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Monthly climate in Onslow, Western Australia, Australia

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Onslow features a hot desert climate (BWh).Temperatures typically range between 20 °C (68 °F) and 31 °C (88 °F) through the year, but rarely can drop to 9 °C (48 °F) or can rise to as high as 47 °C (116 °F).The average annual precipitation amounts to about 149 mm (5.9 inches) and receives 12 rainy days on the 1 mm (0.04 inches) threshold annually.Onslow enjoys an average of 3753 hours of sunshine throughout the year, and daylight varies from 10 hours 49 minutes to 13 hours 24 minutes per day.

Monthly average temperatures in Onslow, Western Australia, Australia §

The warmest months in Onslow are January, February and March, with daily mean temperatures ranging from 30 to 31 °C (87 - 88 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 20 to 21 °C (68 - 70 °F) throughout the day. On average each year, Onslow experiences 304 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 Onslow, Western Australia, 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 47°C
(116°F)		 44°C
(111°F)		 45°C
(113°F)		 41°C
(105°F)		 36°C
(97°F)		 32°C
(89°F)		 32°C
(90°F)		 35°C
(95°F)		 38°C
(100°F)		 40°C
(105°F)		 41°C
(107°F)		 47°C
(116°F)
Mean maximum 43°C
(110°F)		 41°C
(106°F)		 42°C
(108°F)		 39°C
(102°F)		 34°C
(94°F)		 28°C
(82°F)		 30°C
(86°F)		 32°C
(89°F)		 36°C
(97°F)		 37°C
(100°F)		 40°C
(104°F)		 44°C
(112°F)
Average high 36°C
(97°F)		 35°C
(95°F)		 36°C
(97°F)		 34°C
(93°F)		 30°C
(86°F)		 26°C
(78°F)		 26°C
(80°F)		 27°C
(81°F)		 30°C
(86°F)		 31°C
(89°F)		 33°C
(92°F)		 36°C
(97°F)
Daily mean 31°C
(88°F)		 30°C
(87°F)		 31°C
(88°F)		 29°C
(84°F)		 24°C
(76°F)		 20°C
(69°F)		 20°C
(68°F)		 21°C
(70°F)		 24°C
(75°F)		 25°C
(78°F)		 27°C
(81°F)		 30°C
(86°F)
Average low 27°C
(80°F)		 26°C
(80°F)		 27°C
(80°F)		 24°C
(75°F)		 19°C
(66°F)		 16°C
(61°F)		 15°C
(59°F)		 15°C
(59°F)		 17°C
(63°F)		 19°C
(66°F)		 21°C
(70°F)		 24°C
(76°F)
Mean minimum 23°C
(74°F)		 22°C
(73°F)		 24°C
(75°F)		 20°C
(68°F)		 14°C
(58°F)		 11°C
(53°F)		 11°C
(52°F)		 11°C
(52°F)		 14°C
(57°F)		 15°C
(60°F)		 18°C
(64°F)		 21°C
(70°F)
Minimum 22°C
(72°F)		 21°C
(70°F)		 22°C
(72°F)		 18°C
(64°F)		 12°C
(54°F)		 9°C
(48°F)		 9°C
(49°F)		 10°C
(50°F)		 12°C
(54°F)		 13°C
(56°F)		 17°C
(62°F)		 19°C
(67°F)

Compare climate in Onslow with other places

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

Monthly average precipitation in Onslow, Western Australia, Australia §

Onslow usually has the most precipitation in February, March and June, with an average of 2 rainy days and 33 mm (1.3 inches) of precipitation per month.The driest months in Onslow are September, October and December. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Onslow, Western Australia, 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) 10 (0.4) 25 (1.0) 37 (1.5) 15 (0.6) 18 (0.7) 36 (1.4) 3 (0.1) 2 (0.1) 0 (0.0) 0 (0.0) 2 (0.1) 1 (0.0)
Average precipitation days (≥ 1 mm) 2 3 2 1 1 3 0 0 0 0 0 0

Monthly sunshine hours in Onslow, Western Australia, Australia §

The sunniest months in Onslow are October, November and December, when the sun shines an average of 11 hours 23 minutes a day.Least sunny months in Onslow: January, May and June receive an average of 9 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Onslow, Western Australia, 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 286 306 325 299 296 271 298 308 313 342 346 359
Mean daily daylight hours 13h 16m 12h 47m 12h 11m 11h 34m 11h 3m 10h 49m 10h 56m 11h 22m 11h 57m 12h 35m 13h 7m 13h 24m

Solar UV radiation in Onslow, Western Australia, Australia §

Onslow experiences the highest level of ultraviolet (UV) radiation in January, November and December, when the maximum UV index can reach values of 15 - 15, which corresponds to the Extreme category of sun exposure.May, June and July are in the High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Onslow UV Index data.

Average daily maximum UV levels by month for Onslow, Western Australia, Australia.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 15 15 13 11 8 7 8 10 13 14 15 15