288
Appendix 39
(Chapter 18: The Environment)
Climatological Summary, 1978
Mean pressure
Maxi-
Mini-
Month
mum Mean mum at mean air tem- air tem- air tem- sea level perature perature perature
dew relative amount point humidity of cloud
Mean Mean Mean
Total
bright Total sunshine rainfall
Prevailing
Mean
wind
wind
direction
speed
kilopascals
°C
°C
°C
°C per cent per cent
hours
mm
points
m/s
January
102-03
24-4
15-9
6.9
10.4
72
63
147.0
22.9
N
6.2
February
102.11
24.9
16-0
7.3
11.5
76
79
88.4
16.2
N
5-4
March
101.49
26.7
18-1
11.2
16.3
90
95
21.7
143.8
NNE
5.6
April
101.25
31.5
21.9
15.1
19.7
88
83
76.1
237.0
ENE
4.4
May
100-89
32.0
25-0
21.0
22.4
86
82
89.4
300-4
E
5.0
June
100.60
33.4
28.4
23.6
24.8
82
73
171.3
242-4
SW
4.3
July
100-44
34.2
28.9
23.8
24.6
78
62
244-7
555-2
SW
5.9
August
100.30
33.6
28.2
24.5
25.0
83
74
179.2
230-8
E
5-5
September
100-89
33.3
27.9
23.4
23.8
79
67
210-3
271.8
- E
6.6
October
101.33
31.2
24-0
13-5
18-1
72
68
148-3
501-4
E
9.4
November-
101.85
26-4
20.9
13-6
15.9
73
54
177.8
55.8
ENE
7.6
December
102.09
26.6
18.6
13.1
13.1
72
46
201-0
15.3
ENE
7.4
Mean
101-27
22.8
18-8
79
71
E
6·1
Total
1755.2 2593.0
Climatological Normals
(1947-1976)
Month
kilopascals
*C*
°C
*C*
°C per cent per cent
hours
mm
pointst
m/st
January
102.01
26.9
15.6
0.0
9.9
72
58
157.2
28-5
ENE
6.6
February
101-83
27-8
15.9
2.4
11.8
79
71
109-0
44-9
ENE
6·4
March
101.63
30.1
18-4
6.2
14.9
82
76
106-3
49.3
ENE
5.9
April
101.31
33.4
21.9
9.9
18-8
84
76
119.3 135.3
E
5.3
May
100.92
35.5
25.9
15-4
22.7
84
73
164.2
289.3
E
5.2
June
100.59
35-6
27.6
19-2
24.4
84
77
149-4 457-5
SW
5.7
July
100-55
35-7
28.5
22.2
24.9
82
66
226-0
319.3
SW
5.2
August
100.53
36.1
28-1
21.6
24.8
83
66
206.1 420-2
E
5.1
September
100-84
35.2
27.5
18.4
23.3
80
62
191-2 330-8
E
5.9
October
101.39
34.3
24-9
13-5
19.4
73
54
209-0 107.2
E
7.3
November
101.75
31.8
21.3
6.5
15.1
70
53
189.4 38.2
December
101.96
28-7
17.5
4.3
11-4
70
54
171.9 25.9
屈屈
E
7.4
E
6.9
Mean
101.28
22.8
18.5
Total
21
78
65
E
6.1
1998-8 2246-4
Note: * 1884–1939;
1947-78
† 1953-1978 as record commenced in 1953 at Waglan Island
1 kilopascal = 10 millibars
1 m/s 1.94 knots
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