Monthly climate in Perth, Australia

Last updated: June 28, 2022

Under the Köppen–Geiger climate classification Perth features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 14 °C (58 °F) and 24 °C (75 °F) through the year, but rarely can drop to 7 °C (44 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 632 mm (24.9 inches) and receives 76 rainy days on the 1 mm (0.04 inches) threshold annually. Perth enjoys an average of 3695 hours of sunshine throughout the year, and daylight varies from 10 hours 4 minutes to 14 hours 11 minutes per day.

Monthly average temperatures in Perth, Australia §

The warmest months in Perth are January, February and Mart, with daily mean temperatures ranging from 23 to 24 °C (73 - 75 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 14 to 15 °C (58 - 59 °F) throughout the day. On average each year, Perth experiences 109 days above 25 °C (77.0 °F) and 0 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, Australia. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 37°C
(99°F)
38°C
(101°F)
35°C
(96°F)
34°C
(94°F)
29°C
(84°F)
24°C
(75°F)
23°C
(73°F)
26°C
(78°F)
28°C
(83°F)
32°C
(90°F)
35°C
(96°F)
40°C
(104°F)
Mean maximum 36°C
(97°F)
35°C
(96°F)
34°C
(93°F)
31°C
(88°F)
26°C
(79°F)
22°C
(71°F)
21°C
(70°F)
23°C
(74°F)
26°C
(79°F)
29°C
(85°F)
32°C
(90°F)
36°C
(98°F)
Average high 28°C
(83°F)
28°C
(83°F)
27°C
(81°F)
24°C
(76°F)
21°C
(70°F)
19°C
(66°F)
17°C
(64°F)
17°C
(64°F)
19°C
(66°F)
21°C
(70°F)
24°C
(75°F)
27°C
(82°F)
Daily mean 24°C
(75°F)
24°C
(75°F)
23°C
(73°F)
20°C
(68°F)
17°C
(62°F)
15°C
(59°F)
15°C
(58°F)
14°C
(58°F)
15°C
(60°F)
17°C
(63°F)
20°C
(68°F)
23°C
(73°F)
Average low 19°C
(67°F)
20°C
(67°F)
19°C
(67°F)
16°C
(62°F)
13°C
(56°F)
12°C
(54°F)
12°C
(54°F)
11°C
(52°F)
12°C
(54°F)
13°C
(56°F)
15°C
(60°F)
18°C
(65°F)
Mean minimum 14°C
(58°F)
15°C
(59°F)
14°C
(57°F)
12°C
(53°F)
9°C
(49°F)
9°C
(48°F)
9°C
(48°F)
8°C
(47°F)
8°C
(47°F)
9°C
(49°F)
12°C
(53°F)
13°C
(56°F)
Minimum 13°C
(56°F)
14°C
(57°F)
11°C
(53°F)
9°C
(49°F)
7°C
(45°F)
8°C
(46°F)
8°C
(47°F)
7°C
(45°F)
7°C
(44°F)
9°C
(48°F)
10°C
(50°F)
10°C
(51°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 June, July and August, with an average of 12 rainy days and 109 mm (4.3 inches) of precipitation per month. The driest months in Perth are Mart, April and December. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Perth, Australia. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 31 (1.2) 58 (2.3) 21 (0.8) 21 (0.8) 58 (2.3) 107 (4.2) 115 (4.5) 103 (4.1) 42 (1.6) 41 (1.6) 26 (1.0) 8 (0.3)
Average precipitation days (≥ 1 mm) 0 4 4 3 8 11 16 11 7 7 3 2

Monthly sunshine hours in Perth, Australia §

The sunniest months in Perth are October, November and December, when the sun shines an average of 11 hours 34 minutes a day. Least sunny months in Perth: May, June and July receive an average of 8 hours 50 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Perth, Australia. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 308 315 323 289 279 261 273 285 297 329 352 384
Mean daily daylight hours 13h 57m 13h 12m 12h 14m 11h 16m 10h 28m 10h 4m 10h 16m 10h 58m 11h 53m 12h 52m 13h 44m 14h 11m

Solar UV radiation in Perth, Australia §

Perth experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 14 - 16, which corresponds to the Extreme category of sun exposure. May, June and July are in the Moderate / High exposure category. In these months, the maximum values of the UV index do not exceed 6. For more detailed information, check out our hourly Perth UV Index data.

Average daily maximum UV levels by month for Perth, Australia. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 14 16 13 8 6 4 5 6 8 11 13 15