APPENDICES
APPENDIX 45
(Chapter 22: The Environment)
Climatological Summary, 1990
Mean
pressure
Month
at mean sea level
Maxi-
mum
air tem-
Mean air tem-
Mini-
mum
Mean
Mean
Mean
Total
Prevailing
Mean
air tem-
dew
perature
perature
perature
point
relative humidity
amount
bright
Total
wind
wind
of cloud
sunshine
rainfall
direction
speed
hectopascals
°C
°C
°C
°C
per cent
per cent
hours
mm
degrees
km/h
January
1 020.0
22.1
15.9
8.0
12.7
82
79
87.2
47.5
080
28.7
February
1 019.4
23.4
16.2
7.0
13.8
86
85
56.4
195.7
030
24.7
March
1 018.2
27.8
18.5
10.8
14.8
April
1 011.9
29.3
21.4
16.9
19.2
May
1 009.9
30.7
24.6
19.9
21.2
June
1 004.8
32.9
27.9
23.0
25.0
July
1 005.8
33.3
29.0
23.8
25.0
August
1 003.4
36.1
29.5
25.0
24.6
September
1 007.9
33.8
27.8
23.9
23.8
October
1 015.7
30.0
25.1
19.7
19.8
November
1 016.9
27.7
22.1
15.6
17.0
December
1 021.0
25.6
18.8
10.5
12.6
Year
1 012.9
36.1
23.1
7.0
19.1
2 to 2 R P R R 3 2
80
72
121.7
29.9
070
23.7
87
87
73.8
257.6
070
24.5
82
73
146.5
102.4
090
20.1
85
77
149.7
448.1
100
24.8
79
66
248.0
268.0
220
21.7
75
67
205.8
150.1
230
25.1
79
65
168.8
409.9
100
22.3
73
47
233.8
100.7
100
33.8
73
56
160.6
36.9
100
33.5
69
39
218.7
0.1
090
25.5
79
67
1 871.0
2046.9
090
25.7
Climatological Normals (1951-1980)
Month
hectopascals
*C*
°C
°C*
°C
per cent
per cent
hours
mmm
degreest
km/ht
January
1 020.1
26.9
15.6
0.0
9.8
71
59
153.5
26.9
070
23.8
February
1 018.6
27.8
15.9
2.4
11.7
78
71
108.7
41.9
070
23.1
March
1 016.2
30.1
18.5
4.8
15.0
82
76
101.4
54.8
070
21.4
April
1 013.1
33.4
22.1
9.9
18.9
83
76
120.2
139.4
080
19.0
May
1 009.1
35.5
25.9
15.4
22.7
83
73
162.6
298.1
090
18.8
June
1006.2
35.6
27.7
19.2
24.5
84
75
159.2
431.8
090
20.9
July
1005.4
35.7
28.6
21.7
25.0
81
66
230.9
316.8
230
18.9
August
1 005.2
36.1
28.2
21.6
24.8
83
66
206.0
413.4
090
18.2
September
1008.5
35.2
27.5
18.4
23.2
October
1 014.0
34.3
25.0
13.5
19.3
November
1017.6
31.8
21.3
6.5
14.9
December
1 019.8
28.7
17.7
4.3
11.4
Year
1012.8
36.1
22.8
0.0
18.4
A 2 8 8 2
79
72
69
69
78
8 3 3 3 3
62
188.5
320.4
090
21.4
52
209.9
121.2
090
26.1
52
191.5
34.7
080
26.8
52
179.3
25.3
080
24.9
65
2011.6
2 224.7
080
21.9
Note:
* These extreme values are for the period 1884–1939; 1947–1990.
+ These normal values are for 1953–1982.
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