Long-Range Weather Forecast for Boulder, CO

November 2026 Long Range Weather Forecast for High Plains

Dates	Weather Conditions
Nov 1-10	Sunny, quite warm
Nov 11-22	Rain and snow showers, turning cold
Nov 23-30	Sunny, becoming very warm
November	temperature 44° (6° above avg.) precipitation 0.6" (0.4" below avg.)

December 2026 Long Range Weather Forecast for High Plains

Dates	Weather Conditions
Dec 1-3	Sunny, warm
Dec 4-11	A few snow showers, cold
Dec 12-17	Rainy, warm
Dec 18-22	Snow showers, cold
Dec 23-31	Flurries, mild
December	temperature 31° (2° above avg.) precipitation 0.5" (avg.)

12-Month Long-Range Weather Outlook

November 2026 to October 2027

Winter temperatures will be above normal, with the coldest periods in early and late January and early and late February. Precipitation and snowfall will be below normal. The snowiest periods will be in late January and mid-March. April and May will be cooler than normal, with above-normal precipitation. Summer will be hotter and wetter than normal, with the hottest periods in mid- and late July and early and late August. September and October will be warmer than normal in the north and cooler south, with above-normal precipitation.

See the complete 12-month weather forecast in The Old Farmer’s Almanac..

Weather Trend Graph

November 2026 to October 2027