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Monthly climate in Blenheim, New Zealand

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Blenheim features a oceanic climate (Cfb).Temperatures typically range between 8 °C (47 °F) and 17 °C (63 °F) through the year, but rarely can drop to 1 °C (34 °F) or can rise to as high as 29 °C (84 °F).The average annual precipitation amounts to about 935 mm (36.8 inches) and receives 112 rainy days on the 1 mm (0.04 inches) threshold annually.Blenheim enjoys an average of 3200 hours of sunshine throughout the year, and daylight varies from 9 hours 12 minutes to 15 hours 6 minutes per day.

Monthly average temperatures in Blenheim, New Zealand §

The warmest months in Blenheim are January, February and December, with daily mean temperatures ranging from 16 to 17 °C (61 - 63 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 8 to 9 °C (47 - 48 °F) throughout the day. On average each year, Blenheim experiences 5 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 Blenheim, New Zealand.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 29°C
(84°F)		 28°C
(82°F)		 24°C
(76°F)		 22°C
(71°F)		 19°C
(67°F)		 17°C
(63°F)		 15°C
(59°F)		 18°C
(65°F)		 18°C
(65°F)		 20°C
(69°F)		 24°C
(75°F)		 25°C
(77°F)
Mean maximum 26°C
(80°F)		 25°C
(77°F)		 23°C
(74°F)		 21°C
(70°F)		 18°C
(65°F)		 15°C
(59°F)		 14°C
(57°F)		 16°C
(61°F)		 18°C
(64°F)		 19°C
(67°F)		 22°C
(72°F)		 24°C
(75°F)
Average high 21°C
(70°F)		 21°C
(69°F)		 19°C
(66°F)		 17°C
(62°F)		 15°C
(58°F)		 12°C
(54°F)		 11°C
(53°F)		 12°C
(54°F)		 13°C
(56°F)		 15°C
(60°F)		 17°C
(63°F)		 19°C
(67°F)
Daily mean 17°C
(63°F)		 17°C
(63°F)		 15°C
(60°F)		 13°C
(56°F)		 11°C
(52°F)		 9°C
(48°F)		 8°C
(47°F)		 9°C
(48°F)		 10°C
(50°F)		 12°C
(54°F)		 14°C
(57°F)		 16°C
(61°F)
Average low 14°C
(57°F)		 13°C
(56°F)		 12°C
(54°F)		 10°C
(50°F)		 8°C
(47°F)		 6°C
(43°F)		 5°C
(41°F)		 6°C
(43°F)		 7°C
(44°F)		 9°C
(48°F)		 11°C
(51°F)		 13°C
(55°F)
Mean minimum 9°C
(49°F)		 9°C
(49°F)		 8°C
(47°F)		 5°C
(42°F)		 3°C
(38°F)		 4°C
(39°F)		 2°C
(35°F)		 2°C
(36°F)		 2°C
(36°F)		 3°C
(38°F)		 7°C
(44°F)		 8°C
(47°F)
Minimum 7°C
(45°F)		 8°C
(46°F)		 7°C
(44°F)		 4°C
(39°F)		 1°C
(35°F)		 1°C
(35°F)		 1°C
(34°F)		 1°C
(34°F)		 1°C
(34°F)		 2°C
(36°F)		 5°C
(41°F)		 6°C
(43°F)

Compare climate in Blenheim with other places

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

Monthly average precipitation in Blenheim, New Zealand §

Blenheim usually has the most precipitation in April, July and December, with an average of 10 rainy days and 99 mm (3.9 inches) of precipitation per month.The driest months in Blenheim are January, February and March. On average, 58 mm (2.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Blenheim, New Zealand.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 41 (1.6) 67 (2.6) 66 (2.6) 98 (3.9) 76 (3.0) 77 (3.0) 97 (3.8) 73 (2.9) 82 (3.2) 76 (3.0) 81 (3.2) 101 (4.0)
Average precipitation days (≥ 1 mm) 6 6 8 8 8 10 12 10 10 11 11 12

Monthly sunshine hours in Blenheim, New Zealand §

The sunniest months in Blenheim are February, November and December, when the sun shines an average of 10 hours 50 minutes a day.Least sunny months in Blenheim: May, June and July receive an average of 6 hours 31 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Blenheim, New Zealand.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 300 305 288 242 219 180 199 233 262 297 319 350
Mean daily daylight hours 14h 46m 13h 41m 12h 19m 10h 56m 9h 47m 9h 12m 9h 29m 10h 29m 11h 48m 13h 11m 14h 26m 15h 6m

Solar UV radiation in Blenheim, New Zealand §

Blenheim 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 Blenheim UV Index data.

Average daily maximum UV levels by month for Blenheim, New Zealand.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 13 13 9 7 4 2 2 4 6 9 11 13