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Rainfall is a highly variable natural occurrence which cannot be relied on or be predicted from year to year or season to season.
The following chart provides a handy rainfall guide for a number of Australian cities.
More information can be found on the Australian Bureau of Meteorology website: www.bom.gov.au.
Australian Average Rainfall (mm) |
| CITY |
JAN |
FEB |
MAR |
APR |
MAY |
JUN |
JUL |
AUG |
SEP |
OCT |
NOV |
DEC |
TOTAL |
| Melbourne |
48.2 |
47.0 |
50.6 |
58.2 |
56.6 |
49.8 |
47.9 |
50.3 |
58.7 |
67.4 |
59.3 |
59.1 |
653.2 |
| Albury |
52.8 |
34.6 |
40.8 |
47.5 |
62.9 |
71.9 |
86.7 |
88.5 |
71.4 |
72.5 |
53.2 |
53.9 |
736.7 |
| Bendigo |
33.0 |
32.2 |
36.0 |
41.4 |
54.8 |
61.0 |
56.4 |
58.6 |
54.2 |
52.4 |
37.4 |
33.1 |
550.5 |
| Canberra |
59.8 |
51.2 |
55.6 |
49.3 |
47.5 |
37.9 |
52.4 |
47.6 |
65.2 |
61.9 |
58.7 |
46.0 |
633.1 |
| Sydney |
103.3 |
117.4 |
131.2 |
127.2 |
123.3 |
128.1 |
98.1 |
81.5 |
68.7 |
76.9 |
83.1 |
78.1 |
1217.0 |
| Newcastle |
91.4 |
105.6 |
121.9 |
115.9 |
118.6 |
117.8 |
97.2 |
76.2 |
73.7 |
74.3 |
69.5 |
82.4 |
1144.6 |
| Wollongong |
106.8 |
108.7 |
118.5 |
131.2 |
115.8 |
109.0 |
91.0 |
61.4 |
66.7 |
68.1 |
71.9 |
86.5 |
1135.6 |
| Brisbane |
159.6 |
158.3 |
140.7 |
92.5 |
73.7 |
67.8 |
56.5 |
45.9 |
45.7 |
75.4 |
97.0 |
133.3 |
1146.4 |
| Cairns |
386.6 |
453.0 |
420.3 |
197.7 |
93.2 |
46.5 |
28.7 |
27.9 |
34.6 |
39.6 |
94.4 |
180.4 |
2002.8 |
| Townsville |
262.8 |
297.5 |
187.8 |
67.6 |
34.6 |
19.6 |
13.0 |
16.5 |
10.1 |
25.6 |
59.3 |
127.0 |
1121.5 |
| Gold Coast |
175.3 |
190.0 |
202.0 |
135.8 |
131.5 |
93.0 |
74.6 |
55.8 |
57.9 |
86.7 |
103.8 |
132.1 |
1438.6 |
| Adelaide |
19.2 |
13.7 |
26.2 |
38.7 |
62.6 |
83.1 |
77.8 |
68.1 |
63.6 |
48.5 |
29.6 |
26.8 |
558.1 |
| Mt Gambier |
26.5 |
25.6 |
35.8 |
54.7 |
71.8 |
84.7 |
99.6 |
93.5 |
72.8 |
62.6 |
46.5 |
37.4 |
711.5 |
| Port Lincoln |
13.2 |
14.8 |
20.0 |
36.4 |
57.4 |
74.6 |
78.9 |
69.0 |
49.7 |
35.9 |
21.9 |
19.1 |
490.9 |
| Perth |
8.6 |
13.3 |
19.3 |
45.5 |
122.7 |
182.4 |
172.9 |
134.6 |
79.9 |
54.5 |
21.7 |
13.9 |
869.4 |
| Albany |
23.7 |
23.1 |
38.3 |
67.9 |
119.6 |
132.5 |
144.8 |
127.4 |
102.0 |
80.4 |
43.4 |
29.6 |
932.6 |
| Kalgoorlie |
22.8 |
31.5 |
23.6 |
22.1 |
27.8 |
29.6 |
25.4 |
21.7 |
14.5 |
15.1 |
18.2 |
16.1 |
268.4 |
| Broome |
173.0 |
185.0 |
99.6 |
26.6 |
28.7 |
18.2 |
6.3 |
1.7 |
1.5 |
1.4 |
8.1 |
49.1 |
599.2 |
| Alice Springs |
38.0 |
44.1 |
32.3 |
17.3 |
20.0 |
14.5 |
14.0 |
9.8 |
8.6 |
21.6 |
27.5 |
38.1 |
285.7 |
| Katherine |
271.6 |
256.1 |
188.7 |
37.7 |
6.1 |
0.3 |
1.4 |
1.0 |
7.7 |
38.0 |
87.0 |
203.6 |
1099.2 |
| Hobart |
48.0 |
39.8 |
45.7 |
51.8 |
47.0 |
54.6 |
52.8 |
53.0 |
52.4 |
62.6 |
54.5 |
57.2 |
619.5 |
| Devonport |
44.8 |
37.8 |
48.1 |
62.5 |
77.8 |
82.9 |
99.9 |
90.9 |
76.3 |
67.0 |
57.0 |
52.5 |
797.4 |
| Launceston |
51.8 |
28.9 |
34.7 |
53.5 |
67.9 |
67.3 |
79.4 |
83.0 |
66.4 |
55.7 |
49.3 |
45.5 |
683.3 |
| Darwin |
423.3 |
361.1 |
319.3 |
98.9 |
26.5 |
2.0 |
1.4 |
5.7 |
15.4 |
70.7 |
141.8 |
247.9 |
1713.9 |
Averaged over period of 1908 – 2004
Information supplied by the Australian Bureau of Meteorology www.bom.gov.au
There are obvious restrictions on storing an entire year’s supply of rainwater and using it in summer months. Problems arise because of the application of rainwater tanks. Rainwater tanks used for watering gardens in urban locations will result in prohibitively large storage volume and waste. During winter the garden is watered naturally and with a full tank most of the water collected goes down the storm water drain. In summer, with a greater demand for water on the garden the average domestic rain water tank will run out of water fairly quickly with little or no chance of replenishment.
Therefore, the homeowner should rely on water conservation techniques rather than large tanks to maintain the garden year round. Many examples of water efficient gardening can be found at city botanical gardens. In addition, planning and layout of new gardens are very important.
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