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
Air Quality Index Trend
48h · 1 stnCastle 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▲
9.7 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Castle Hill?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.59.7 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
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
21
North Parramatta Sydney North-west
85
North Parramatta Sydney North-west
42
North Parramatta Sydney North-west
68
North Parramatta Sydney North-west
19
North Parramatta Sydney North-west
46
North Parramatta Sydney North-west
57
North Parramatta Sydney North-west
35
Prospect Sydney North-west
87
Prospect Sydney North-west
What cities are near Castle Hill?
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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.