Complete 2015 Long-Range Weather Forecast for the Intermountain Region, November 2014 to October 2015 includes week-by-week details.
Free 2-Month Weather Forecast
SEPTEMBER 2015: temperature 58° (4° below avg.); precipitation 0.8" (0.5" above avg. north, 1" below south); Sep 1-11: Sunny, chilly; Sep 12-19: Scattered showers, cool; Sep 20-26: Sunny, warm; Sep 27-30: Showers, cool.
OCTOBER 2015: temperature 48° (3° below avg.); precipitation 1" (avg.); Oct 1-10: Showers, then sunny, cool; Oct 11-16: Showers, cool; Oct 17-25: Sunny north, rain and snow showers south; cool; Oct 26-31: Showers north, sunny south; mild.
Annual Weather Summary: November 2014 to October 2015
Winter temperatures will be above normal, with below-normal snowfall and with precipitation above normal north, below south. The coldest periods will be late December and mid- to late February north, and mid-December south. The snowiest period in northern and central sections will be in early December; mid-February and early to mid-March in the south.
April and May will be slightly drier than normal, with near-normal temperatures.
Summer will be hotter than normal, with above-normal rainfall. The hottest periods will be in mid- and late June, early July, and mid- to late July.
September and October will be cooler than normal, with precipitation slightly above normal in the north and below in the south.