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EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, NOVEMBER 2009

EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
NOVEMBER 2009

Date
NOVEMBER
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 1015.5 30.3 26.3 24.4 19.9 69 45 -
2 1022.8 26.2 22.9 19.6 9.9 45 41 -
3 1025.8 21.2 18.5 15.8 7.0 47 52 -
4 1022.9 24.4 21.0 17.1 11.1 53 51 -
5 1019.3 27.3 23.5 21.1 16.8 67 55 -
6 1015.8 27.1 24.2 22.3 20.2 79 63 -
7 1014.2 27.6 25.0 23.8 21.1 79 82 -
8 1012.9 26.8 25.3 24.4 22.6 85 80 Trace
9 1009.6 27.3 25.6 24.4 22.9 85 78 Trace
10 1007.2 29.0 26.4 24.9 22.1 78 29 Trace
11 1009.2 28.8 26.2 24.7 22.4 80 74 Trace
12 1012.6 27.8 25.8 22.7 22.5 82 82 5.2
13 1014.5 22.7 19.0 16.4 14.3 75 45 0.2
14 1015.1 19.5 17.6 15.6 13.0 74 83 Trace
15 1013.4 20.7 19.6 18.3 17.1 86 88 20.2
16 1014.8 20.7 17.4 12.8 15.4 88 93 34.8
17 1021.4 13.2 12.2 10.5 6.3 67 88 -
18 1023.5 15.9 12.3 9.7 7.4 72 87 -
19 1024.1 18.2 14.9 12.0 8.7 66 58 Trace
20 1024.9 18.6 15.5 13.2 8.2 62 68 -
21 1024.2 17.2 14.5 12.3 6.6 59 72 -
22 1021.4 19.1 15.9 13.0 7.1 56 42 -
23 1018.7 22.6 18.8 15.9 12.9 69 33 -
24 1016.4 23.7 20.4 17.8 16.4 78 17 -
25 1016.5 23.9 20.7 18.9 17.4 82 39 -
26 1016.4 22.9 21.2 20.4 18.0 82 86 -
27 1017.2 25.0 22.0 20.2 17.7 77 60 -
28 1018.8 23.2 21.1 20.2 16.7 76 42 -
29 1020.2 23.2 20.9 19.5 16.2 75 71 Trace
30 1021.4 22.1 19.7 17.8 14.6 73 29 Trace
Mean/Total 1017.7 23.2 20.5 18.3 15.1 72 61 60.4
Normal* 1018.0 24.0 21.4 19.4 15.3 70 53 35.1
Station Hong   Kong   Observatory

Date
NOVEMBER
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 12 9.7 18.10 5.9 040 21.6
2 0 9.8 18.39 8.5 010 48.3
3 0 5.2 14.47 3.6 010 37.8
4 0 6.6 15.57 2.8 010 22.7
5 4 4.5 12.98 2.6 050 16.4
6 0 8.8 15.77 3.4 070 20.3
7 0 5.9 14.09 3.0 060 22.4
8 0 0.3 7.88 2.5 080 15.3
9 0 4.0 9.19 2.0 070 11.4
10 0 10.2 18.33 3.9 210 12.6
11 0 5.4 12.34 3.2 130 19.0
12 0 0.9 7.47 2.8 170 20.0
13 0 7.8 15.96 3.3 360 29.3
14 4 0.2 4.03 2.8 010 25.2
15 4 - 2.86 2.3 060 43.7
16 0 0.1 5.29 2.7 350 33.9
17 0 - 4.42 2.7 350 45.9
18 2 1.4 8.74 2.9 360 26.3
19 7 8.1 16.26 3.4 360 23.9
20 0 7.5 15.98 4.2 360 35.8
21 0 2.3 8.70 3.0 360 33.0
22 7 9.0 16.54 2.8 360 26.4
23 12 8.9 16.97 2.5 040 22.3
24 19 9.6 16.08 2.4 030 11.8
25 16 9.3 16.34 3.1 040 18.7
26 0 5.1 13.53 2.8 060 30.8
27 4 6.5 13.87 3.2 040 16.8
28 3 9.0 16.27 3.3 070 28.8
29 23 6.4 11.85 3.1 060 23.4
30 24 8.9 14.11 2.9 010 20.0
Mean/Total 141 171.4 12.75 97.6 360 25.5
Normal* 153.0§ 178.2 12.64 112.5 080 27.9
Station Hong   Kong
International   Airport
King's   Park Waglan   Island^

The minimum pressure recorded at the Hong Kong Observatory was 1005.5 hectopascals at 1548 HKT on 10 November.

The maximum air temperature recorded at the Hong Kong Observatory was 30.3 degrees C at 1249 HKT on 1 November.

The minimum air temperature recorded at the Hong Kong Observatory was 9.7 degrees C at 0536 HKT on 18 November.

The maximum gust peak speed recorded at Waglan Island was 70 kilometres per hour from 010 degrees at 0533 HKT on 2 November.

The maximum instantaneous rate of rainfall recorded at the Hong Kong Observatory was 55 millimetres per hour at 1825 HKT on 12 November.

# 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.

* 1971-2000 Climatological Normal, unless otherwise specified

§ 1997-2008 Mean value