Air Quality in Castle Hill, Australia

Drizzle
16.3°C · 46.6% humidity
16.3°
Feels 16.3°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations

Nearby Monitoring Stations

AQI Forecast
24 7am
24
24
25 10am
24
24
24 1pm
24
24
25 4pm
25
25
25 7pm
25
24
24 10pm
25
25
25 1am
25
24
24 4am
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 1.2× the WHO annual guideline of 5 µg/m³.

46.6%
Humidity
71.5 km/h
Wind W
1029.4 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
25
6.12 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
PM2.56.12 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (4 stations within 25 km)
6.12
Median
6.3
Average
4.6
Low
7.46
High
PM2.5 µg/m³ · Model: 5.8 · Bias: -0.3

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: 2.6°C

Where are air quality stations near Castle Hill?

42
North Parramatta Sydney North-west
7.4 km PM2.5: 10.1 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?

25 Baulkham Hills 26 Cherrybrook 26 West Pennant Hills 25 Kellyville 25 Glenwood 25 Carlingford 23 Westmead 23 Seven Hills 24 Blacktown 25 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 2026-05-29T00:20 UTC.