2018 Long Range Weather Forecast for Hawaii


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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 annual Old Farmer’s Almanac, available online and in stores.

Note: Long range forecasts are regional, not city-specific. If your city is located inside a region, the region's forecast will apply to you.

Free 2-Month Weather Forecast

July 2018 Long Range Weather Forecast for Hawaii
DatesWeather Conditions
Jul 1-13Showers and t-storms E and W, daily showers C; cool
Jul 14-21Scattered showers, warm
Jul 22-31Showers and a few heavier t-storms E, daily showers C and W; warm, then cool
Julytemperature 80.5 (0.5° below avg.)
precipitation 0.3" (0.2" below avg.)

August 2018 Long Range Weather Forecast for Hawaii
DatesWeather Conditions
Aug 1-13A few showers, warm
Aug 14-22Showers and heavier t-storms E, a few showers C and W; warm
Aug 23-31Scattered showers, cool
Augusttemperature 80.5° (1° below avg.)
precipitation 0.4" (0.2" below avg.)

Annual Weather Summary: November 2017 to October 2018

Winter season temperatures will be below normal, on average, with the coolest periods in early and mid-December, early and mid-January, and mid-February. Rainfall will be below normal, with the stormiest periods in mid-December and early and mid-March. April and May will be slightly cooler and drier than normal. Summer temperatures will be cooler than normal, on average, with slightly below normal rainfall. The warmest period will be in mid-June. September and October will be cooler and slightly drier than normal.

Key: east (E), central (C), west (W). Note: Temperature and precipitation are substantially based upon topography. The detailed forecast focuses on the HonoluluWaikiki area and provides general trends elsewhere.

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 2017 to October 2018

    Temperature and Precipitation Graph

    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.