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Monthly climate in Northam, Australia

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Northam features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 11 °C (53 °F) and 25 °C (77 °F) through the year, but rarely can drop to 0 °C (33 °F) or can rise to as high as 43 °C (109 °F). The average annual precipitation amounts to about 371 mm (14.6 inches) and receives 49 rainy days on the 1 mm (0.04 inches) threshold annually. Northam enjoys an average of 3657 hours of sunshine throughout the year, and daylight varies from 10 hours 6 minutes to 14 hours 9 minutes per day.

Monthly average temperatures in Northam, Australia

The warmest months in Northam are January, February and December, with daily mean temperatures ranging from 24 to 25 °C (75 - 77 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 11 to 12 °C (53 - 54 °F) throughout the day. On average each year, Northam experiences 151 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 Northam. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum43°C
(109°F)		41°C
(106°F)		39°C
(103°F)		37°C
(98°F)		30°C
(87°F)		25°C
(78°F)		23°C
(74°F)		27°C
(80°F)		30°C
(86°F)		35°C
(95°F)		40°C
(105°F)		42°C
(108°F)
Mean maximum40°C
(105°F)		39°C
(102°F)		37°C
(98°F)		33°C
(92°F)		28°C
(83°F)		22°C
(71°F)		21°C
(70°F)		24°C
(75°F)		28°C
(82°F)		33°C
(91°F)		37°C
(99°F)		40°C
(103°F)
Average high32°C
(90°F)		31°C
(88°F)		29°C
(84°F)		25°C
(78°F)		21°C
(70°F)		18°C
(65°F)		17°C
(62°F)		17°C
(62°F)		20°C
(68°F)		23°C
(74°F)		27°C
(82°F)		32°C
(89°F)
Daily mean25°C
(77°F)		24°C
(76°F)		22°C
(73°F)		19°C
(66°F)		14°C
(58°F)		12°C
(54°F)		12°C
(53°F)		11°C
(53°F)		13°C
(56°F)		17°C
(62°F)		20°C
(68°F)		24°C
(75°F)
Average low17°C
(63°F)		18°C
(64°F)		17°C
(62°F)		13°C
(56°F)		9°C
(49°F)		8°C
(46°F)		7°C
(46°F)		6°C
(44°F)		7°C
(46°F)		10°C
(50°F)		13°C
(55°F)		16°C
(61°F)
Mean minimum12°C
(53°F)		12°C
(53°F)		10°C
(50°F)		7°C
(45°F)		4°C
(40°F)		3°C
(38°F)		3°C
(37°F)		2°C
(35°F)		2°C
(36°F)		4°C
(40°F)		7°C
(46°F)		9°C
(49°F)
Minimum10°C
(50°F)		8°C
(47°F)		7°C
(46°F)		4°C
(40°F)		1°C
(35°F)		0°C
(33°F)		2°C
(35°F)		1°C
(34°F)		1°C
(34°F)		3°C
(37°F)		6°C
(43°F)		6°C
(43°F)

Compare climate in Northam with other places

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

Monthly average precipitation in Northam, Australia

Northam usually has the most precipitation in June, July and August, with an average of 8 rainy days and 55 mm (2.2 inches) of precipitation per month. The driest months in Northam are April, November and December. On average, 10 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Northam. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)22 (0.9)49 (1.9)27 (1.1)14 (0.5)31 (1.2)52 (2.0)58 (2.3)55 (2.2)22 (0.9)24 (1.0)13 (0.5)4 (0.2)
Average precipitation days (≥ 1 mm)1431471084421

Monthly sunshine hours in Northam, Australia

The sunniest months in Northam are October, November and December, when the sun shines an average of 11 hours 31 minutes a day. Least sunny months in Northam: May, June and July receive an average of 8 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Northam. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours306310321287278254266279292328350380
Mean daily daylight hours13h 56m13h 11m12h 14m11h 16m10h 29m10h 6m10h 17m10h 59m11h 53m12h 51m13h 43m14h 9m

Solar UV radiation in Northam, Australia

Northam experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 14 - 15, 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 Northam UV Index data.

Average daily maximum UV levels by month for Northam. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151512964569111414