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Monthly climate in Porirua, New Zealand

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Porirua features a oceanic climate (Cfb). Temperatures typically range between 11 °C (52 °F) and 17 °C (63 °F) through the year, but rarely can drop to 6 °C (43 °F) or can rise to as high as 23 °C (73 °F). The average annual precipitation amounts to about 1000 mm (39.4 inches) and receives 123 rainy days on the 1 mm (0.04 inches) threshold annually. Porirua enjoys an average of 3076 hours of sunshine throughout the year, and daylight varies from 9 hours 14 minutes to 15 hours 3 minutes per day.

Monthly average temperatures in Porirua, New Zealand

The warmest months in Porirua are January, February and March, with daily mean temperatures ranging from 16 to 17 °C (61 - 63 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 11 to 11 °C (52 - 52 °F) throughout the day. On average each year, Porirua experiences 0 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 Porirua. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum23°C
(73°F)		22°C
(72°F)		20°C
(69°F)		19°C
(67°F)		17°C
(64°F)		16°C
(61°F)		15°C
(59°F)		14°C
(57°F)		15°C
(59°F)		16°C
(61°F)		18°C
(64°F)		20°C
(68°F)
Mean maximum20°C
(69°F)		20°C
(69°F)		20°C
(68°F)		18°C
(65°F)		17°C
(63°F)		15°C
(58°F)		14°C
(58°F)		14°C
(57°F)		14°C
(58°F)		15°C
(60°F)		17°C
(63°F)		19°C
(66°F)
Average high18°C
(64°F)		18°C
(65°F)		17°C
(63°F)		16°C
(61°F)		14°C
(58°F)		13°C
(55°F)		12°C
(53°F)		12°C
(54°F)		12°C
(54°F)		13°C
(56°F)		15°C
(59°F)		17°C
(63°F)
Daily mean17°C
(62°F)		17°C
(63°F)		16°C
(61°F)		15°C
(59°F)		13°C
(56°F)		12°C
(53°F)		11°C
(52°F)		11°C
(52°F)		11°C
(52°F)		12°C
(55°F)		14°C
(57°F)		16°C
(61°F)
Average low16°C
(60°F)		16°C
(60°F)		15°C
(59°F)		13°C
(57°F)		12°C
(54°F)		10°C
(51°F)		10°C
(50°F)		10°C
(50°F)		10°C
(50°F)		11°C
(53°F)		13°C
(55°F)		15°C
(58°F)
Mean minimum12°C
(55°F)		13°C
(55°F)		12°C
(54°F)		10°C
(51°F)		8°C
(47°F)		9°C
(48°F)		8°C
(46°F)		7°C
(45°F)		8°C
(46°F)		8°C
(46°F)		10°C
(50°F)		12°C
(53°F)
Minimum11°C
(52°F)		12°C
(54°F)		11°C
(51°F)		9°C
(48°F)		7°C
(44°F)		7°C
(45°F)		7°C
(44°F)		6°C
(43°F)		7°C
(44°F)		6°C
(44°F)		9°C
(49°F)		10°C
(51°F)

Compare climate in Porirua with other places

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

Monthly average precipitation in Porirua, New Zealand

Porirua usually has the most precipitation in April, July and December, with an average of 11 rainy days and 105 mm (4.1 inches) of precipitation per month. The driest months in Porirua are January, February and October. On average, 58 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Porirua. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)33 (1.3)69 (2.7)76 (3.0)104 (4.1)88 (3.5)101 (4.0)108 (4.3)89 (3.5)85 (3.4)72 (2.8)73 (2.9)101 (4.0)
Average precipitation days (≥ 1 mm)669101112131212111011

Monthly sunshine hours in Porirua, New Zealand

The sunniest months in Porirua are February, November and December, when the sun shines an average of 10 hours 29 minutes a day. Least sunny months in Porirua: May, June and July receive an average of 6 hours 11 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Porirua. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours286296277236206169193225249285311336
Mean daily daylight hours14h 44m13h 40m12h 19m10h 57m9h 48m9h 14m9h 31m10h 30m11h 48m13h 11m14h 24m15h 3m

Solar UV radiation in Porirua, New Zealand

Porirua experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 13 - 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 4. For more detailed information, check out our hourly Porirua UV Index data.

Average daily maximum UV levels by month for Porirua. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1313974224691013