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The climate of Perth: when to go to Perth

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Perth has a mild Mediterranean climate that can be divided into canonical four seasons, the summers, between December and March, are hot and dry, the winters, between June and September, are mild and rainy, spring and autumn are mild and relatively wet but with several days of good weather.

Rainfall is concentrated in the months between May and September, the average annual rainfall is between 700 mm and 800 mm, the wettest months are those of June and July. Perth has 109 days of rain per year and more than 3,200 hours of sunshine annually. Between June and September there are on average between 17 and 15 days of rain per month, while between December and March there is an average of only 2-3 days of rain per month.

The temperatures vary quite a bit on a seasonal basis, the average maximum temperatures vary between 32°C in February and 18°C in July and August, while the average minimum temperatures vary between 17°C in January and February and 8°C in July and August.

The sea water temperature varies between 22°C in the summer months and 19°C during the winter months.


Thanks to the mild climate all year is good to visit Perth, of course, the best months are those in which rains less, that is, the months between October and April, which are the warmest and sunniest months.


PERTH (20 meters)
Month Average low (°C) Average high (°C) Precip. (mm) Precip. days
January 18,2 31,3 15,4  2,4
February 18,4 31,7 8,8  2,1
March 16,6 29,6 20,5  4,1
April 13,8 25,9 36,5  6,7
May 10,5 22,3 90,2  11,1
June 8,6 19,4 126,7  15,2
July 7,7 18,4 144,7  16,9
August 8,3 19,1 122,4  15,7
September 9,6 20,4 88,0  15,3
October 11,5 23,4 38,6  8,7
November 14,3 26,6 23,7  6,3
December 16,4 29,1 9,9  3,9
YEAR 12,8 24,8 730,5  108,4

Month Sea Water Temperature °C
January 21
February 22
March 22
April 22
May 22
June 20
July 20
August 19
September 19
October 19
November 20
December 20

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