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Hawaii Weather Information
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Visit Haleakala Crater Live Camera
Hawaii has two seasons, winter and summer. The main differences are the amount of rain and to a lessoer degree the temperatures. The average temperature year-round is 75º F. The warmest weather is in August and the coldest weather in January. The daytime temperature may vary 5 - 7º F. February is the most unpredictable month.
Temperatures depend on elevation. In summer, it is cooler at elevations over 2000-ft. The temperature drops three degrees for every 1000-ft of elevation. It also rains more in the mountains and upcountry areas, especially on the windward side.
The weather in the off-season travel period (April through December 15, and especially April to mid-July and September to Christmas) may actually be better than the weather during high-season.
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Starting in summer, from May through mid-October, daytime temperatures are in the 80s and night times from the low 70s to the low 80s. Consistent trade winds keep summer temperatures tolerable. "Konas" can blow in from the south or west and bring humid, sticky, or sweltering weather and thunderstorms. Showers are short. Days are longer.
Winter runs from mid-October through April. During this period, rains are more frequent, even on leeward coasts. Daytime temperatures at sea level are in the mid-70s to low 80s. Nighttime temperatures run from the low 60s to the low 70s. Trade winds that usually blow in from the northeast are somewhat erratic and in February, may actually cease for a few weeks.
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