A warm October brought a chilling end on Halloween

Most of Oct. in Ill. had above average temperatures, until a weather shift in the last few days of the month brought a shockingly cold Halloween and even snow in some areas, according to Illinois State Climatologist Trent Ford at the Illinois State Water Survey.

A few days in the final week of the month were 15 to 20 degrees above normal. Oct.'s average temperatures ranged from the low 50s in northern Ill. to the low 60s in southern Ill., between one and two degrees above normal in most places.

The brief taste of winter in the last few days of the month brought widespread low temperatures in t...