Most Monthly Precipitation in Perth History

This is a list of the largest monthly precipitation totals ever recorded in Perth, Western Australia history from 1877–2024.

What Was the Wettest Month in Perth History?

According to NOAA records, the most precipitation that Perth, Western Australia has ever received in a single month is 44.7 cm which occurred in July 1958.

Perth Most Rain in One Month

Rank	Precipitation	Month
1	44.7 cm	July 1958
2	42.4 cm	June 1945
3	34.0 cm	August 1955
4	32.5 cm	June 1923
5	31.8 cm	June 1964
6	31.2 cm	July 1926
7	31.0 cm	August 1928
8	30.8 cm	June 1890
9	30.2 cm	July 1928
10	30.1 cm	June 1957
11	30.0 cm	June 1920
12	30.0 cm	June 1883
13	29.2 cm	May 1929
14	29.0 cm	June 1934
15	28.8 cm	June 1930
16	28.7 cm	July 1917
17	28.4 cm	June 1900
18	28.4 cm	July 1939
19	28.3 cm	June 1939
20	27.7 cm	July 1902