Complete 2015 Long-Range Weather Forecast for the Hawaii Region, November 2014 to October 2015 includes week-by-week details.
Free 2-Month Weather Forecast
SEPTEMBER 2014: temperature 81° (0.5° below avg.); precipitation 0.3" (1" below avg. east, avg. west); Sep 1-11: Showers and t-storms, cool east; scattered showers, turning hot central and west; Sep 12-14: A few t-storms, cool; Sep 15-20: Scattered showers, seasonable; Sep 21-23: A few showers, cool; Sep 24-30: Scattered showers, cool.
OCTOBER 2014: temperature 80° (avg.); precipitation 0.5" (1.5" below avg.); Oct 1-6: Scattered showers, cool; Oct 7-14: Showers; cool east, warm central and west; Oct 15-22: A few showers, seasonable east; sunny, very warm central; scattered t-storms, cool west; Oct 23-25: Sunny, seasonable; Oct 26-31: Showers, turning very warm.
Annual Weather Summary: November 2014 to October 2015
Winter temperatures will be near or slightly above normal, with the coolest periods in late December, early and mid-January, and early and mid-February. Rainfall will be greater than normal on Oahu, Lanai, and Molokai, but below normal elsewhere.
April and May will be rainier than normal, especially on the Big Island. Temperatures will be near or slightly above normal.
Summer temperatures will be near normal, with the hottest periods in mid- and late July. Rainfall will be above normal, with a tropical storm threat in mid- to late August.
September and October temperatures will be slightly cooler than normal, with above-normal rainfall.
KEY: East (E), Central (C), West (W)