Chicago Weather: A Mild Halloween, a Warmer Sunday, Then Showers Arrive Tuesday
The station forecast keeps Halloween evening mild in the mid-50s, warms Chicago to near 61 on Sunday and Monday, and brings the week's best rain chance on Tuesday with a high near 67.
Halloween in Chicago comes with the mildest evening of the week. The station's Open-Meteo feed showed 55.6 degrees and overcast skies in the early afternoon Saturday, on the way to a high of 57 and a low of 51, with a 23 percent chance of precipitation — a jacket-under-the-costume night rather than a rainout.
Sunday turns warmer, reaching 60.7 degrees with rain in the forecast, and Monday stays mild at 61 degrees with a 27 percent chance of precipitation. The pattern holds through the start of the work week before the week's most unsettled stretch arrives.
Tuesday is the day to watch: showers, a high near 66.7 degrees — the warmest reading in the seven-day outlook — and a 56 percent chance of precipitation, the highest of the week. Showers linger into Wednesday with a high of 63.3, before cooler air settles in for Thursday and Friday, when highs fall back to 56 and 53.7.