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...
FLY BOYS
Royal New Zealand Air Force Base Woodbourne near Blenheim was established in 1939 as the base for No2 Service Flying Training School. In 1945 the training school was closed and the RNZAF Central Flying School along with some ground training units, including the Officers' School of Instruction were relocated to Woodbourne. Today, Woodbourne is the Air Force's only support base and has no operational squadrons based there.
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