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EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
OCTOBER 2018 (Table 1)

Date
October
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 1013.9 29.6 26.8 23.2 20.6 70 70 2.9
2 1014.9 30.4 27.2 25.3 20.2 67 33 -
3 1015.3 30.5 26.9 25.0 20.3 68 30 -
4 1013.8 30.5 26.9 24.2 16.5 54 8 -
5 1012.1 31.4 27.1 23.6 12.1 40 16 -
6 1013.4 30.9 26.8 23.5 14.5 48 18 -
7 1014.7 30.5 27.1 25.1 20.9 69 43 -
8 1014.2 29.8 26.7 24.3 21.8 75 60 2.0
9 1013.7 29.3 26.5 25.1 22.4 78 72 0.6
10 1014.7 29.2 24.8 22.5 21.8 83 82 42.8
11 1017.6 24.7 23.2 22.3 17.9 72 88 -
12 1018.9 27.1 23.8 22.0 18.6 73 85 0.3
13 1017.5 26.8 24.7 22.7 19.2 72 86 0.4
14 1015.5 27.3 25.3 23.6 21.3 79 82 0.6
15 1014.6 27.9 25.6 24.3 22.6 84 83 31.4
16 1013.2 25.8 24.3 23.2 22.8 92 91 8.9
17 1012.5 25.2 23.5 21.9 20.6 84 90 1.5
18 1014.7 23.9 22.5 20.9 20.3 87 91 12.6
19 1017.2 26.0 24.2 23.0 19.9 77 87 0.2
20 1018.6 24.9 24.0 23.3 19.9 78 86 Trace
21 1017.6 27.3 24.8 23.2 20.5 77 49 Trace
22 1015.9 27.4 25.0 23.7 21.5 81 62 Trace
23 1016.5 27.4 25.3 24.1 21.3 79 78 0.1
24 1016.8 27.4 25.2 24.0 21.4 80 78 Trace
25 1017.0 27.7 25.5 24.4 21.6 79 54 -
26 1016.5 28.6 26.3 23.9 21.5 76 41 -
27 1018.1 27.9 25.4 23.7 17.4 61 53 -
28 1017.4 27.5 24.3 21.7 14.3 54 13 -
29 1015.1 28.9 25.2 22.2 8.5 35 4 -
30 1014.8 28.5 25.7 23.4 8.2 33 24 -
31 1014.2 27.2 25.0 22.9 9.1 37 83 -
Mean/Total 1015.5 28.0 25.3 23.4 18.7 69 59 104.3
Normal* 1014.1 27.8 25.5 23.7 20.2 73 58 100.9
Station Hong   Kong   Observatory

EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
OCTOBER 2018 (Table 2)

Date
October
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 5.2 14.41 3.9 080 19.7
2 0 9.8 20.03 4.5 080 24.8
3 0 10.4 20.38 4.8 090 21.0
4 0 10.7 21.79 6.5 350 14.4
5 0 10.8 22.86 6.1 350 24.5
6 0 10.9 22.37 4.3 350 19.9
7 0 10.4 22.17 5.0 080 20.3
8 0 9.5 20.46 4.4 080 23.5
9 0 4.5 12.23 2.8 090 16.8
10 3 1.6 6.99 2.1 360 16.1
11 0 0.3 7.75 2.7 360 28.8
12 0 4.1 14.13 3.1 080 29.1
13 0 5.5 16.20 3.4 080 34.6
14 0 2.7 12.68 2.8 080 28.3
15 0 2.8 10.42 2.4 090 20.5
16 1 0.6 5.60 1.5 010 13.4
17 0 - 5.90 1.8 010 18.6
18 0 0.2 6.14 1.2 050 40.5
19 0 1.6 11.64 3.0 070 49.2
20 0 3.2 9.80 2.6 070 40.6
21 0 8.1 18.53 3.4 080 30.1
22 0 4.6 10.88 2.1 070 12.6
23 4 0.1 8.67 2.2 070 17.1
24 0 4.5 12.53 2.6 080 25.9
25 1 7.0 16.00 3.0 080 21.3
26 8 8.2 14.54 4.3 360 12.7
27 0 6.7 13.69 3.7 360 25.8
28 0 10.6 20.12 4.7 360 13.9
29 0 10.6 21.28 6.0 360 18.7
30 0 10.5 21.10 6.7 360 29.9
31 0 6.2 15.93 6.5 360 39.5
Mean/Total 17 181.9 14.75 114.1 080 24.2
Normal* 130.5§ 193.9 14.05 123.9 080 27.4
StationHong   Kong
International   Airport
King's   Park Waglan   Island^

The minimum pressure recorded at the Hong Kong Observatory was 1009.7 hectopascals at 1430 HKT on 5 October.

The maximum air temperature recorded at the Hong Kong Observatory was 31.4 degrees C at 1441 HKT on 5 October.

The minimum air temperature recorded at the Hong Kong Observatory was 20.9 degrees C at 0629 HKT on 18 October.

The maximum gust peak speed recorded at Waglan Island was 63 kilometres per hour from 070 degrees at 0240 HKT on 19 October.

The maximum 1-minute mean rainfall rate recorded at King's Park was 81 millimetres per hour at 1341 HKT on 10 October.

# 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

§ 1997-2017 Mean value

Last revision date: <02 Nov 2018>