Last year’s Halloween was a snowy one for many Chicago-area residents, but will the weather cooperate a bit more in 2024?. In the days leading up to Halloween, the forecast is anything but scary, and is in fact poised to potentially set records. According to the NBC 5 Storm Team, Monday’s forecast will be quite pleasant, with highs in the mid-to-upper 60s, but the mercury will continue rising on Tuesday and Wednesday.