2021 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 2021 Old Farmer’s Almanac, available online and in stores.

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

Free 2-Month Weather Forecast

April 2021 Long Range Weather Forecast for Hawaii
DatesWeather Conditions
Apr 1-8Scattered showers, seasonable
Apr 9-21Showers, cool
Apr 22-30Rainy East, a few showers Central and West; seasonable
Apriltemperature 76° (0.5° below avg. East, 1.5° above West)
precipitation 0.2" (0.5" below avg.)

May 2021 Long Range Weather Forecast for Hawaii
DatesWeather Conditions
May 1-3Sunny, warm
May 4-14Showers, seasonable
May 15-21Scattered showers, seasonable
May 22-31A few showers, cool
Maytemperature 77.5° (1° below avg. E, 2° above W)
precipitation 0.2" (0.5" below avg.)

Annual Weather Summary
November 2020 to October 2021

Winter season temperatures will be below average in the east and above average in the west, with the coolest periods in early and mid-December, mid-January, early February, and early March. Rainfall will be above normal in the east and below normal in the west, with the stormiest periods in mid-November, from late January into early February, and in early to mid-March. April and May will be cooler than normal in the east and warmer than normal in the west. The months will be slightly drier than normal overall. Summer will be slightly cooler than normal, with the warmest period in late July. Rainfall will be below normal in the east and above normal in the west. September and October will be cooler than normal, with the hottest period in mid-September. Rainfall will be below normal in the east and near normal in the west.

About the Hawaii Region

The Hawaii long range weather region includes all or part of the following states: HAWAII (Hilo, Honolulu, Kahului, Kailua, ‘Ewa Beach).

Hawaii Neighboring Regions

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

    Temperature and Precipitation November 2020 to October 2021

    Temperature and Precipitation Chart, November 2020 to October 2021 for Kahului, HI