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The climate of Hawaii: when to go to Hawaii

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The Hawaii are located just south of the Tropic of Cancer, this means that the climate of the islands is sub-tropical, with mild temperatures and slightly marked seasonal excursions.

The climate of Hawaii is characterized by the seasonal difference in rainfall rather than by temperature differences. In the islands there are two climatic seasons, a dry season that corresponds to the months between May and October, and a rainy season that runs from November to April.

The temperatures, as we have already mentioned, show minimal seasonal variations. For example in Honolulu, the average maximum temperatures vary between 26 ° C in January and 31 ° C in the summer months. While the average minimum temperatures vary between 18 ° C in winter and 23 ° C in summer.

Precipitation varies greatly depending on exposure to winds, areas exposed to north-east winds are much more rainy. On the highest peaks of the Mauna Kea and Mauna Loa mountains, snow is present in winter. Hurricanes on the Hawaiian Islands are an infrequent event.

The areas under wind, therefore the south-western coasts are drier and sunnier. As for the annual average rainfall, it goes from 220 mm in Kawaihae, on the island of Hawaii, to 11,280 mm in Mount Waialeale, on the island of Kauai, one of the rainiest places on Earth.

In the city of Honolulu the average annual rainfall is 450 mm, while in the city of Hilo on the island of Hawaii it exceeds 3,200 mm.

The surface temperature of the sea water varies between 24 ° C in February and 27 ° C in September and October.


Thanks to their mild climate, any time of year is good for a visit to the islands of Hawaii. The best time for a trip to the Hawaiian islands are the months between April and September.


HONOLULU (4 meters)
Month Average low (°C) Average high (°C) Precip. (mm) Precip. days
January 19,1 26,7 58,7 8,5
February 18,9 26,8 50,5 7,4
March 19,8 27,3 51,3 8,8
April 20,8 28,2 16,0 7,5
May 21,6 29,2 15,7 5,8
June 23,0 30,6 6,6 5,7
July 23,6 31,1 13,0 7,1
August 23,9 31,5 14,2 5,6
September 23,6 31,4 17,8 6,9
October 23,0 30,4 46,7 7,6
November 21,9 28,8 61,5 8,8
December 20,2 27,3 82,3 9,7
YEAR 21,6 29,1 434,3 89,4
Month Sea Water Temperature °C
January 24
February 24
March 24
April 25
May 26
June 26
July 27
August 27
September 27
October 27
November 26
December 25

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