Skip to main content
Hong Kong Observatory Brand Hong Kong - Asia's world city
GovHK Traditional Chinese Simplified Chinese Search
Search Site Map Contact Us
Print Version
Back
Print Version

EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG,
JANUARY 2017 (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 1021.7 20.8 19.2 18.4 15.6 80 72 -
2 1020.2 23.3 20.2 18.4 16.7 81 28 -
3 1019.8 21.3 20.0 18.9 17.1 83 56 -
4 1018.7 21.7 19.9 18.7 16.3 80 51 -
5 1016.9 23.4 21.1 18.9 17.5 80 61 -
6 1015.1 25.0 21.6 19.7 17.8 80 43 -
7 1013.9 22.8 21.1 19.7 17.3 79 68 -
8 1013.4 25.5 22.6 20.5 18.1 76 50 -
9 1016.3 21.8 20.6 19.7 16.7 78 66 -
10 1018.1 20.5 19.4 18.8 15.7 79 72 -
11 1018.1 19.7 19.1 18.2 15.4 80 86 -
12 1015.5 20.3 19.0 16.9 15.7 81 93 Trace
13 1015.7 17.1 15.9 15.1 13.1 84 88 0.5
14 1017.9 16.5 15.7 14.5 13.5 87 92 1.0
15 1020.5 16.8 15.5 14.3 13.0 85 100 1.5
16 1020.4 17.4 16.3 14.7 12.9 80 93 0.4
17 1021.1 19.2 18.0 16.7 13.7 76 88 -
18 1021.2 20.0 18.9 18.0 16.5 86 88 Trace
19 1020.1 24.1 20.4 18.7 17.6 85 76 -
20 1022.4 20.6 18.3 16.2 12.3 69 51 Trace
21 1025.3 19.0 16.7 14.6 10.6 67 35 -
22 1026.1 19.8 16.4 13.6 7.9 58 9 -
23 1025.7 19.4 16.8 15.2 11.4 71 61 -
24 1025.4 18.9 17.0 15.7 11.9 72 79 -
25 1025.5 20.9 17.5 15.9 13.3 76 42 -
26 1024.3 19.8 17.3 16.2 12.8 75 45 -
27 1022.6 21.3 17.5 14.4 11.3 69 13 -
28 1018.6 18.8 17.3 16.4 13.5 79 78 0.3
29 1016.6 21.5 19.1 18.1 17.0 88 88 2.4
30 1018.2 23.4 20.2 17.4 18.4 90 88 1.2
31 1020.2 17.6 16.7 15.9 14.6 87 88 0.5
Mean/Total 1019.8 20.6 18.5 17.0 14.7 79 66 7.8
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 2017 (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 12.07 1.8 060 34.2
2 0 9.3 16.53 1.9 070 17.7
3 5 3.8 8.57 1.7 070 26.1
4 0 6.3 13.64 2.0 070 27.7
5 0 1.7 8.29 1.2 040 14.3
6 6 9.1 16.28 2.5 040 20.0
7 2 7.3 15.62 2.3 060 20.8
8 16 8.2 14.42 2.5 030 6.8
9 3 3.1 8.17 2.2 070 23.3
10 0 5.9 12.79 2.5 070 36.6
11 13 1.7 7.40 1.2 070 37.8
12 15 - 2.73 1.4 070 28.0
13 0 - 2.65 0.7 010 22.9
14 0 - 3.86 1.4 050 29.8
15 0 - 3.81 1.0 020 29.3
16 0 1.5 7.86 1.8 070 35.5
17 2 1.9 9.90 1.4 070 37.3
18 1 - 4.03 2.0 060 24.2
19 8 6.9 15.47 3.2 060 12.8
20 0 9.7 17.29 3.4 010 26.9
21 6 8.1 15.79 3.0 020 20.2
22 0 9.8 17.67 2.4 020 18.8
23 3 8.3 15.80 2.4 070 33.0
24 0 7.1 14.64 2.6 070 43.0
25 0 9.8 17.33 2.1 070 30.7
26 0 9.1 17.29 2.4 080 27.4
27 0 10.0 19.16 2.2 060 18.8
28 0 0.7 7.26 0.9 060 30.4
29 0 0.6 7.75 0.9 050 28.2
30 1 0.6 6.82 1.5 040 22.8
31 0 - 3.29 0.9 070 34.3
Mean/Total 81 145.1 11.10 59.4 070 26.4
Normal* 239.8§ 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 1011.2 hectopascals at 1519 HKT on 8 January.

The maximum air temperature recorded at the Hong Kong Observatory was 25.5 degrees C at 1321 HKT on 8 January.

The minimum air temperature recorded at the Hong Kong Observatory was 13.6 degrees C at 0741 HKT on 22 January.

The maximum gust peak speed recorded at Waglan Island was 65 kilometres per hour from 080 degrees at 2121 HKT on 30 January.

The maximum 1-minute mean rainfall rate recorded at the Hong Kong Observatory was 18 millimetres per hour at 1521 HKT on 29 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

§ 1997-2016 Mean value

Last revision date: <02 Feb 2017>