Air Quality in Ma On Shan, Hong Kong

Rain
28.1°C · 85.0% humidity
28.1°
Feels 34.8°
55
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
17 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
66 4am
65
67
55 7am
58
60
62 10am
75
76
77 1pm
77
77
77 4pm
78
66
66 7pm
78
78
78 10pm
78
78
78 1am
78
78
Station readings
66
65
67
CAMS model adj +12
54
54
54
54
54
54
54
66
66
66
66
66
66
66
54
54
66
66
66
66
66
66
66
66
AD 728×90

Air Quality Index Trend

47h · 2 stn
85.0%
Humidity
13.5 km/h
Wind NNE
999.1 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
PM2.5
55
13.87 µg/m³
PM10
44
48.05 µg/m³
050100150200300500

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.513.87 µg/m³ ✓ WHO
Moderate
PM1048.05 µg/m³
Good
UV INDEX1.4
Low
AD 300×250
13.87
Median
16.23
Average
10.1
Low
24.9
High
PM2.5 µg/m³ · Model: 16.35 · Bias: +2.5
07-21
28.3° 26.6°
10.38 mm
07-22
31.8° 26.4°
22.56 mm
07-23
34.2° 25.4°
16.37 mm
07-24
29.3° 26.5°
0.94 mm
07-25
33.2° 26.1°
0.25 mm
07-26
32.6° 25.7°
9.06 mm
07-27
30.2° 23.1°
16.88 mm
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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 2026-07-21T23:18 UTC.