Weather on all of the Hawaiian Islands is very consistent, with only minor changes in temperature throughout the year. This is due to year-round warm sea surface temperatures, which keep the overlying atmosphere warm as well. In practical terms, there are only 2 seasons: the summer months (called Kau in Hawaiian) that extend from May to October and the winter months (Ho'oilo) that run from November to April. The average daytime summer temperature at sea level is 85 degrees F. (29.4 C) while the average daytime winter temperature is 78 degrees (25.6 C). Temperatures at night are approximately 10 degrees F. lower. 

The islands are an incredible collection of many diverse micro-environments, each with its own unique weather, plants and animals. As a result of the shielding effect of volcanic mountains and the differences in weather found at various elevations, there are as many different climate zones here as exist along the entire coast stretching from Alaska to Costa Rica. For the full impact of this, visitors need only explore the islands by car or helicopter and they’ll see the beauty of tropical rain forests, cool alpine regions, stony deserts and sunny beaches - all within the span of just a few short miles.

Hawaii
   guide, hotels

  Honolulu, Capitol
  The city
Honolulu brief history
 Arrival
 Travel info
 Getting around
Restaurants
Nightlife
Ocean safety
Surfing, windsurfing,
     diving, snorkeling
 Best of Honolulu
Whether
Rainfall & storms

Surfing conditions
Mountains and volcanoes

Hawaii
   guide, hotels

Explore Honolulu
Bishop Museum
Chinatown
Diamond Head volcano
Hanauma Bay
Pearl Harbor Memorial
Nat'l Cemetery of the Pacific

  Waikiki beach
   Maui
   Kapalua

  Hawaii
  Hawaii Volcanoes        
     National Park
  Pearl Harbor brief
     history
  Kapiolani Park
  Hawaiian Island

Google maps