HAWAII WEATHER AND CLIMATEThe Big Island of Hawaii is one of the most remote and most beautiful places on Earth. The climate is tropical and temperatures and humidity are less extreme than in other tropical locations because of the constant trade winds blowing from the east.
Summer highs are usually in the upper 80s F, (around 31° C) during the day and mid 70s, (around 24° C) at night. Winter temperatures during the day are usually in the low to mid 80s, (around 28° C) and (at low elevation) seldom below the mid 60s (18° C) at night. Snow falls at 4,205 meters (13,796 ft) on Mauna Loa on the Big Island in some winter months, and is a beautiful sight from the beaches below.
Most of Hawaii has only two seasons: summer from May to October, and winter from October to April. Sometimes it's very hard to tell the difference. Water temperatures drop by about five degrees in the winter and the days become a bit shorter. But daytime temperatures are about the same. Humpback whales spend the winter in the waters around Hawaii and sometimes that's the only sign that winter has arrived.
The trade winds blow from the east across all of the Hawaiian Islands. In the Kona area this means gentle breezes that make it easy to stay cool even in the warm sun. Kona is in the wind shadow of the giant Mauna Loa and Mauna Kea volcanos. That means it is sheltered from strong winds and rain storms making it relatively dry. The Hilo side of the island gets a lot of rain while Kona experiences sunshine almost every day of the year.