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Monthly climate in Perth, Australia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Perth features a oceanic climate (Cfb). Temperatures typically range between 6 °C (44 °F) and 17 °C (64 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 815 mm (32.1 inches) and receives 110 rainy days on the 1 mm (0.04 inches) threshold annually. Perth enjoys an average of 3214 hours of sunshine throughout the year, and daylight varies from 9 hours 11 minutes to 15 hours 6 minutes per day.

Monthly average temperatures in Perth, Australia

The warmest months in Perth are January, February and December, with daily mean temperatures ranging from 15 to 17 °C (60 - 64 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 6 to 7 °C (44 - 45 °F) throughout the day. On average each year, Perth experiences 17 days above 25 °C (77.0 °F) and 22 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Perth. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(91°F)		33°C
(92°F)		31°C
(88°F)		25°C
(77°F)		20°C
(68°F)		15°C
(60°F)		14°C
(58°F)		15°C
(60°F)		21°C
(69°F)		25°C
(78°F)		28°C
(83°F)		33°C
(92°F)
Mean maximum31°C
(87°F)		28°C
(82°F)		26°C
(80°F)		22°C
(72°F)		18°C
(65°F)		14°C
(57°F)		14°C
(57°F)		15°C
(59°F)		19°C
(66°F)		22°C
(72°F)		25°C
(78°F)		29°C
(85°F)
Average high23°C
(74°F)		21°C
(70°F)		21°C
(69°F)		17°C
(63°F)		14°C
(57°F)		11°C
(53°F)		11°C
(52°F)		11°C
(53°F)		13°C
(56°F)		16°C
(61°F)		18°C
(66°F)		21°C
(70°F)
Daily mean17°C
(64°F)		16°C
(61°F)		15°C
(59°F)		12°C
(53°F)		9°C
(49°F)		7°C
(45°F)		6°C
(44°F)		7°C
(45°F)		8°C
(47°F)		11°C
(52°F)		13°C
(56°F)		15°C
(60°F)
Average low12°C
(53°F)		11°C
(51°F)		10°C
(50°F)		7°C
(45°F)		5°C
(41°F)		3°C
(38°F)		3°C
(37°F)		3°C
(37°F)		3°C
(39°F)		6°C
(43°F)		8°C
(46°F)		10°C
(50°F)
Mean minimum6°C
(43°F)		4°C
(40°F)		4°C
(40°F)		1°C
(34°F)		-1°C
(31°F)		-1°C
(30°F)		-3°C
(28°F)		-2°C
(28°F)		-2°C
(28°F)		1°C
(34°F)		1°C
(34°F)		5°C
(41°F)
Minimum4°C
(40°F)		3°C
(37°F)		1°C
(35°F)		-2°C
(29°F)		-2°C
(30°F)		-4°C
(25°F)		-4°C
(26°F)		-3°C
(27°F)		-3°C
(26°F)		-1°C
(31°F)		0°C
(32°F)		3°C
(37°F)

Compare climate in Perth with other places

Compare temperature, precipitation, sunshine, UV index in Perth, Australia with other places around the world.

Monthly average precipitation in Perth, Australia

Perth usually has the most precipitation in May, July and October, with an average of 11 rainy days and 84 mm (3.3 inches) of precipitation per month. The driest months in Perth are January, June and November. On average, 54 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Perth. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)50 (2.0)68 (2.7)68 (2.7)58 (2.3)77 (3.0)55 (2.2)89 (3.5)70 (2.8)68 (2.7)85 (3.4)56 (2.2)71 (2.8)
Average precipitation days (≥ 1 mm)5897991212111297

Monthly sunshine hours in Perth, Australia

The sunniest months in Perth are October, November and December, when the sun shines an average of 10 hours 33 minutes a day. Least sunny months in Perth: May, June and July receive an average of 6 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Perth. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours296296286249217190210235260298318354
Mean daily daylight hours14h 46m13h 41m12h 19m10h 56m9h 46m9h 11m9h 29m10h 29m11h 48m13h 12m14h 27m15h 6m

Solar UV radiation in Perth, Australia

Perth experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 11 - 13, which corresponds to the Extreme category of sun exposure. May, June and July are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Perth UV Index data.

Average daily maximum UV levels by month for Perth. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)13111063224681113