TABLE No. 49.—Meteorological Register kept at Perth, Western Australia, for the Years 1867, 1868, and 1869.—(Continued.)
| 1869. |
JANUARY. |
FEBRUARY. |
MARCH. |
APRIL. |
MAY. |
JUNE. |
JULY. |
AUGUST. |
SEPTEMBER. |
OCTOBER. |
NOVEMBER. |
DECEMBER. |
Mean of the 12 Months. |
| BAROMETER. |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum |
30.13 |
30.25 |
30.25 |
30.40 |
30.40 |
30.47 |
30.51 |
30.46 |
30.30 |
30.24 |
30.28 |
30.29 |
30.33 |
| Minimum |
29.70 |
29.82 |
29.99 |
29.74 |
29.77 |
29.62 |
29.90 |
29.80 |
29.93 |
29.67 |
29.75 |
29.56 |
29.77 |
| Mean |
29.98 |
30.06 |
30.13 |
30.16 |
30.10 |
30.09 |
30.21 |
30.14 |
30.13 |
30.00 |
30.00 |
30.03 |
30.09 |
| Range |
0.43 |
0.43 |
0.26 |
0.66 |
0.63 |
0.85 |
0.61 |
0.68 |
0.37 |
0.57 |
0.53 |
0.73 |
0.56 |
| THERMOMETER (IN THE SHADE.) |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum Temperature at 7h. a.m. |
75.0 |
82.0 |
76.0 |
67.0 |
62.0 |
62.0 |
57.0 |
56.0 |
65.0 |
66.0 |
69.0 |
76.0 |
67.7 |
| Maximum Temperature at noon |
88.0 |
103.0 |
93.0 |
84.0 |
78.0 |
75.0 |
69.0 |
77.0 |
81.0 |
80.0 |
85.0 |
96.0 |
84.3 |
| Maximum Temperature at 4h. 30m. p.m. |
82.0 |
98.0 |
91.0 |
80.0 |
73.0 |
68.0 |
63.0 |
69.0 |
77.0 |
75.0 |
80.0 |
90.0 |
78.8 |
| Minimum Temperature at 7h. a.m. |
60.0 |
62.0 |
58.0 |
46.0 |
42.0 |
43.0 |
42.0 |
40.0 |
50.0 |
51.0 |
56.0 |
61.0 |
50.9 |
| Minimum Temperature at noon |
73.0 |
74.0 |
72.0 |
68.0 |
55.0 |
57.0 |
58.0 |
58.0 |
64.0 |
60.0 |
69.0 |
71.0 |
64.9 |
| Minimum Temperature at 4h. 30m. p.m. |
68.0 |
68.0 |
70.0 |
63.0 |
52.0 |
55.0 |
54.0 |
54.0 |
63.0 |
62.0 |
65.0 |
65.0 |
61.6 |
| Mean Temperature at 7h. a.m. |
68.6 |
71.0 |
67.0 |
56.7 |
53.7 |
51.2 |
48.5 |
49.9 |
58.6 |
58.3 |
63.0 |
68.0 |
59.5 |
| Mean Temperature at noon |
80.7 |
84.8 |
86.6 |
76.6 |
68.8 |
64.2 |
63.5 |
66.5 |
73.5 |
70.9 |
74.1 |
79.6 |
74.1 |
| Mean Temperature at 4h. 30m. p.m. |
74.8 |
83.0 |
80.9 |
70.5 |
63.8 |
60.7 |
59.3 |
62.1 |
70.1 |
65.9 |
70.4 |
75.4 |
69.7 |
| Mean daily Temperature |
74.7 |
79.6 |
78.2 |
67.9 |
62.1 |
58.7 |
57.1 |
59.5 |
67.4 |
65.0 |
69.2 |
74.3 |
67.8 |
| Minimum Temperature at night |
54.0 |
56.0 |
51.0 |
42.0 |
40.0 |
43.0 |
41.0 |
38.0 |
46.0 |
44.0 |
44.0 |
54.0 |
48.6 |
| Approximate mean day and night Temperature |
70.2 |
72.1 |
70.3 |
58.2 |
57.0 |
54.0 |
51.9 |
53.6 |
60.5 |
58.9 |
60.0 |
68.4 |
62.1 |
| HYGROMETER (DRY AND WET BULB THERMOMETERS.) |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum Temperature of the Dew Point at 7h. a.m. |
66.5 |
78.3 |
65.0 |
63.4 |
59.2 |
60.2 |
57.0 |
53.0 |
59.3 |
60.3 |
61.9 |
69.5 |
62.8 |
| Maximum Temperature of the Dew Point at noon |
74.9 |
79.4 |
79.7 |
76.3 |
63.6 |
63.5 |
65.4 |
61.2 |
65.7 |
68.5 |
71.8 |
78.4 |
70.7 |
| Maximum Temperature of the Dew Point at 4h. 30m. p.m. |
69.9 |
79.0 |
74.3 |
73.3 |
61.4 |
62.0 |
58.3 |
63.6 |
64.7 |
64.2 |
69.9 |
74.3 |
67.9 |
| Minimum Temperature of Dew Point at 7h. a.m. |
55.1 |
56.0 |
48.7 |
43.9 |
39.6 |
41.7 |
38.6 |
37.7 |
45.0 |
46.1 |
40.6 |
53.0 |
45.5 |
| Minimum Temperature of Dew Point at noon |
62.3 |
61.2 |
54.5 |
50.5 |
50.2 |
44.3 |
45.0 |
44.5 |
53.8 |
51.8 |
54.8 |
59.7 |
52.7 |
| Minimum Temperature of Dew Point at 4h. 30m. p.m. |
56.7 |
56.7 |
55.8 |
49.0 |
43.9 |
45.0 |
46.6 |
43.9 |
54.0 |
53.0 |
54.1 |
59.1 |
51.5 |
| Mean Temperature of Dew Point at 7h. a.m. |
61.2 |
63.4 |
57.9 |
50.9 |
49.6 |
48.8 |
45.1 |
46.1 |
51.4 |
53.8 |
54.2 |
61.7 |
53.6 |
| Mean Temperature of Dew Point at noon |
68.7 |
70.3 |
68.1 |
61.2 |
56.2 |
54.9 |
52.3 |
54.5 |
59.3 |
59.9 |
62.5 |
69.9 |
61.5 |
| Mean Temperature of Dew Point at 4h. 30m. p.m. |
64.3 |
67.1 |
66.2 |
58.7 |
53.9 |
52.4 |
51.2 |
53.9 |
59.2 |
58.2 |
60.9 |
67.5 |
59.4 |
| Mean daily Temperature of the Dew Point |
64.7 |
66.9 |
64.1 |
56.9 |
53.2 |
52.0 |
49.5 |
51.5 |
56.6 |
57.3 |
59.2 |
66.4 |
58.2 |
| HUMIDITY. |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum degree of Humidity (complete saturation being equal to 1.00) |
0.94 |
0.95 |
0.94 |
0.93 |
1.00 |
1.00 |
1.00 |
1.00 |
0.94 |
1.00 |
0.88 |
0.94 |
0.96 |
| Minimum degree of Humidity (complete saturation being equal to 1.00) |
0.52 |
0.32 |
0.33 |
0.41 |
0.42 |
0.43 |
0.48 |
0.45 |
0.42 |
0.47 |
0.42 |
0.43 |
0.42 |
| Mean degree of Humidity (complete saturation being equal to 1.00) |
0.72 |
0.64 |
0.63 |
0.69 |
0.74 |
0.80 |
0.77 |
0.76 |
0.70 |
0.77 |
0.70 |
0.77 |
0.72 |