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Monthly climate in Westport, New Zealand

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Westport features a oceanic climate (Cfb). Temperatures typically range between 10 °C (50 °F) and 17 °C (62 °F) through the year, but rarely can drop to 4 °C (40 °F) or can rise to as high as 25 °C (76 °F). The average annual precipitation amounts to about 2622 mm (103.2 inches) and receives 194 rainy days on the 1 mm (0.04 inches) threshold annually. Westport enjoys an average of 2821 hours of sunshine throughout the year, and daylight varies from 9 hours 10 minutes to 15 hours 7 minutes per day.

Monthly average temperatures in Westport, New Zealand

The warmest months in Westport are January, February and March, with daily mean temperatures ranging from 16 to 17 °C (62 - 62 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 10 to 11 °C (50 - 52 °F) throughout the day. On average each year, Westport 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 Westport. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum23°C
(73°F)		25°C
(76°F)		22°C
(73°F)		21°C
(69°F)		18°C
(65°F)		17°C
(62°F)		15°C
(59°F)		15°C
(60°F)		15°C
(60°F)		18°C
(64°F)		20°C
(69°F)		23°C
(73°F)
Mean maximum21°C
(69°F)		21°C
(71°F)		21°C
(69°F)		19°C
(67°F)		17°C
(63°F)		15°C
(60°F)		14°C
(58°F)		14°C
(57°F)		15°C
(59°F)		16°C
(62°F)		19°C
(66°F)		20°C
(68°F)
Average high18°C
(65°F)		19°C
(66°F)		18°C
(65°F)		16°C
(61°F)		14°C
(58°F)		13°C
(55°F)		12°C
(54°F)		12°C
(54°F)		13°C
(55°F)		14°C
(57°F)		16°C
(60°F)		17°C
(64°F)
Daily mean16°C
(62°F)		17°C
(62°F)		16°C
(62°F)		14°C
(58°F)		13°C
(55°F)		11°C
(52°F)		10°C
(50°F)		11°C
(51°F)		11°C
(52°F)		12°C
(54°F)		14°C
(57°F)		16°C
(61°F)
Average low15°C
(59°F)		15°C
(59°F)		15°C
(59°F)		13°C
(55°F)		11°C
(52°F)		9°C
(49°F)		8°C
(47°F)		9°C
(48°F)		9°C
(48°F)		10°C
(51°F)		12°C
(54°F)		14°C
(58°F)
Mean minimum12°C
(54°F)		12°C
(53°F)		11°C
(52°F)		9°C
(49°F)		7°C
(46°F)		8°C
(46°F)		6°C
(43°F)		5°C
(42°F)		5°C
(42°F)		7°C
(45°F)		8°C
(47°F)		11°C
(52°F)
Minimum10°C
(50°F)		10°C
(51°F)		10°C
(50°F)		8°C
(46°F)		6°C
(43°F)		6°C
(42°F)		4°C
(40°F)		4°C
(40°F)		4°C
(40°F)		6°C
(43°F)		7°C
(45°F)		9°C
(49°F)

Compare climate in Westport with other places

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

Monthly average precipitation in Westport, New Zealand

Westport usually has the most precipitation in May, July and September, with an average of 17 rainy days and 272 mm (10.7 inches) of precipitation per month. The driest months in Westport are January, February and June. On average, 156 mm (6.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Westport. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)169 (6.7)155 (6.1)198 (7.8)219 (8.6)250 (9.9)145 (5.7)301 (11.8)250 (9.8)264 (10.4)229 (9.0)210 (8.3)233 (9.2)
Average precipitation days (≥ 1 mm)131216171613172118191418

Monthly sunshine hours in Westport, New Zealand

The sunniest months in Westport are February, November and December, when the sun shines an average of 9 hours 46 minutes a day. Least sunny months in Westport: May, June and July receive an average of 5 hours 51 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Westport. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours257285252213186168184207228243280314
Mean daily daylight hours14h 48m13h 42m12h 19m10h 55m9h 45m9h 10m9h 28m10h 28m11h 48m13h 12m14h 28m15h 7m

Solar UV radiation in Westport, New Zealand

Westport 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 Westport UV Index data.

Average daily maximum UV levels by month for Westport. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)1313974224691113