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Weather in Hawaii in October. Average high temperatures in Hawaii in October hover in the mid to upper 80â²s, with lows in the mid 70â²s. You can expect cooling tradewind breezes most of the time, although weather patterns change quite frequently.
The Seasons in Hawaii. This is not to say that Hawaii weather is the same every day. Hawaii has a normally drier season during the summer months (May to October), and a rainier season which generally runs during the winter (from November until March).