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EXTRACT OF METEOROLOGICAL OBSERVATIONS FOR HONG KONG, MARCH 2018

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

Date
March
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 1012.5 24.8 21.3 19.4 18.9 86 47 -
2 1012.1 24.7 21.3 19.5 17.3 78 80 Trace
3 1011.2 23.6 22.0 21.0 20.4 91 86 -
4 1011.0 27.3 24.0 21.9 22.0 89 86 Trace
5 1012.4 27.8 25.1 23.4 22.1 84 71 -
6 1017.2 23.5 19.8 18.3 16.7 83 82 Trace
7 1016.7 20.6 19.1 17.6 15.5 79 86 Trace
8 1019.4 20.5 14.5 12.5 11.4 82 90 20.3
9 1022.8 19.8 14.8 11.1 7.4 61 12 -
10 1022.1 20.3 16.7 13.7 10.0 66 12 -
11 1021.5 22.5 18.0 15.3 12.1 69 20 -
12 1019.0 23.3 19.6 16.9 13.9 71 10 -
13 1016.7 24.5 20.9 18.1 16.3 75 48 -
14 1014.8 20.8 20.2 19.4 17.1 83 88 2.4
15 1013.2 25.1 22.1 20.1 19.1 84 76 Trace
16 1014.8 26.3 22.7 20.3 19.2 81 39 -
17 1017.3 22.0 19.5 18.6 16.9 85 87 Trace
18 1016.0 24.1 20.8 19.2 17.7 83 85 Trace
19 1011.7 25.6 22.8 20.7 20.2 86 87 Trace
20 1013.0 25.3 21.4 16.9 15.5 70 55 Trace
21 1016.7 24.1 18.7 14.5 8.2 51 5 -
22 1016.9 24.1 19.5 16.2 10.6 57 9 -
23 1018.4 24.7 20.5 17.2 14.0 68 11 -
24 1018.9 23.8 21.1 19.6 16.8 77 78 Trace
25 1019.4 24.5 21.7 20.5 15.6 68 80 Trace
26 1018.3 26.5 22.6 20.4 17.0 71 69 -
27 1016.2 26.0 22.8 20.8 17.7 73 50 -
28 1014.7 26.7 22.7 21.0 18.5 77 41 -
29 1014.3 27.0 22.9 21.1 18.8 78 69 -
30 1015.4 27.9 23.5 21.2 18.8 76 46 -
31 1015.5 27.5 23.5 21.4 16.3 65 31 -
Mean/Total 1016.1 24.4 20.8 18.6 16.2 76 56 22.7
Normal* 1016.0 21.4 19.1 17.2 15.7 82 79 82.2
Station Hong   Kong   Observatory

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

Date
March
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 1 7.4 18.20 3.1 030 10.2
2 3 5.4 16.23 2.9 040 18.0
3 0 0.5 9.69 1.5 020 14.0
4 0 0.5 6.58 1.2 140 8.0
5 0 7.9 17.26 3.6 160 7.0
6 1 1.8 9.68 3.4 060 32.0
7 0 1.1 9.55 2.4 060 31.1
8 0 - 3.85 2.4 360 41.4
9 0 10.7 24.94 3.2 360 27.2
10 0 10.8 25.29 4.2 060 25.8
11 0 10.7 23.93 3.2 060 28.3
12 0 10.7 22.25 3.4 030 17.4
13 0 9.2 20.94 2.9 030 14.9
14 0 - 3.38 0.6 030 21.8
15 0 3.3 10.52 1.6 010 10.8
16 2 9.4 20.08 3.3 090 9.6
17 0 - 5.30 1.7 070 42.9
18 0 4.9 15.54 2.6 050 24.9
19 4 2.5 9.72 1.7 040 10.2
20 0 6.2 16.12 5.2 360 25.0
21 0 11.2 25.21 5.0 360 30.1
22 0 10.7 23.19 3.4 360 18.8
23 0 11.0 23.78 3.8 060 21.3
24 0 4.7 15.72 3.5 060 28.0
25 0 4.3 13.39 3.3 060 28.5
26 0 6.8 15.75 3.2 030 11.7
27 0 8.2 18.01 3.1 030 10.5
28 0 8.7 21.47 3.2 070 15.3
29 1 7.1 19.84 3.8 050 17.5
30 1 9.9 22.84 5.2 080 17.1
31 0 10.6 24.91 4.6 070 26.0
Mean/Total 13 196.2 16.55 96.2 060 20.8
Normal* 112.1§ 90.8 9.96 70.5 060 23.0
StationHong   Kong
International   Airport
King's   Park Waglan   Island^

The minimum pressure recorded at the Hong Kong Observatory was 1008.5 hectopascals at 1624 HKT on 19 March.

The maximum air temperature recorded at the Hong Kong Observatory was 27.9 degrees C at 1354 HKT on 30 March.

The minimum air temperature recorded at the Hong Kong Observatory was 11.1 degrees C at 0633 HKT on 9 March.

The maximum gust peak speed recorded at Waglan Island was 65 kilometres per hour from 360 degrees at 0035 HKT on 21 March.

The maximum 1-minute mean rainfall rate recorded at the Hong Kong Observatory was 32 millimetres per hour at 0753 HKT on 8 March.

# 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

§ 1997-2017 Mean value