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EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, SEPTEMBER 2019


EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
SEPTEMBER 2019 (Table 1)

This table lists summary of meteorological observations in Hong Kong for September, 2019

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 1006.5 31.0 28.2 26.2 24.7 82 85 8.5
2 1007.0 28.1 26.9 25.2 25.2 90 88 38.4
3 1005.6 30.9 28.4 26.2 24.6 80 85 12.9
4 1004.0 28.3 26.8 25.5 25.1 91 89 62.2
5 1003.1 29.3 27.2 25.4 25.1 88 89 31.8
6 1002.5 32.4 28.9 26.8 24.9 79 55 0.2
7 1003.6 33.3 29.8 27.5 25.6 79 25 0.4
8 1004.7 33.0 30.0 28.0 26.2 80 31 0.4
9 1005.8 33.3 30.0 28.3 25.7 78 47 -
10 1008.9 33.3 30.1 28.2 25.2 76 27 -
11 1011.3 33.3 30.2 28.4 24.6 73 38 Trace
12 1009.9 33.5 30.3 28.3 24.8 73 44 -
13 1008.4 33.0 30.1 28.7 25.6 77 64 Trace
14 1008.4 32.3 29.8 28.4 25.5 78 69 Trace
15 1008.2 32.2 29.2 25.9 24.4 76 51 11.0
16 1007.7 32.3 29.3 26.3 24.5 76 73 4.3
17 1009.0 31.8 29.2 27.9 24.5 76 80 2.1
18 1010.9 32.0 28.8 25.8 24.7 79 79 18.0
19 1011.3 32.4 28.0 24.9 22.7 74 54 8.7
20 1008.7 32.6 29.0 26.2 17.5 52 9 -
21 1008.0 32.5 29.2 26.5 14.8 42 2 -
22 1012.2 31.3 28.3 25.9 13.1 40 7 -
23 1016.2 30.7 27.7 25.4 18.4 57 41 -
24 1017.5 30.3 27.5 26.3 21.5 70 59 -
25 1017.3 30.8 27.3 25.7 21.4 71 32 Trace
26 1017.2 30.8 27.5 25.5 21.6 71 43 -
27 1016.6 30.6 27.6 25.7 21.9 72 46 Trace
28 1015.0 32.2 28.2 25.9 22.2 71 33 -
29 1012.8 31.7 28.7 26.6 23.7 75 33 -
30 1008.8 33.4 30.1 27.2 22.0 64 21 -
Mean/Total 1009.6 31.8 28.7 26.6 23.1 73 50 198.9
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 2019 (Table 2)

This table lists summary of meteorological observations in Hong Kong for September, 2019

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 4.7 15.74 4.5 060 44.1
2 0 0.1 4.89 1.9 070 47.4
3 0 5.9 17.56 1.9 050 39.3
4 0 1.4 11.07 2.9 080 34.7
5 0 4.1 13.47 2.1 090 25.4
6 0 9.5 24.17 4.7 050 20.3
7 0 8.2 19.46 3.5 010 7.2
8 0 9.0 17.54 4.0 210 9.0
9 0 4.1 11.38 2.8 140 7.8
10 0 10.5 24.46 5.4 090 13.1
11 0 10.0 24.19 5.6 090 8.2
12 0 9.8 21.83 5.3 050 11.8
13 0 6.1 18.52 4.4 080 13.2
14 0 4.8 13.70 3.9 100 7.5
15 0 5.5 15.13 3.3 080 9.8
16 0 7.4 21.08 5.3 090 14.5
17 2 4.8 15.92 3.8 090 27.4
18 0 5.2 14.43 5.2 080 22.8
19 0 10.3 22.84 5.5 130 16.9
20 0 11.0 24.19 8.4 350 16.9
21 0 11.1 23.98 7.9 360 31.1
22 0 11.2 24.50 6.8 360 40.3
23 0 8.0 19.27 4.1 360 28.4
24 0 7.0 18.10 4.5 060 21.0
25 0 5.9 13.24 2.8 090 16.9
26 0 7.6 18.23 3.7 080 17.7
27 3 5.7 13.39 2.8 080 16.3
28 4 8.6 18.39 3.7 080 12.0
29 10 8.8 17.73 3.7 150 9.5
30 11 10.0 20.19 5.5 250 13.1
Mean/Total 30 216.3 17.95 129.9 080 20.1
Normal* 75.2§ 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 1000.6 hectopascals at 1610 HKT on 6 September.

The maximum air temperature recorded at the Hong Kong Observatory was 33.5 degrees C at 1302 HKT on 12 September.

The minimum air temperature recorded at the Hong Kong Observatory was 24.9 degrees C at 0426 HKT on 19 September.

The maximum gust peak speed recorded at Waglan Island was 96 kilometres per hour from 080 degrees at 0429 HKT on 2 September.

The maximum 1-minute mean rainfall rate recorded at the Hong Kong Observatory was 127 millimetres per hour at 2347 HKT on 3 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 Climatological Normal, unless otherwise specified

§ 1997-2018 Mean value