Hawaii’s climate is typical for the tropics, although temperatures and humidity tend to be a bit less extreme due to near-constant trade winds from the east. Summer highs are usually in the upper 80s °F, during the day and mid 70s, at night. Winter day temperatures are usually in the low to mid 80s, and (at low elevation) seldom dipping below the mid 60s at night. Snow, not usually associated with the tropics, falls at 13,796 ft on Mauna Kea and Mauna Loa on the Big Island in some winter months. Snow rarely falls on Haleakala. Mount Wai'ale'ale, on Kauai, has the second highest average annual rainfall on Earth, about 460 inches. Most of Hawaii has only two seasons: the dry season from May to October, and the wet season from October to April.

Monthly Average Low and High Temperatures in Select Cities:

City Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec.
Hilo 64 F 64°F 65°F 66°F 67°F 68°F 69°F 69°F 69°F 68°F 67°F 65°F
  79°F 79°F 79°F 79°F 81°F 82°F 83°F 83°F 83°F 83°F 81°F 80°F
Honolulu 66°F 65°F 67°F 68°F 70°F 72°F 74°F 75°F 74°F 73°F 71°F 68°F
  80°F 81°F 82°F 83°F 85°F 87°F 88°F 89°F 89°F 87°F 84°F 82°F
Kahului 63°F 63°F 65°F 66°F 67°F 69°F 71°F 71°F 70°F 69°F 68°F 65°F
  80°F 81°F 82°F 82°F 84°F 86°F 87°F 88°F 88°F 87°F 84°F 82°F
Lihu'e 65°F 66°F 67°F 69°F 70°F 73°F 74°F 74°F 74°F 73°F 71°F 68°F
  78°F 78°F 78°F 79°F 81°F 83°F 84°F 85°F 85°F 84°F 81°F 79°F