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Monthly climate in Helensville, New Zealand

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Helensville features a oceanic climate (Cfb). Temperatures typically range between 13 °C (55 °F) and 21 °C (69 °F) through the year, but rarely can drop to 7 °C (45 °F) or can rise to as high as 26 °C (79 °F). The average annual precipitation amounts to about 1127 mm (44.4 inches) and receives 146 rainy days on the 1 mm (0.04 inches) threshold annually. Helensville enjoys an average of 3164 hours of sunshine throughout the year, and daylight varies from 9 hours 40 minutes to 14 hours 36 minutes per day.

Monthly average temperatures in Helensville, New Zealand

The warmest months in Helensville are January, February and March, with daily mean temperatures ranging from 20 to 21 °C (67 - 69 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 13 to 13 °C (55 - 56 °F) throughout the day. On average each year, Helensville 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 Helensville. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum25°C
(78°F)		26°C
(79°F)		24°C
(76°F)		23°C
(73°F)		20°C
(68°F)		19°C
(66°F)		18°C
(64°F)		17°C
(63°F)		19°C
(67°F)		20°C
(69°F)		22°C
(72°F)		24°C
(76°F)
Mean maximum24°C
(75°F)		25°C
(77°F)		24°C
(75°F)		22°C
(72°F)		20°C
(68°F)		17°C
(63°F)		17°C
(63°F)		16°C
(62°F)		18°C
(65°F)		19°C
(67°F)		21°C
(71°F)		23°C
(74°F)
Average high22°C
(71°F)		22°C
(73°F)		21°C
(71°F)		19°C
(67°F)		17°C
(63°F)		15°C
(60°F)		14°C
(58°F)		14°C
(58°F)		15°C
(59°F)		16°C
(62°F)		18°C
(65°F)		21°C
(69°F)
Daily mean20°C
(68°F)		21°C
(69°F)		20°C
(67°F)		18°C
(64°F)		15°C
(60°F)		14°C
(57°F)		13°C
(55°F)		13°C
(55°F)		13°C
(56°F)		15°C
(59°F)		17°C
(62°F)		19°C
(66°F)
Average low18°C
(65°F)		19°C
(66°F)		18°C
(64°F)		16°C
(61°F)		14°C
(57°F)		12°C
(54°F)		11°C
(52°F)		11°C
(53°F)		12°C
(54°F)		13°C
(56°F)		15°C
(59°F)		17°C
(63°F)
Mean minimum16°C
(60°F)		16°C
(61°F)		15°C
(60°F)		13°C
(56°F)		10°C
(50°F)		10°C
(51°F)		8°C
(47°F)		8°C
(47°F)		9°C
(49°F)		10°C
(50°F)		13°C
(55°F)		14°C
(58°F)
Minimum14°C
(58°F)		14°C
(58°F)		14°C
(57°F)		11°C
(52°F)		9°C
(48°F)		9°C
(48°F)		7°C
(45°F)		8°C
(47°F)		8°C
(46°F)		9°C
(49°F)		12°C
(53°F)		13°C
(55°F)

Compare climate in Helensville with other places

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

Monthly average precipitation in Helensville, New Zealand

Helensville usually has the most precipitation in July, August and September, with an average of 15 rainy days and 122 mm (4.8 inches) of precipitation per month. The driest months in Helensville are January, February and December. On average, 67 mm (2.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Helensville. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)55 (2.2)75 (2.9)85 (3.3)104 (4.1)95 (3.7)111 (4.4)120 (4.7)130 (5.1)116 (4.6)85 (3.4)80 (3.2)71 (2.8)
Average precipitation days (≥ 1 mm)6811121214141716141111

Monthly sunshine hours in Helensville, New Zealand

The sunniest months in Helensville are March, November and December, when the sun shines an average of 10 hours 19 minutes a day. Least sunny months in Helensville: May, June and July receive an average of 6 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Helensville. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours285284289236217189215237261286312347
Mean daily daylight hours14h 20m13h 26m12h 17m11h 7m10h 9m9h 40m9h 54m10h 44m11h 51m13h 1m14h 3m14h 36m

Solar UV radiation in Helensville, New Zealand

Helensville experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure. May, June and July are in the 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 Helensville UV Index data.

Average daily maximum UV levels by month for Helensville. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)141410743357101113