TABLE No. 49.—Meteorological Register kept at Perth, Western Australia, for the Years 1867, 1868, and 1869.—(Continued.)
| 1868. |
JANUARY. |
FEBRUARY. |
MARCH. |
APRIL. |
MAY. |
JUNE. |
JULY. |
AUGUST. |
SEPTEMBER. |
OCTOBER. |
NOVEMBER. |
DECEMBER. |
Mean of the 12 Months. |
| BAROMETER. |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum |
30.18 |
30.23 |
30.30 |
30.31 |
30.47 |
30.29 |
30.45 |
30.47 |
30.25 |
30.35 |
30.36 |
30.15 |
30.31 |
| Minimum |
20.75 |
29.72 |
29.88 |
29.69 |
29.75 |
29.25 |
29.70 |
29.85 |
29.50 |
29.60 |
29.86 |
29.82 |
29.70 |
| Mean |
30.01 |
30.01 |
30.06 |
30.08 |
30.12 |
29.86 |
30.13 |
30.20 |
30.00 |
30.04 |
30.10 |
29.99 |
30.05 |
| Range |
0.43 |
0.51 |
0.42 |
0.62 |
0.72 |
1.04 |
0.75 |
0.62 |
0.75 |
0.65 |
0.50 |
0.33 |
0.61 |
| THERMOMETER (IN THE SHADE.) |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum Temperature at 7h. a.m. |
88.0 |
83.0 |
80.0 |
76.0 |
66.0 |
64.0 |
58.0 |
59.0 |
64.0 |
70.0 |
73.0 |
80.0 |
71.9 |
| Maximum Temperature at noon |
98.0 |
98.0 |
107.0 |
90.0 |
82.0 |
72.0 |
68.0 |
75.0 |
76.0 |
80.0 |
94.0 |
99.0 |
86.0 |
| Maximum Temperature at 4h. 30m. p.m. |
95.0 |
94.0 |
101.0 |
82.0 |
78.0 |
69.0 |
64.0 |
72.0 |
70.0 |
73.0 |
83.0 |
93.0 |
81.2 |
| Minimum Temperature at 7h. a.m. |
64.0 |
65.0 |
56.0 |
53.0 |
48.0 |
50.0 |
43.0 |
44.0 |
48.0 |
56.0 |
59.0 |
63.0 |
54.1 |
| Minimum Temperature at noon |
76.0 |
76.0 |
74.0 |
68.0 |
61.0 |
57.0 |
54.0 |
62.0 |
56.0 |
55.0 |
62.0 |
70.0 |
65.1 |
| Minimum Temperature at 4h. 30m. p.m. |
72.0 |
73.0 |
68.0 |
67.0 |
60.0 |
55.0 |
52.0 |
56.0 |
57.0 |
62.0 |
63.0 |
67.0 |
62.0 |
| Mean Temperature at 7h. a.m. |
71.7 |
64.8 |
67.8 |
62.3 |
56.9 |
55.2 |
51.1 |
51.8 |
56.8 |
60.1 |
64.5 |
70.8 |
61.1 |
| Mean Temperature at noon |
85.5 |
87.2 |
84.4 |
76.3 |
68.7 |
65.0 |
62.3 |
67.5 |
66.3 |
70.5 |
75.8 |
83.6 |
74.4 |
| Mean Temperature at 4h. 30m. p.m. |
81.8 |
82.6 |
77.6 |
72.6 |
65.5 |
59.8 |
58.9 |
64.6 |
63.6 |
66.0 |
70.1 |
77.2 |
70.0 |
| Mean daily Temperature |
79.6 |
78.2 |
76.2 |
70.4 |
63.7 |
60.0 |
57.4 |
61.3 |
62.0 |
65.5 |
70.1 |
77.2 |
68.5 |
| Minimum Temperature at night |
56.0 |
59.0 |
54.0 |
46.0 |
44.0 |
46.0 |
42.0 |
40.0 |
47.0 |
50.0 |
52.0 |
55.0 |
49.2 |
| Approximate mean day and night Temperature |
73.5 |
71.9 |
70.3 |
60.5 |
57.8 |
58.9 |
53.5 |
55.0 |
58.0 |
60.0 |
67.1 |
73.9 |
63.4 |
| HYGROMETER (DRY AND WET BULB THERMOMETERS.) |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum Temperature of the Dew-point at 7h. a.m. |
70.9 |
71.3 |
67.1 |
74.0 |
66.0 |
60.0 |
58.0 |
55.1 |
60.3 |
61.5 |
64.0 |
72.3 |
65.0 |
| Maximum Temperature of the Dew-point at noon |
73.8 |
74.9 |
75.6 |
71.2 |
66.1 |
62.9 |
59.3 |
62.6 |
67.1 |
68.1 |
69.4 |
78.0 |
69.1 |
| Maximum Temperature of the Dew-point at 4h. 30m. p.m. |
73.3 |
74.9 |
77.1 |
72.0 |
72.9 |
63.4 |
56.1 |
65.0 |
63.2 |
68.0 |
71.4 |
79.1 |
69.7 |
| Minimum Temperature of the Dew Point at 7h. a.m. |
52.8 |
56.2 |
50.4 |
49.5 |
45.9 |
47.9 |
37.4 |
37.4 |
45.9 |
50.4 |
49.8 |
55.6 |
48.3 |
| Minimum Temperature of the Dew Point at noon |
61.0 |
64.4 |
60.2 |
56.7 |
52.3 |
51.4 |
44.4 |
50.8 |
48.2 |
55.1 |
58.0 |
60.2 |
55.2 |
| Minimum Temperature of the Dew Point at 4h. 30m. p.m. |
60.1 |
62.3 |
59.4 |
55.8 |
54.3 |
47.2 |
44.0 |
51.5 |
51.5 |
51.5 |
56.7 |
59.4 |
54.5 |
| Mean Temperature of the Dew Point at 7h. a.m. |
55.4 |
62.2 |
60.2 |
59.4 |
54.7 |
53.2 |
46.6 |
47.8 |
53.5 |
56.0 |
58.0 |
63.1 |
55.9 |
| Mean Temperature of the Dew Point at noon |
67.6 |
69.1 |
67.6 |
65.2 |
60.0 |
57.4 |
52.9 |
56.2 |
57.8 |
61.0 |
62.9 |
69.7 |
62.3 |
| Mean Temperature of the Dew Point at 4h. 30m. p.m. |
64.3 |
48.7 |
66.9 |
64.2 |
59.7 |
54.6 |
51.2 |
55.4 |
55.3 |
58.9 |
62.1 |
67.8 |
60.8 |
| Mean daily Temperature of the Dew Point |
62.4 |
66.7 |
64.9 |
62.9 |
58.1 |
55.0 |
50.2 |
53.1 |
55.5 |
58.6 |
61.0 |
66.9 |
59.6 |
| HUMIDITY. |
|
|
|
|
|
|
|
|
|
|
|
|
|
| Maximum degree of Humidity (complete saturation being equal to 1.00) |
0.89 |
1.00 |
0.94 |
1.00 |
1.00 |
1.00 |
1.00 |
0.93 |
1.00 |
1.00 |
1.00 |
0.94 |
0.96 |
| Minimum degree of Humidity (complete saturation being equal to 1.00) |
0.35 |
0.41 |
0.27 |
0.43 |
0.53 |
0.48 |
0.58 |
0.52 |
0.53 |
0.65 |
0.47 |
0.51 |
0.48 |
| Mean degree of Humidity (complete saturation being equal to 1.00) |
0.62 |
0.64 |
0.69 |
0.78 |
0.83 |
0.85 |
0.77 |
0.77 |
0.79 |
0.79 |
0.74 |
0.71 |
0.75 |