Air Quality in Hornsby, Australia

Drizzle
15.8°C · 80.1% humidity
15.8°
Feels 15.8°
42
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast
54 4pm
54
54
42 7pm
40
38
37 10pm
36
36
28 1am
28
28
27 4am
27
27
27 7am
34
34
54 10am
54
54
54 1pm
54
54

Air Quality Index Trend

46h · 4 stn

Hornsby'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.

80.1%
Humidity
46.8 km/h
Wind SSE
1021.5 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
42
10.15 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Hornsby?

Temperature & Precipitation

PM2.5 Trend

46h · 4 stations
PM2.510.15 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
Station readings (3 stations within 25 km)
10.15
Median
9.71
Average
6.12
Low
15.27
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -3.0

What is the 7-day forecast for Hornsby?

09-23
33.9° 14.6°
0.25 mm
09-24
26.6° 7.0°
0.06 mm
09-25
32.8° 9.3°
09-26
17.4° 10.7°
0.25 mm
09-27
28.3° 9.5°
0.06 mm
09-28
25.4° 11.6°
8.25 mm
09-29
26.7° 8.6°
0.19 mm
Both models agree Avg diff: 6.1°C

Where are air quality stations near Hornsby?

55
Macquarie Park Sydney East
7.8 km PM2.5: 14.0 µg/m³
56
Macquarie Park Sydney East
7.8 km PM2.5: 14.5 µg/m³
30
Macquarie Park Sydney East
7.8 km PM2.5: 7.2 µg/m³
28
Macquarie Park Sydney East
7.8 km PM2.5: 6.7 µg/m³
28
Macquarie Park Sydney East
7.8 km PM2.5: 6.7 µg/m³
51
Macquarie Park Sydney East
7.8 km PM2.5: 12.1 µg/m³
53
Macquarie Park Sydney East
7.8 km PM2.5: 13.1 µg/m³
36
North Parramatta Sydney North-west
14.3 km PM2.5: 8.6 µg/m³
33
North Parramatta Sydney North-west
14.3 km PM2.5: 7.9 µg/m³
17
North Parramatta Sydney North-west
14.3 km PM2.5: 4.1 µg/m³

What cities are near Hornsby?

42 Wahroonga 42 Cherrybrook 42 Saint Ives 42 West Pennant Hills 40 Epping 48 Castle Hill 39 Carlingford 40 Eastwood 42 Baulkham Hills 40 Ryde
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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 2026-09-23T09:28 UTC.