Air Quality in Hornsby, Australia

Rain
8.7°C · 85.2% humidity
8.7°
Feels 5.3°
57
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast
54 12pm
54
54
57 3pm
50
46
42 6pm
33
31
28 9pm
27
27
26 12am
26
26
27 3am
27
34
34 6am
54
54
54 9am
54
54
AD 728×90

Air Quality Index Trend

42h · 9 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. Current PM2.5 concentration in Hornsby is 1.0× the WHO 24-hour guideline of 15 µg/m³.

85.2%
Humidity
25.6 km/h
Wind S
1031.3 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
57
15.09 µg/m³
PM10
51
54.9 µg/m³
050100150200300500

What is the weather forecast for Hornsby?

Temperature & Precipitation

PM2.5 Trend

42h · 9 stations
PM2.515.09 µg/m³ ✓ WHO
Moderate
PM1054.9 µg/m³
Moderate
UV INDEX1.4
Low
AD 300×250
Station readings (2 stations within 25 km)
15.09
Median
15.03
Average
14.76
Low
15.29
High
PM2.5 µg/m³ · Model: 27.1 · Bias: +12.0

What is the 7-day forecast for Hornsby?

08-03
14.0° 7.3°
7.37 mm
08-04
17.3° 7.8°
0.19 mm
08-05
15.9° 8.2°
0.56 mm
08-06
17.6° 5.9°
08-07
17.1° 10.7°
0.19 mm
08-08
15.1° 6.5°
1.94 mm
08-09
15.2° 7.7°
0.19 mm
Both models agree Avg diff: 2.1°C

Where are air quality stations near Hornsby?

19
Macquarie Park Sydney East
7.8 km PM2.5: 4.6 µg/m³
28
Macquarie Park Sydney East
7.8 km PM2.5: 6.7 µg/m³
32
Macquarie Park Sydney East
7.8 km PM2.5: 7.7 µg/m³
39
Macquarie Park Sydney East
7.8 km PM2.5: 9.4 µg/m³
30
Macquarie Park Sydney East
7.8 km PM2.5: 7.2 µg/m³
30
Macquarie Park Sydney East
7.8 km PM2.5: 7.2 µg/m³
27
Macquarie Park Sydney East
7.8 km PM2.5: 6.5 µg/m³
27
Macquarie Park Sydney East
7.8 km PM2.5: 6.5 µg/m³
32
Macquarie Park Sydney East
7.8 km PM2.5: 7.7 µg/m³
28
Macquarie Park Sydney East
7.8 km PM2.5: 6.7 µg/m³

What cities are near Hornsby?

57 Wahroonga 57 Cherrybrook 57 Saint Ives 57 West Pennant Hills 53 Epping 58 Castle Hill 52 Carlingford 53 Eastwood 57 Baulkham Hills 54 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 2026-08-08T05:08 UTC.