Appendix 38
(Chapter 18: The Environment)
Climatological Summary, 1974
251
Maxi-
Mini-
Month
Mean
pressure at mean sea level
mum air temper- ature
Mean air temper- ature
mum Mean Mean Mean Total air dew relative amount bright temper- point humidity of cloud sunshine
ature
Prevail- Total ing rainfall wind
direction
Mean
wind speed
millibars °C
°C
°C
°C
per cent per cent
hours
mm points knots
January
1,018,2 23,8
16.1
10.8
10.4
71
46
169,1
3.9 E
7.1
February
1,018.9
25.2
14.3
4.2
8.6
71
61
128.1
37.0
E
7.1
March
1,017,6
27.5
17.7
10.5
13.7
78
71
119.4
31.7
E
5.8
April
1,012.4
28.7
22.0
11.8
19.0
83
-71
135.1
231.1
E
5.2
May ...
June ...
July
August
September
October
...
---
1,009.5
32.6
26.6
21.0
23.3
83
64
208.7 203.7
E
5.2
:
:
-
1,004.6
34.0
27.4
22.7
24.0
82
82
116.6 323.3 SW
6.4
1,006.1 33.2
28.7
22.8
24.5
78
64
246.0
184.2 SW
5.2
1,003.6 34.3
28.7
22.9
24.0
76
65
225.1
226.6
E
4.6
1,009.3
32.7
27,6
24.2
23.7
80
60
181.2
131,2
E
3.3
+
1,009.7
32.7
25.3
17.9
20.0
74
70
145.4 718.4
E
7.0
November
+
1,016.0 29.2
20.9
15.5
15.2
71
62
143.7
24.9
NNE
4.1
December
Mean
1,019.4 24.0
17.7
10.8
13.1
75
74
114.2 206.9
E
5.9
1,012.1
22.8
18.3
77
66
E
5.6
Total
:
1,932.6 2,322.9
Climatological Normals
(1884–1939; 1947–60)
J
Month
millibars
°C*
°C
*C*
°C
per cent per cent
hours
-mm
points
knots
January
1,019.9 26.9
15.4
0.0
11.1
75
64
145.4
31.7
E
7.7
February
March
April
May ...
June...
1,018.4 27.8
15.2
2.4
11.7
79
75
100.2
46.9
E
8.9
1,016.1 30.1
17.5
6.2
14.8
83
82
94.7
72.2
E
9.4
:
... 1,012,7
33.4
21.3
9.9
18.8
85
80
114.6
135.8
[T]
E
8.7
1,009.2
35.5
25.2
15.4
22.4
85
20
76
156.1 292.7
E
8.3
1,005.9 35.6
27.3
19.2
24.2
84
78
159.9 401.2
E
7.6
July
1,004.9 35.7
27.9
22,2
24.7
83
69
213.7
371.7 E
6.8
August
1,004,9 36,1
27.7
21.6
24.6
84
67
200.9 370.8
E
6.5
September
1,008,4 35.2
27.1
18.4
23.1
79
61
197.5 278.8
E
7.8
October
1,013.8 34.3
24.6
14.1
19.3
72
November
1,017.5 31.8
20.9
6.5
15.1
69
28
51
218.9
99.2
E
8.5
December
1,019.7 28.7
17.3
4.8
11.9
70
3 535
53
187.9
43.1
E
7.8
172.6
24.9
E
7.2
Mean
1,012.6
22.3
18.5
79
68
E
7.9
Total
1,963.1 2,168.8
1
* 1884-1939; 1947–74.
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