³.

92.8%
Humidity
8.9 km/h
Wind WNW
1027.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
40
9.7 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Castle Hill?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.59.7 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (11 stations within 25 km)
9.7
Median
7.52
Average
1.9
Low
14.5
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -3.8

What is the 7-day forecast for Castle Hill?

05-29
16.4° 10.9°
0.56 mm
05-30
16.9° 12.0°
0.13 mm
05-31
16.4° 9.3°
06-01
19.6° 10.4°
06-02
16.2° 10.0°
06-03
14.5° 9.5°
06-04
13.1° 8.8°
0.75 mm
Both models agree Avg diff: 2.7°C

Where are air quality stations near Castle Hill?

55
North Parramatta Sydney North-west
7.4 km PM2.5: 14.0 µg/m³
21
North Parramatta Sydney North-west
7.4 km PM2.5: 5.0 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
68
North Parramatta Sydney North-west
7.4 km PM2.5: 20.2 µg/m³
19
North Parramatta Sydney North-west
7.4 km PM2.5: 4.6 µg/m³
46
North Parramatta Sydney North-west
7.4 km PM2.5: 11.0 µg/m³
57
North Parramatta Sydney North-west
7.4 km PM2.5: 15.0 µg/m³
35
Prospect Sydney North-west
10.4 km PM2.5: 8.4 µg/m³
87
Prospect Sydney North-west
10.4 km PM2.5: 29.2 µg/m³

What cities are near Castle Hill?

45 Baulkham Hills 37 Cherrybrook 38 West Pennant Hills 42 Kellyville 38 Glenwood 44 Carlingford 55 Westmead 26 Seven Hills 27 Blacktown 36 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 2026-05-29T14:49 UTC.