Long-Range Weather Forecast for Alton, IL

October 2026 Long Range Weather Forecast for Heartland

Dates	Weather Conditions
Oct 1-10	Sunny, then rainy periods; turning warm
Oct 11-15	Sunny north, rainy periods south; chilly
Oct 16-19	Showers, quite chilly
Oct 20-23	Sunny, turning warm
Oct 24-31	Rainy periods, mild
October	temperature 57° (1° above avg. north, 1° below south) precipitation 4" (1" above avg.)

November 2026 Long Range Weather Forecast for Heartland

Dates	Weather Conditions
Nov 1-7	Scattered showers, then sunny; chilly, then warm
Nov 8-15	Sunny; cool, then warm
Nov 16-25	Showers, then sunny; cool, then warmer
Nov 26-27	Showers, cool
Nov 28-30	Sunny, then showers; warm
November	temperature 47° (4° above avg.) precipitation 1" (1" below avg.)

12-Month Long-Range Weather Outlook

November 2026 to October 2027

Winter will be warmer than normal, with the coldest periods in early and late January and early March. Although overall precipitation will be above normal, snowfall will be near to below normal. The snowiest periods will be in early December, late January, and early March. April and May will be warmer than normal, with rainfall above normal in the north and below south. Summer will be warmer and wetter than normal. The hottest periods will be in much of July and early August. September and October will be warmer and drier than normal.

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

Weather Trend Graph

November 2026 to October 2027