Weather Forecasts Fall Farmers Almanac

Projected Conditions for 2025-2026

  • The Old Farmer’s Almanac sees Idaho (Intermountain region) having a warmer-than-normal winter overall, with the coldest stretches expected in late November, early December, and early February. 107.9 LITE FM

  • Precipitation is expected to be above normal overall, but snowfall may vary: less snow in the northern parts of the region and possibly more in the southern or mountain zones. 107.9 LITE FM

  • The almanac also describes the winter forecast as “Chill, Snow, Repeat,” implying repeated swings of cold and snow events across the season. farmersalmanac.com+1

  • Local Boise-area sources echo that interpretation: the almanac shows mild temperatures dominating the winter map, but still with potential for deep snow and strong storms especially in places like Idaho and Washington. Powder

  • For fall 2025, the outlook is for warmer and drier-than-normal conditions across Idaho, especially in September, with some predictions of “very warm weather” into October.

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Plot of Average Temperature Degree Days with Base of 55 ° -- Boise

The line graph illustrates how warmth accumulates throughout the year. When the curve is flat, average daily temperatures are below 55 °F, indicating Boise’s cool season. When the line rises sharply, temperatures are above 55 °F, and degree days increase rapidly—the warm growing season. The point where the curve first turns upward marks the beginning of spring; when it flattens again in early fall, the warm season of steady heat ends. Overall, the graph shows a long cool period and a shorter but more intense warm season in Boise’s annual climate cycle.