APPENDIX 51
(Chapter 16: The Environment) Climatological Summary, 2001
APPENDICES
Mean
Maxi-
mum
air tenip-
Mini-
Mean
711/71
Mean
air temp-
air temp-
dew
Mean relative
Mean
Total
Prevailing
Mean
amount
bright
Total
wind
wind
pressure
erature
erature
erature
point
humidity
of cloud
sunshine
rainfall
direction
speed
Month
(hectopascals)
(°C)
(°C)
(c)
(°C)
(%)
(%)
(hours)
(mm)
(degrees)
(km/h)
January
1017.5
23.3
17.3
9.8
13.3
78
68
112.2
47.6
060
24.9
February
1 016.9
26.0
17.6
10.5
13.7
79
66
127.9
10.9
050
22.1
March
1 014.9
27.9
20.6
14.3
16.2
77
April
1 012.0
31.8
22.4
15.0
19.7
85
2
72
140.4
56.5
060
20.5
86
79.0
133.0
070
21.6
May
1 007.5
32.2
26.7
22.9
23.3
82
79
149.5
162.0
080
17.4
Junc
1 005.6
33.2
27.6
23.7
24.8
85
81
114.0
1 083.6
220
20.2
July
1 004.0
33.2
28.1
24.3
25.0
84
August
1 005.4
34.0
29.2
24.3
25.2
80
ER
77
136.3
656.4
100
25.0
70
207.9
318.9
090
17.2
September
1 007.4
33.8
28.1
24.6
23.1
X
75
60
162.3
563.3
360
19.2
October
1 014.7
31.2
26.1
22.0
20.7
73
61
205.9
10.7
080
26.9
November
1 018.6
28.3
21.5
13.1
14.2
65
43
206.4
4.3
070
26.3
December
1 022.0
26.2
18.3
8.9
12.9
72
62
143.0
44.6
060
26.4
Year
1 012.2
34.0
23.6
8.9
19.3
78
69
1 784.8
3 091.8
070
22.3
Climatological Normals (1)
(1961–1990)
Mean
pressure
Maxi-
mum
air temp-
crature
Mean
Mini-
777[477]
Mean
air temp-
air temp-
dew
Mean relative
Mean
amount
Total bright
Prevailing
Mean
erature
erature
point
humidity
of cloud
sunshine
Total rainfall
wind direction
wind
speed
Month
(hectopascals)
(Ct
(°C)
(°C)t
(°C)
ر مسٹر یا تم
(%)
(hours)
(num)
(degrees) (km/h)
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
78
73
97.7
48.0
070
23.8
March
1 016.2
30.1
18.5
4.8
15.0
81
76
96.4
66.9
070
22.1
April
1 013.1
33.4
22.2
9.9
19.0
83
78
108.9
161.5
080
19.7
May
1 009.1
35.5
25.9
15,4
22.6
83
74
153.8
316.7
090
19.2
June
1 006.0
35.6
27.8
19.2
24.4
82
75
161.1
376.0
090
21.6
July
1 005.3
35.7
28.8
21.7
24.9
80
65
231.1
323.5
230
20.0
August
1 005.1
36.1
28.4
21.6
24.8
81
66
207.0
391.4
090
18.5
September
I 008.8
35.2
27.6
18.4
23.3
78
63
181.7
299.7
090
21.9
October
I 014.0
34.3
25.2
13.5
19.8
73
56
195.0
144.8
090
27.6
November
1 017.9
31.8
21.4
6.5
15.2
69
53
181.5
35.1
080
27.2
December
1 020.2
28.7
17.6
4.3
11.2
68
49
181.5
27.3
080
25.5
Year
1 012,9
36.1
23.0
0.0
18.6
77
65
1 948.1
2 214.3
080
22.6
Notes:
(1) The World Meteorological Organization (WMO) defines climatological standard normals as averages of climatological data computed for the following consecutive periods of 30 years: 1 January 1901 to 31 December 1930, 1 January 1931 to 31 December 1960, 1 January 1961 to 31 December 1990, 1 January 1991 to 31 December 2020 etc.
t These extreme values are for the period 1884-1939; 1947–2001.
Source: Hong Kong Observatory.
(Enquiry Telephone No.: 2926 8444)
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