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Monthly climate in Derby, Western Australia, Australia

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Derby features a hot semi-arid climate (BSh).Temperatures typically range between 23 °C (74 °F) and 31 °C (88 °F) through the year, but rarely can drop to 10 °C (51 °F) or can rise to as high as 43 °C (109 °F).The average annual precipitation amounts to about 737 mm (29.0 inches) and receives 44 rainy days on the 1 mm (0.04 inches) threshold annually.Derby enjoys an average of 3609 hours of sunshine throughout the year, and daylight varies from 11 hours 5 minutes to 13 hours 7 minutes per day.

Monthly average temperatures in Derby, Western Australia, Australia §

The warmest months in Derby are March, November and December, with daily mean temperatures ranging from 30 to 31 °C (86 - 88 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 23 to 24 °C (74 - 76 °F) throughout the day. On average each year, Derby experiences 328 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 Derby, 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 40°C
(104°F)		 38°C
(100°F)		 39°C
(102°F)		 39°C
(102°F)		 37°C
(98°F)		 34°C
(93°F)		 34°C
(94°F)		 37°C
(99°F)		 39°C
(102°F)		 41°C
(106°F)		 41°C
(107°F)		 43°C
(109°F)
Mean maximum 38°C
(100°F)		 36°C
(98°F)		 38°C
(101°F)		 38°C
(101°F)		 36°C
(96°F)		 31°C
(89°F)		 33°C
(91°F)		 35°C
(95°F)		 38°C
(100°F)		 39°C
(103°F)		 39°C
(103°F)		 40°C
(104°F)
Average high 33°C
(92°F)		 33°C
(92°F)		 34°C
(94°F)		 35°C
(96°F)		 32°C
(91°F)		 30°C
(86°F)		 30°C
(87°F)		 31°C
(88°F)		 34°C
(93°F)		 35°C
(95°F)		 36°C
(96°F)		 35°C
(96°F)
Daily mean 30°C
(86°F)		 30°C
(85°F)		 30°C
(86°F)		 30°C
(86°F)		 26°C
(80°F)		 24°C
(75°F)		 23°C
(74°F)		 24°C
(76°F)		 27°C
(81°F)		 30°C
(85°F)		 31°C
(88°F)		 31°C
(88°F)
Average low 27°C
(81°F)		 27°C
(81°F)		 27°C
(80°F)		 25°C
(77°F)		 21°C
(69°F)		 18°C
(65°F)		 17°C
(63°F)		 17°C
(64°F)		 21°C
(69°F)		 24°C
(76°F)		 27°C
(80°F)		 28°C
(82°F)
Mean minimum 25°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)		 21°C
(70°F)		 16°C
(61°F)		 15°C
(59°F)		 14°C
(57°F)		 13°C
(55°F)		 16°C
(61°F)		 21°C
(71°F)		 24°C
(75°F)		 25°C
(77°F)
Minimum 24°C
(76°F)		 24°C
(75°F)		 22°C
(71°F)		 18°C
(65°F)		 15°C
(58°F)		 13°C
(56°F)		 12°C
(54°F)		 10°C
(51°F)		 14°C
(58°F)		 19°C
(67°F)		 22°C
(72°F)		 23°C
(74°F)

Compare climate in Derby with other places

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

Monthly average precipitation in Derby, Western Australia, Australia §

Derby usually has the most precipitation in January, February and December, with an average of 10 rainy days and 186 mm (7.3 inches) of precipitation per month.The driest months in Derby are July, August and September. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Derby, 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) 227 (8.9) 187 (7.3) 133 (5.2) 12 (0.5) 24 (1.0) 1 (0.0) 0 (0.0) 0 (0.0) 0 (0.0) 1 (0.0) 8 (0.3) 146 (5.7)
Average precipitation days (≥ 1 mm) 12 11 8 3 1 0 0 0 0 0 2 7

Monthly sunshine hours in Derby, Western Australia, Australia §

The sunniest months in Derby are October, November and December, when the sun shines an average of 10 hours 41 minutes a day.Least sunny months in Derby: January, February and June receive an average of 8 hours 55 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Derby, 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 239 276 300 298 295 286 301 311 314 333 327 322
Mean daily daylight hours 13h 1m 12h 38m 12h 10m 11h 40m 11h 17m 11h 5m 11h 11m 11h 31m 11h 59m 12h 28m 12h 54m 13h 7m

Solar UV radiation in Derby, Western Australia, Australia §

Derby experiences the highest level of ultraviolet (UV) radiation in January, March and November, when the maximum UV index can reach values of 16 - 16, which corresponds to the Extreme category of sun exposure.May, June and July are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Derby UV Index data.

Average daily maximum UV levels by month for Derby, 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) 16 16 16 13 9 8 9 11 14 15 16 15