488
APPENDIX 55
(Chapter 21: The Environment) Climatological Summary, 1998
APPENDICES
Mean
pressure
Maxi-
mum
Mini-
Mean
mum
Mean
at mean air temp- sea level
air temp-
air temp-
dew
erature
erature
erature
point
Mean relative humidity
Mean
Total
Prevailing
Mean
amount bright
Total
wind
wind
of cloud
sunshine
rainfall
direction
speed
Month
(hectopascals)
(°C)
(°C)
(°C)
(°C)
(%)
(%)
(hours) (mm)
(degrees)
(km/h)
January
I 019.2
25.9
16.8
9.7
13.4
February
1 018.1
26.0
17.2
8.9
14.3
March
1 016.3
27.6
19.1
12.4
16.5
April
1 013.0
30.8
24.8
19.3
21.3
May
1 009.6
32.2
26.8
21.2
23.8
June
1 006.9
32.7
28.3
21.8
25.3
July
1 007.3
33.3
29.0
23.7
25.2
August
1 008.3
34.4
29.5
24.8
25.4
September
1 008.3
32.1
27.8
24.3
23.3
October
1 011.6
32.3
26.1
21.7
20.1
November
1 015.6
29.1
23.2
19.3
17.7
December
1 019.6
25,7
19.1
13.8
13.2
Year
1 012.8
34.4
24.0
8.9
20.0
20 * * 8 = = = ARA
81
77
86.0
48.9
060
28.9
83
86
56.4
153.7
020
24.6
86
86
82.2
55.3
050
25.8
82
78
123.4
237.1
060
17.9
84
76
139.3
335.2
100
18.7
84
87
90.0
814.5
210
24.7
80
78
222.1
267.2
230
23.2
79
65
234.3
245.4
230
16.5
78
64
159.9
230.9
080
23.3
71
59
180.4
133.9
080
30.4
72
60
137.5
28.8
070
26.1
70
61
153.8
13.7
010
26.9
79
73
1 665.3
2 564.6
070
23.9
Climatological Normals (1961-1990)
Mean pressure
at mean sea level
Maxi-
mum
air temp-
Mean air temp-
Mini-
mum
Mean
Mean
air temp-
dew relative
Mean
amount
erature
erature
erature
point
humidity of cloud
Total bright sunshine
Month
(hectopascals)
(°C)*
(°C)
(°C)*
(°C)
(%)
(%)
Total rainfall direction
(hours) (mm) (degrees) (km/h)
Prevailing
Mean
wind
wind
speed
January
1 020.2
26.9
15.8
0.0
10.2
71
58
152.4
23.4
070
24.0
February
1 018.7
27.8
15.9
2.4
11.8
March
1 016.2
30.1
18.5
4.8
15.0
81
April
1 013.1
33.4
22.2
9.9
19.0
May
1 009.1
35.5
25.9
15.4
22.6
June
I 006.0
35.6
27.8
19.2
24.4
July
1 005.3
35.7
28.8
21.7
24.9
August
1 005.1
36.1
28.4
21.6
24.8
81
September
October
1 008.8
35.2
27.6
18.4
23.3
1 014.0
34.3
25.2
13.5
19.8
November
1 017.9
31.8
21.4
6.5
15.2
December
Year
1 020.2
28.7
17.6
4.3
11.2
1 012.9
36.1
23.0
0.0
18.6
77
00 00 00 00 00 R 8 0 F
78
73
97.7
48.0
070
23.8
76
96.4
66.9
070
22.1
83
78
108.9
161.5
080
19.7
83
74
153.8
316.7
090
19.2
82
75
161.1
376.0
090
21.6
80
65
231.1
323.5
230
20.0
66
207.0
391.4
090
18.5
78
63
181.7
299.7
090
21.9
73
56
195.0
144.8
090
27.6
69
53
181.5
35.1
080
27.2
68
49
181.5
27.3
080
25.5
65
1 948.1
2 214.3
080
22.6
**
Note: These extreme values are for the period 1884-1939; 1947–1997.
Source: Hong Kong Observatory.
(Enquiry Telephone No.: 2926 8444)