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Monthly climate in Portobello, New Zealand

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Portobello features a oceanic climate (Cfb). Temperatures typically range between 7 °C (44 °F) and 15 °C (59 °F) through the year, but rarely can drop to -1 °C (31 °F) or can rise to as high as 29 °C (84 °F). The average annual precipitation amounts to about 807 mm (31.8 inches) and receives 138 rainy days on the 1 mm (0.04 inches) threshold annually. Portobello enjoys an average of 2897 hours of sunshine throughout the year, and daylight varies from 8 hours 42 minutes to 15 hours 38 minutes per day.

Monthly average temperatures in Portobello, New Zealand

The warmest months in Portobello are January, February and December, with daily mean temperatures ranging from 14 to 15 °C (57 - 59 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 7 to 8 °C (44 - 46 °F) throughout the day. On average each year, Portobello experiences 1 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 Portobello. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum26°C
(80°F)		29°C
(84°F)		25°C
(78°F)		24°C
(75°F)		18°C
(64°F)		19°C
(66°F)		15°C
(60°F)		17°C
(64°F)		19°C
(67°F)		21°C
(70°F)		23°C
(74°F)		24°C
(76°F)
Mean maximum24°C
(75°F)		25°C
(77°F)		23°C
(74°F)		20°C
(68°F)		17°C
(62°F)		15°C
(59°F)		14°C
(57°F)		16°C
(61°F)		18°C
(64°F)		19°C
(66°F)		22°C
(71°F)		23°C
(73°F)
Average high18°C
(65°F)		18°C
(65°F)		17°C
(63°F)		15°C
(59°F)		13°C
(56°F)		10°C
(51°F)		10°C
(50°F)		11°C
(52°F)		12°C
(55°F)		13°C
(56°F)		16°C
(60°F)		17°C
(63°F)
Daily mean15°C
(59°F)		15°C
(59°F)		14°C
(57°F)		12°C
(53°F)		9°C
(49°F)		7°C
(45°F)		7°C
(44°F)		8°C
(46°F)		9°C
(48°F)		10°C
(51°F)		12°C
(55°F)		14°C
(57°F)
Average low12°C
(54°F)		12°C
(53°F)		11°C
(52°F)		9°C
(48°F)		6°C
(43°F)		5°C
(41°F)		4°C
(39°F)		5°C
(41°F)		6°C
(42°F)		7°C
(45°F)		9°C
(49°F)		11°C
(52°F)
Mean minimum8°C
(47°F)		8°C
(46°F)		7°C
(44°F)		5°C
(41°F)		2°C
(36°F)		3°C
(37°F)		0°C
(33°F)		1°C
(34°F)		2°C
(36°F)		3°C
(38°F)		5°C
(42°F)		8°C
(46°F)
Minimum7°C
(46°F)		6°C
(43°F)		5°C
(42°F)		3°C
(37°F)		1°C
(34°F)		0°C
(33°F)		-1°C
(31°F)		-0°C
(32°F)		1°C
(34°F)		2°C
(36°F)		3°C
(38°F)		6°C
(43°F)

Compare climate in Portobello with other places

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

Monthly average precipitation in Portobello, New Zealand

Portobello usually has the most precipitation in January, February and December, with an average of 12 rainy days and 90 mm (3.5 inches) of precipitation per month. The driest months in Portobello are March, June and August. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Portobello. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)90 (3.5)91 (3.6)48 (1.9)73 (2.9)50 (2.0)43 (1.7)68 (2.7)41 (1.6)56 (2.2)76 (3.0)84 (3.3)88 (3.5)
Average precipitation days (≥ 1 mm)1210913109111211141314

Monthly sunshine hours in Portobello, New Zealand

The sunniest months in Portobello are February, November and December, when the sun shines an average of 10 hours 7 minutes a day. Least sunny months in Portobello: May, June and July receive an average of 5 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Portobello. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours259283262219190162175203246264302325
Mean daily daylight hours15h 14m13h 57m12h 21m10h 45m9h 23m8h 42m9h 2m10h 13m11h 46m13h 23m14h 51m15h 38m

Solar UV radiation in Portobello, New Zealand

Portobello experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 11 - 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 Portobello UV Index data.

Average daily maximum UV levels by month for Portobello. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1311853223581012