APPENDIX 55
(Chapter 21: The Environment) Climatological Summary, 1999
APPENDICES
Mean
pressure
Maxi-
mum
Mini-
Mean
mun
Mean
Mean
Mean
Total
Prevailing
Mean
at mean air temp- sea level
air temp-
air temp-
dew
relative
amount
bright
Total
wind
wind
erature
erature
erature
point
humidity
of cloud
sunshine
rainfall
direction
speed
Month
(hectopascals)
(°C)
(°C)
(°C)
(°C)
از در سه اسم
(%)
(hours)
(mm)
(degrees) (km/h)
January
1 018.3
25.0
17.3
10.3
11.6
February
1 020.2
27.3
18.7
12.2
12.0
March
1011.5
29.5
20.4
12.7
17.5
April
1011.3
31.1
24.3
18.3
20.2
May
1 009.7
31.5
24.9
17.0
21.5
June
1 005.5
33.4
28.9
25.0
24.7
2 2 2 2 9 2
70
60
133.3
4.5
060
24.9
67
40
182.6
Trt
070
24.9
84
76
99.4
23.6
070
25.1
79
75
139.7
176.9
070
27.2
82
83
109.8
177.8
070
25.1
79
74
191.0
197.4
190
20.0
July
1 003.0
33.7
29.2
23.8
25.4
August
1 005.0
35.1
28.3
23.7
24.9
September
1 006,7
32.8
27.8
22.8
23.5
October
1 013.7
31.6
26.2
19.9
20.9
November
1 017.1
27.7
22.2
13.7
16.2
December
1 021.3
23.6
16.8
5.8
8.4
Year
1011.9
35.1
23.8
5.8
18.9
50 000 R 3 R
81
82
78
73
70
60
51
75
2 2 2 2 8 5 5
82
158.0
203.8
220
20.9
80
138.5
892.0
220
19.7
70
148.5
365.7
010
21.7
62
195.2
38.8
080
28.3
53
191.2
15.7
070
29.1
165.4
32.9
010
28.0
67
1 852.6
2 129.1
070
24.6
Note: Trace of rainfall (amount less than 0.05 mm).
Climatological Normals (1961-1990)
Mean
pressure
at mean sea level
Maxi-
mum
air temp-
erature
air temp-
Mini-
Mean
mum
air temp-
Mean dew
Mean relative
Mean amount
Total bright Total
Prevailing
Mean
wind
wind
erature
erature
point
humidity
of cloud
sunshine
rainfall direction
speed
Month
(hectopascals)
(°C)
(°C)
(°C)t
(°C)
(%)
(%)
(hours) (mm) (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
I 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
1 008.8
35.2
27.6
18.4
23.3
78
63
181.7
299.7
090
21.9
October
1 014.0
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
I 012.9
36.1
23.0
0.0
18.6
77
65
1 948.1
2 214.3
080
22.6
Note: These extreme values are for the period 1884-1939; 1947-1999.
Source: Hong Kong Observatory.
526
(Enquiry Telephone No.: 2926 8444)