A light sweatshirt is a good idea while strolling on the beaches and enjoying the warmth of the sea on a sheltered beach. A drop in cloud cover, particularly at the mountain peaks, and humidity level are the features of the dry season as the sun returns to full duty with average sunshine of 10 hours a day.
A constant supply of fresh ocean air keeps the temperatures moderate and unvarying over long periods. Showers are frequent on the windward side of coasts such as Hilo, which accumulates 8. Light clothing is the order of the day except for botanists and researchers who explore the tropical rainforests in the highlands.
Caution - do not take the Hawaiian sun lightly due to the moderate temperatures as the sun rays are intense, and there is a lack of humidity; use plenty of sun protection. Trade winds flow from the area of high pressure, the North Pacific High, which lies in the north and east of Hawaii during the summer and forms a ventilation system with mild temperatures around the islands.
Night temperatures nearby the ocean hardly vary; 2 to 4 degrees compared to the daytime temperatures, which sees the tourists gazing at the stars in cloudless skies after sunset. The amount of sunshine is excellent throughout the year, especially in the leeward areas; Hawaii receives an average of 10 hours of brilliant sunshine in June. It also brings thunderstorms to the region mainly due to localized weather patterns that bring winds, lightning, and sometimes hail along with them.
Waterspouts are common in inland areas of the islands. The south and western sides of the islands are more sunny and dry and enjoy comparatively lesser storm interference. Explorers and mountain hikers need to pack a raincoat or umbrella, as convectional rainfall is standard on the mountain slopes during the summer. On average, the sun is present on the horizon for 10 hours a day in Hawaii.
Just keep an eye on storms to enjoy the fantastic sailing and surfing opportunities available in the warm waters. August is also the driest and the least humid month with an average of 1. The difference between high temperatures on the coast at Hilo and the southwest at Honolulu is approximately 8 degrees.
While Hilo receives 9. Hawaii sees such microclimatic differences throughout the year and hence is a popular tourist destination with a time and place for everybody. Additionally, hurricanes common of equatorial waters do not affect Hawaii mainly due to its local weather patterns and the vast distance from main continental lands. The sun is never out of its place for extended periods, and there is never a real off-season to get cheap flights and accommodations.
The active volcanoes around Hawaii , such as Molokini, attract many tourists, as do the tropical rainforests of the highlands - September days are perfect for such hikes as the rainfall is relatively smaller than the wet season and the temperatures are comfortable although nights are usually almost freezing. Keep in mind that temperatures decrease with a rise in elevation and plan to return by the end of daylight.
Winds are less troublesome on the leeward sides of the mountains and at higher altitudes. Spectacular views of the surrounding landscape abound from the mountain peaks, which is worth the efforts of hours of ascent in the backdrop of the sunny weather.
Rain averages 3. The storms sometimes bring rain that lasts up to several days. Dry areas typically see a majority of their annual rainfall during such storms.
The temperatures vary little also when compared with the averages. This happens both because of the location at tropical latitudes and because of the enormous distance from the continents, from which cold or hot air masses could arrive.
Rainfall is influenced by the trade winds, so it varies according to slope orientation: you can move from a forest to a desert in a few kilometers or miles , just by climbing over a hill. In the following map, we can see a scheme of the situation, relative to the island of O'ahu: the trade winds bring rainfall on the exposed slopes and hot and dry weather on the leeward slopes.
This situation also occurs on other islands where elevations are found in the interior, while flat islands such as Ni'ihau and Kaho'olawe are entirely arid. Your use of this website constitutes your acceptance of all the terms, conditions, and disclaimers posted herein. If you do not agree with any part of these terms and conditions, you should not use this website. We also receive a small commission from travel partners for some of the links found on this website.
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Download your copy of our Travel Alert: Hawaii Travel Restrictions. Published by: John C. Oahu Weather - including Honolulu weekly forecast, rainfall and temperature graphs, and precipitation map. Maui Weather - including Valley Isle weekly forecast, rainfall and temperature graphs, and precipitation map.
Additional Weather Graphics for the Hawaiian Islands Hopefully, the Hawaii weather graphics found throughout this article and our brief introduction to the weather here in the Hawaiian Islands will help you plan an enjoyable visit. Hawaii Statewide Weather click to enlarge. General Weather Patterns The best thing about Hawaii's weather is that it is very localized.
Here are a few additional things to keep in mind, summarized, about Hawaii's weather: Read up on the forecasts at the University of Hawaii Weather before you visit and during your stay, as they have the best and most accurate forecast in the islands. Don't listen to the Weather Channel or watch the NOAA forecast graphs, of course, they'll predict rain - it rains almost every day in Hawaii The only time it's really wet in Hawaii for a prolonged time is during the winter months, usually from November until March.
As far as temperature goes, plan accordingly for the island you're visiting. Volcano, on the Big Island, or Kokee on Kauai, can get quite chilly at night for example. If you're planning to go up to higher elevations on either Maui or the Big Island, bring a small coat and long convertible pants.
It can get very cold at the summit of the larger volcanoes - trust us on that! Hawaii Climate Patterns Long-Term Weather Trends On average, the summer months are the driest and sunniest, but they are also the warmest and most humid. Hawaii Year-Round Temperatures Hawaii is fortunate in that it has a mild and pleasant temperature throughout the year, although those not used to humidity may be a bit uncomfortable. Hawaiian Islands Weather Charts Below we've pulled together our weather graphics for all of the islands showing their annual precipitation and temperatures.
Lihue, Kauai Average Temperatures. Lihue, Kauai Average Precipitation. Kauai Annual Precipitation. Honolulu Average Temperature. Honolulu Average Precipitation. Oahu Annual Precipitation. Kahului, Maui Average Temperatures. Maui Annual Precipitation. Big Island Annual Precipitation. Additional Hawaii Weather Graphics. Hawaii Annual Precipitation Maps click to enlarge.
Average Hawaii Rainfall click to enlarge. Average Hawaii Temperatures click to enlarge. Hawaii Annual Precipitation. Maui Weather learn more. Oahu Weather learn more. Big Island of Hawaii Weather learn more.
Download our Hawaii Map Packet Includes most major attractions, all major routes, airports, and a chart with estimated driving times for each respective island.
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