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

Date
January
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 1026.5 15.9 13.8 11.4 8.0 68 84 Trace
2 1025.4 16.4 14.8 13.5 8.9 68 87 Trace
3 1024.3 17.3 16.2 14.9 13.4 84 91 0.1
4 1022.8 20.9 18.8 16.8 15.8 83 87 0.1
5 1020.5 22.7 19.8 18.9 17.6 87 88 -
6 1021.5 20.0 18.6 17.6 15.7 83 92 Trace
7 1021.4 20.0 18.5 17.4 15.6 83 89 -
8 1021.3 20.7 19.2 17.2 16.5 84 94 0.2
9 1022.3 18.7 17.8 17.2 15.1 84 89 -
10 1020.2 20.8 19.2 17.4 16.0 82 88 -
11 1018.6 23.3 20.6 18.2 17.7 84 55 -
12 1018.3 22.8 20.9 19.3 17.9 83 64 Trace
13 1019.3 19.8 18.5 17.7 16.8 89 91 Trace
14 1018.8 19.7 18.5 17.6 16.2 86 94 Trace
15 1018.8 21.1 19.0 17.0 16.9 88 88 4.0
16 1020.5 19.9 17.3 15.9 12.2 72 87 -
17 1022.2 19.5 16.7 14.6 11.3 70 55 -
18 1022.1 18.5 17.1 15.8 12.6 75 79 -
19 1019.6 21.9 18.8 17.1 14.2 75 85 0.2
20 1018.9 23.4 20.4 18.1 15.3 73 76 0.1
21 1021.8 20.0 17.8 15.8 11.0 64 66 -
22 1022.3 19.1 16.0 13.1 6.2 53 21 -
23 1021.0 19.2 16.2 13.7 8.8 62 3 -
24 1020.6 19.6 16.9 15.0 11.5 71 10 -
25 1021.2 22.2 18.7 16.1 12.3 67 13 -
26 1023.1 21.2 18.2 16.7 13.3 73 17 -
27 1023.6 19.4 16.9 15.6 11.5 71 80 -
28 1021.6 20.3 17.5 15.7 11.4 68 63 -
29 1021.4 20.5 18.5 16.9 13.7 74 39 -
30 1020.8 21.6 19.3 17.2 14.4 73 69 -
31 1018.9 24.5 21.7 18.9 17.2 76 67 -
Mean/Total 1021.3 20.4 18.1 16.4 13.7 76 68 4.7
Normal* 1020.3 18.6 16.3 14.5 11.4 74 61 24.7
Station Hong   Kong   Observatory

EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
JANUARY 2019 (Table 2)

Date
January
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 4.6 12.02 2.6 350 26.5
2 0 0.1 5.73 2.1 360 26.3
3 0 - 3.15 0.5 030 26.0
4 5 1.3 8.66 1.1 060 30.1
5 0 0.5 7.15 1.9 330 6.3
6 0 - 5.28 1.9 020 20.0
7 10 - 7.77 1.2 070 27.2
8 6 - 5.26 1.4 070 18.3
9 0 2.7 8.34 1.6 070 32.5
10 9 2.6 9.07 1.8 060 24.5
11 13 6.5 13.31 1.6 040 12.8
12 15 8.6 13.83 2.8 020 6.7
13 3 - 4.10 1.1 070 26.9
14 12 0.1 5.88 1.0 070 25.8
15 2 1.2 6.76 2.0 060 21.8
16 0 0.8 7.02 2.7 360 26.5
17 1 8.1 16.14 2.6 360 20.3
18 4 2.0 6.95 1.5 060 26.4
19 3 1.7 9.51 1.6 050 20.6
20 6 5.2 12.69 3.4 030 20.6
21 1 4.2 11.74 3.5 360 25.6
22 16 10.0 17.51 3.4 360 23.6
23 0 9.8 17.11 1.9 010 15.5
24 0 10.0 18.27 2.8 060 25.6
25 2 10.2 17.96 2.7 050 14.8
26 4 8.6 15.66 3.1 070 28.5
27 2 7.0 13.77 3.0 070 37.5
28 0 3.3 11.25 2.2 060 28.8
29 0 9.8 19.33 2.9 040 24.6
30 0 6.7 15.04 2.6 050 25.8
31 0 7.7 14.22 3.0 010 11.8
Mean/Total 114 133.3 10.98 67.5 060 22.8
Normal* 226.8§ 143.0 10.17 71.3 060 25.3
StationHong   Kong
International   Airport
King's   Park Waglan   Island^

The minimum pressure recorded at the Hong Kong Observatory was 1016.3 hectopascals at 1449 HKT on 12 January.

The maximum air temperature recorded at the Hong Kong Observatory was 24.5 degrees C at 1459 HKT on 31 January.

The minimum air temperature recorded at the Hong Kong Observatory was 11.4 degrees C at 0709 HKT on 1 January.

The maximum gust peak speed recorded at Waglan Island was 63 kilometres per hour from 070 degrees at 0045 HKT on 4 January.

The maximum 1-minute mean rainfall rate recorded at King's Park was 11 millimetres per hour at 0511 HKT on 15 January.

# 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

§ 1997-2018 Mean value

Last revision date: <04 Feb 2019>