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EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
SEPTEMBER 2016 (Table 1)

Date
September
Mean Pressure
(hPa)
Air   Temperature Mean
Dew Point
Temperature
(deg. C)
Mean
Relative
Humidity
(%)
Mean
Amount
of Cloud
(%)
Total
Rainfall
(mm)
Maximum
(deg. C)
Mean
(deg. C)
Minimum
(deg. C)
1 1003.3 30.0 27.9 25.2 25.6 88 86 68.9
2 1002.0 31.0 28.7 27.5 26.1 86 88 6.1
3 1002.7 31.2 28.1 25.7 25.7 87 88 7.0
4 1005.2 30.1 28.2 27.0 25.3 84 88 Trace
5 1006.1 29.2 27.1 25.8 25.1 89 86 75.3
6 1006.7 27.7 26.7 25.7 25.0 90 86 10.8
7 1007.5 28.0 26.5 25.4 24.8 90 91 20.4
8 1008.0 28.4 27.1 25.5 25.2 90 84 2.8
9 1008.4 29.4 27.0 25.5 24.8 88 87 16.3
10 1007.8 27.7 26.3 24.5 25.1 93 87 53.2
11 1008.4 31.6 28.1 25.9 25.6 87 72 6.6
12 1010.2 32.7 28.7 26.0 25.3 83 49 -
13 1010.2 30.9 28.2 26.0 25.2 84 61 8.5
14 1004.5 32.6 29.6 26.9 23.0 69 59 -
15 1002.9 31.9 29.4 28.0 22.8 68 63 0.7
16 1004.9 31.3 29.0 27.3 22.9 70 44 -
17 1005.7 31.6 29.3 27.3 22.2 66 50 -
18 1006.9 31.5 28.6 26.3 21.7 66 47 Trace
19 1008.0 32.6 28.6 25.5 23.1 73 51 3.8
20 1012.1 29.5 25.5 22.8 23.2 87 85 39.6
21 1014.4 30.6 27.1 24.7 22.6 77 52 2.4
22 1013.6 28.9 27.2 26.1 22.7 76 87 -
23 1012.0 29.9 27.7 26.5 23.5 78 88 Trace
24 1010.5 30.5 27.9 26.6 23.8 78 66 Trace
25 1009.8 30.5 28.1 26.9 24.3 80 52 -
26 1007.7 31.1 28.5 27.0 24.8 81 69 Trace
27 1002.6 34.9 31.1 27.7 24.1 68 36 -
28 999.5 32.2 30.4 28.9 21.3 58 79 -
29 1003.9 28.9 26.5 24.9 20.5 70 88 0.7
30 1007.7 26.4 25.1 24.1 21.0 78 86 -
Mean/Total 1007.1 30.4 27.9 26.1 23.9 79 72 323.1
Normal* 1008.9 30.1 27.7 25.8 23.4 78 66 327.6
Station Hong   Kong   Observatory

EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
SEPTEMBER 2016 (Table 2)

Date
September
Number of hours
of Reduced
Visibility#
(hours)
Total
Bright
Sunshine
(hours)
Daily
Global Solar
Radiation
(MJ/m2)
Total
Evaporation
(mm)
Prevailing
Wind
Direction
(degrees)
Mean
Wind
Speed
(km/h)
1 0 2.8 11.43 0.6 230 23.5
2 0 0.5 6.83 2.3 230 19.7
3 2 1.2 9.61 6.1 230 10.9
4 2 3.1 16.03 3.4 070 28.1
5 0 0.4 4.33 N/A 050 30.0
6 0 0.7 6.22 0.9 050 7.3
7 0 - 4.00 1.4 230 16.1
8 0 0.2 7.45 1.5 230 8.8
9 0 1.1 8.04 1.5 230 11.3
10 0 0.1 3.89 N/A 050 11.0
11 0 6.4 17.95 5.4 030 7.1
12 0 10.5 24.14 4.4 030 15.2
13 0 5.0 16.50 3.2 080 18.7
14 1 9.7 21.04 6.9 340 17.3
15 0 4.5 13.34 3.5 280 15.0
16 0 7.3 17.21 4.3 010 15.3
17 0 7.3 17.04 7.3 010 19.4
18 0 5.9 14.05 3.8 010 12.7
19 0 7.5 16.66 3.8 010 21.6
20 3 3.6 12.32 2.7 350 32.0
21 0 10.4 22.81 5.5 070 35.7
22 0 3.8 13.16 4.4 070 34.9
23 0 7.3 18.11 4.1 080 30.6
24 0 7.9 19.97 3.0 080 27.6
25 0 7.1 16.37 5.9 080 20.1
26 10 7.3 16.77 3.7 230 15.0
27 9 10.2 19.59 6.8 290 11.3
28 6 0.3 8.60 4.3 300 25.5
29 0 1.1 7.40 2.9 010 18.2
30 12 2.5 10.65 N/A 010 7.5
Mean/Total 45 135.7 13.38 103.6& 080 18.9
Normal* 83.1§ 172.3 14.61 125.9 090 22.6
StationHong   Kong
International   Airport
King's   Park Waglan   Island^

The minimum pressure recorded at the Hong Kong Observatory was 997.2 hectopascals at 1535 HKT on 28 September.

The maximum air temperature recorded at the Hong Kong Observatory was 34.9 degrees C at 1542 HKT on 27 September.

The minimum air temperature recorded at the Hong Kong Observatory was 22.8 degrees C at 0719 HKT on 20 September.

The maximum gust peak speed recorded at Waglan Island was 85 kilometres per hour from 240 degrees at 1320 HKT on 2 September.

The maximum 1-minute mean rainfall rate recorded at the Hong Kong Observatory was 155 millimetres per hour at 1159 HKT on 10 September.

# Reduced visibility refers to visibility below 8 kilometres when there is no fog, mist or precipitation.

   - The visibility readings at the Hong Kong International Airport are based on hourly observations by professional meteorological observers in 2004 and before, and average readings over the 10-minute period before the clock hour of the visibility meter near the middle of the south runway from 2005 onwards. The change of the data source in 2005 is an improvement of the visibility assessment using instrumented observations following the international trend.

   - Before 10 October 2007, the number of hours of reduced visibility at the Hong Kong International Airport in 2005 and thereafter displayed in this web page was based on hourly visibility observations by professional meteorological observers. Since 10 October 2007, the data have been revised using the average visibility readings over the 10-minute period before the clock hour, as recorded by the visibility meter near the middle of the south runway.

^ In case the data are not available from Waglan Island, observations of Cheung Chau or other nearby weather stations will be incorporated in computing the Prevailing Wind Direction and Mean Wind Speed.

* 1981-2010 Climatlogical Normal, unless otherwise specified

§ 1997-2015 Mean value

& Data incomplete

Last revision date: <04 Oct 2016>