Because much of the Marlborough region is sheltered by high country to the west, south and in some areas to the east, it is New Zealand's sunniest region.

Warm, dry and settled weather predominates during summer. Winter days often start with a frost, but are usually mild overall. Typical summer daytime maximum air temperatures range from 20°C to 26°C, but occasionally rise above 30°C. Late winter and early spring is normally the most unsettled time of the year.

Typical winter daytime maximum air temperatures range from 10°C to 15°C. Annual hours of sunshine average at least 2,400 hours. High temperatures are frequent in Blenheim and may be accompanied by föhn winds from the northwest, characterised by the distinctive "wave" cloud formations.


Temperature
Mean daily maximum in summer (January): 23.8°C
Mean daily minimum in summer: 12.5°C
Mean daily maximum in winter (July): 12.8°C
Mean daily minimum in winter: 2.1°C

Sunshine Hours
More than 2,400 per year

Rainfall
Mean annual rainfall: 1,249mm
Wet days (more than 1mm): 76

Statistics from National Institute of Water and Atmospheric Research
It's a Fact...
RESOLUTION & ADVENTURE
Captain James Cook visited the Marlborough Sounds for the second time in 1773 aboard the Resolution. He had left England with Capt. Tobias Ferneaux, who commanded the Adventure, but the ships became separated in a storm. Ferneaux arrived in the Sounds 10 days before Cook, but departed before Cook's arrival. During Ferneaux's visit to the Sounds, several of his crew were killed and eaten by local Maori.
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