You’ll mainly find two seasons in Hawaii-summer and “winter”. (I used quotes because I’m originally from Massachusetts!
Summer usually runs from May to October in Hawaii. The native Hawaiians called this season “ho’olio” or “cooler season”.
Winter on the islands runs from November to June and this was (is) known as “kau”, the warm season.
During the summer, the sun is longer and directly overhead and the weather is warmer. A key characteristic of this season is that the winds blow consistently from northeast. The “trade winds” play a key role in Hawaiian weather. Winter in Hawaii is when the sun hangs lower in the south, the wind is more random and there is more rainfall and cloud cover.
In the summer, temperatures at sea level range from 85 to 90 degrees and 79 to 83 degrees in the winter. Very rarely does the temperature in Hawaii rise above 89 or 90 degrees or fall below 60 degrees.
There are some higher altitudes where the weather on Hawaii will get cooler such as Mauna Loa, Mauna Kea and Haleakala. At these altitudes it is not uncommon to see some snowfall in Hawaii!
Record High Temperature in Hawaii:
Big Island of Hawaii, Pahala: 100 degrees Fahrenheit in 1931
Record Low Temperature in Hawaii:
Big Island of Hawaii, Summit of Mauna Kea: 12 degrees Fahrenheit in 1970
On the longest day of the year, the Hawaiian sun will be out for 13 hours and on the shortest day, 11 hours.