November is typically a month of variable temperatures in Illinois, and this November followed suit, according to Illinois State Climatologist Trent Ford at the University of Illinois’ Illinois State Water Survey.

In November, cool air moves in from the northwest and competes with the warmer, southerly air masses that dominate earlier in the fall. Average temperatures ranged from the high 30s in northern Illinois to the low 40s in southern Illinois, between 1 and 4 degrees below the 1991–2020 normal.

Daily high temperatures were in the 70s at some weather stations early in November, inc...