
Margaret River's climate is strongly maritime-influenced, as might be expected in a region surrounded by the ocean on three sides. With a mean annual temperature range of only 7.6°C (45.68°F), it also has, for good measure, the most marked Mediterranean climate in terms of rainfall, with less than 25% of its annual rain falling between October and April. The low diurnal and seasonal temperature range means an unusually even accumulation of warmth. While spring frosts are very rare and highly localised, lack of winter dormancy and salty winds during spring can cause problems that are unique to this region.
(Resource - Wine Australia)



