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Monthly climate in Port Chalmers, New Zealand

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Port Chalmers features a oceanic climate (Cfb). Temperatures typically range between 5 °C (42 °F) and 15 °C (60 °F) through the year, but rarely can drop to -5 °C (23 °F) or can rise to as high as 32 °C (91 °F). The average annual precipitation amounts to about 840 mm (33.1 inches) and receives 140 rainy days on the 1 mm (0.04 inches) threshold annually. Port Chalmers enjoys an average of 2818 hours of sunshine throughout the year, and daylight varies from 8 hours 41 minutes to 15 hours 38 minutes per day.

Monthly average temperatures in Port Chalmers, New Zealand

The warmest months in Port Chalmers are January, February and December, with daily mean temperatures ranging from 14 to 15 °C (58 - 60 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 5 to 7 °C (42 - 45 °F) throughout the day. On average each year, Port Chalmers experiences 8 days above 25 °C (77.0 °F) and 21 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Port Chalmers. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum31°C
(88°F)		32°C
(91°F)		29°C
(85°F)		26°C
(79°F)		20°C
(68°F)		21°C
(70°F)		16°C
(62°F)		20°C
(68°F)		22°C
(72°F)		24°C
(75°F)		27°C
(81°F)		27°C
(80°F)
Mean maximum27°C
(81°F)		28°C
(82°F)		26°C
(79°F)		22°C
(71°F)		18°C
(65°F)		16°C
(61°F)		15°C
(59°F)		18°C
(64°F)		20°C
(69°F)		22°C
(72°F)		25°C
(77°F)		25°C
(78°F)
Average high20°C
(68°F)		20°C
(68°F)		19°C
(66°F)		16°C
(61°F)		13°C
(57°F)		10°C
(51°F)		10°C
(50°F)		12°C
(53°F)		14°C
(57°F)		15°C
(59°F)		17°C
(64°F)		19°C
(66°F)
Daily mean15°C
(60°F)		15°C
(59°F)		14°C
(57°F)		11°C
(52°F)		8°C
(47°F)		6°C
(43°F)		5°C
(42°F)		7°C
(45°F)		9°C
(48°F)		10°C
(51°F)		13°C
(55°F)		14°C
(58°F)
Average low11°C
(53°F)		10°C
(51°F)		10°C
(50°F)		7°C
(45°F)		4°C
(39°F)		2°C
(36°F)		2°C
(35°F)		3°C
(37°F)		4°C
(39°F)		6°C
(43°F)		9°C
(48°F)		10°C
(51°F)
Mean minimum6°C
(44°F)		5°C
(41°F)		4°C
(39°F)		2°C
(35°F)		-1°C
(30°F)		-1°C
(31°F)		-3°C
(26°F)		-3°C
(28°F)		-1°C
(31°F)		1°C
(34°F)		3°C
(38°F)		6°C
(43°F)
Minimum5°C
(42°F)		2°C
(37°F)		3°C
(38°F)		-0°C
(31°F)		-3°C
(26°F)		-4°C
(25°F)		-5°C
(23°F)		-4°C
(25°F)		-2°C
(28°F)		-0°C
(32°F)		1°C
(34°F)		4°C
(39°F)

Compare climate in Port Chalmers with other places

Compare temperature, precipitation, sunshine, UV index in Port Chalmers, New Zealand with other places around the world.

Monthly average precipitation in Port Chalmers, New Zealand

Port Chalmers usually has the most precipitation in February, November and December, with an average of 13 rainy days and 100 mm (3.9 inches) of precipitation per month. The driest months in Port Chalmers are May, June and August. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Port Chalmers. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)96 (3.8)100 (3.9)52 (2.1)69 (2.7)45 (1.8)37 (1.4)63 (2.5)40 (1.6)57 (2.2)81 (3.2)96 (3.8)105 (4.1)
Average precipitation days (≥ 1 mm)1310101199101212141515

Monthly sunshine hours in Port Chalmers, New Zealand

The sunniest months in Port Chalmers are February, November and December, when the sun shines an average of 9 hours 54 minutes a day. Least sunny months in Port Chalmers: May, June and July receive an average of 5 hours 37 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Port Chalmers. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours253277252213187158171197239253295318
Mean daily daylight hours15h 15m13h 58m12h 21m10h 45m9h 23m8h 41m9h 2m10h 13m11h 46m13h 23m14h 51m15h 38m

Solar UV radiation in Port Chalmers, New Zealand

Port Chalmers experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 12 - 13, which corresponds to the Extreme category of sun exposure. May, June and July are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Port Chalmers UV Index data.

Average daily maximum UV levels by month for Port Chalmers. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1312953223581012