2019 Long Range Weather Forecast for Kahului, HI

Get the Long Range Weather for Your Location

See long range weather forecasts for the next 60 days from The Old Farmer’s Almanac! Our long range forecasts can be used to make more informed decisions about future plans that depend on the weather, from vacations and weddings to sporting events and outdoor activities.

To see long term forecasts for the entire year, pick up a copy of The 2019 Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific.

Free 2-Month Weather Forecast

August 2019 Long Range Weather Forecast for Hawaii
DatesWeather Conditions
Aug 1-7Rainy periods E and W, sprinkles C; warm
Aug 8-18Showers and heavier t-storms E, sunny C and W; warm
Aug 19-21Sunny, cool
Aug 22-31A few showers, warm
Augusttemperature 80.5° (1° below avg.)
precipitation 1.1" (0.5" above avg.)

September 2019 Long Range Weather Forecast for Hawaii
DatesWeather Conditions
Sep 1-5Showers, warm
Sep 6-15Sunny E, a few showers C and W; hot
Sep 16-23A few showers, hot
Sep 24-30Scattered t-storms, cooler
Septembertemperature 81.5° (2° above avg. E, 2° below W)
precipitation 1.3" (0.5" above avg.)

Annual Weather Summary
November 2018 to October 2019

Winter temperatures will be above normal, on average, with the coolest periods in early to mid-December, mid-February, and early March. Rainfall will be above normal E (see key below) and below normal W, with the stormiest periods in mid- to late November and early February. April and May will be warmer than normal, with rainfall above normal E and below normal W. Summer temperatures will be slightly cooler than normal, on average, with above-normal rainfall. The warmest periods will be in late June, late July, and early August. September and October will see temperatures above normal E and below normal W and be slightly rainier than normal.

About the Hawaii Region

The Hawaii long range weather region includes all or part of the following states: HAWAII (Hilo, Honolulu, Kahului, Pearl City, Waipahu).

Hawaii Neighboring Regions

Here are the regions that neighbor the Hawaii long range weather region:

    Temperature and Precipitation November 2018 to October 2019

    Temperature and Precipitation Chart, November 2018 to October 2019 for Kahului, HI

    Reader Comments

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    Hawaii’s volcanoes and earthquakes

    Do you have any foresight on the current volcanic eruptions and earthquakes on the big island going forward?


    On the Right-Hand Calendar Pages of the print or digital edition, we note the days on which the Moon rides high or low (in the sky). Traditionally, the date of the high begins the most likely 5-day period of earthquakes in the Northern Hemisphere; the date of the low indicates a similar 5-day period in the Southern Hemisphere. Also noted are two days each month when the Moon is on the celestial equator, indicating the most likely time for earthquakes in either hemisphere. This month, May, the Moon rides high on May 18 (low on the 4th). The Moon is on the celestial equator on May 12 and May 24. All of this is based on the idea of the Moon’s “pull” on Earth.

    Please note that the volcano introduces special circumstances/conditions.