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Monthly climate in Karratha, Australia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Karratha features a hot desert climate (BWh). Temperatures typically range between 21 °C (71 °F) and 30 °C (87 °F) through the year, but rarely can drop to 13 °C (55 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 330 mm (13.0 inches) and receives 18 rainy days on the 1 mm (0.04 inches) threshold annually. Karratha enjoys an average of 3721 hours of sunshine throughout the year, and daylight varies from 10 hours 52 minutes to 13 hours 21 minutes per day.

Monthly average temperatures in Karratha, Australia

The warmest months in Karratha are January, March and December, with daily mean temperatures ranging from 30 to 30 °C (86 - 87 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 21 to 22 °C (71 - 71 °F) throughout the day. On average each year, Karratha experiences 275 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 Karratha. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum41°C
(106°F)		38°C
(101°F)		39°C
(102°F)		36°C
(96°F)		32°C
(89°F)		28°C
(82°F)		27°C
(82°F)		33°C
(91°F)		32°C
(90°F)		35°C
(95°F)		36°C
(96°F)		39°C
(102°F)
Mean maximum37°C
(100°F)		36°C
(97°F)		37°C
(99°F)		34°C
(94°F)		31°C
(88°F)		25°C
(78°F)		27°C
(80°F)		29°C
(84°F)		31°C
(87°F)		33°C
(92°F)		35°C
(95°F)		37°C
(98°F)
Average high33°C
(91°F)		32°C
(89°F)		33°C
(91°F)		32°C
(89°F)		28°C
(82°F)		24°C
(76°F)		24°C
(76°F)		25°C
(77°F)		28°C
(82°F)		29°C
(85°F)		31°C
(87°F)		32°C
(91°F)
Daily mean30°C
(87°F)		29°C
(85°F)		30°C
(87°F)		29°C
(84°F)		25°C
(77°F)		22°C
(71°F)		21°C
(71°F)		22°C
(71°F)		24°C
(76°F)		26°C
(79°F)		28°C
(82°F)		30°C
(86°F)
Average low28°C
(83°F)		28°C
(82°F)		28°C
(83°F)		26°C
(79°F)		22°C
(72°F)		19°C
(66°F)		18°C
(65°F)		18°C
(65°F)		21°C
(70°F)		23°C
(73°F)		25°C
(77°F)		27°C
(81°F)
Mean minimum26°C
(79°F)		25°C
(78°F)		26°C
(79°F)		23°C
(74°F)		18°C
(65°F)		15°C
(60°F)		15°C
(60°F)		15°C
(60°F)		18°C
(65°F)		20°C
(68°F)		21°C
(71°F)		24°C
(76°F)
Minimum25°C
(77°F)		24°C
(76°F)		24°C
(76°F)		22°C
(72°F)		17°C
(62°F)		13°C
(55°F)		14°C
(58°F)		14°C
(57°F)		16°C
(62°F)		18°C
(65°F)		20°C
(69°F)		21°C
(70°F)

Compare climate in Karratha with other places

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

Monthly average precipitation in Karratha, Australia

Karratha usually has the most precipitation in January, February and March, with an average of 4 rainy days and 79 mm (3.1 inches) of precipitation per month. The driest months in Karratha are September, October and November. On average, 0 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Karratha. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)42 (1.7)97 (3.8)99 (3.9)15 (0.6)18 (0.7)22 (0.8)5 (0.2)1 (0.0)0 (0.0)0 (0.0)0 (0.0)31 (1.2)
Average precipitation days (≥ 1 mm)444212000001

Monthly sunshine hours in Karratha, Australia

The sunniest months in Karratha are October, November and December, when the sun shines an average of 11 hours 18 minutes a day. Least sunny months in Karratha: January, May and June receive an average of 9 hours 14 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Karratha. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours279299318296296274297308311342342354
Mean daily daylight hours13h 13m12h 46m12h 10m11h 35m11h 6m10h 52m10h 59m11h 24m11h 58m12h 33m13h 5m13h 21m

Solar UV radiation in Karratha, Australia

Karratha 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 9. For more detailed information, check out our hourly Karratha UV Index data.

Average daily maximum UV levels by month for Karratha. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151514119781113141515