Snow joke: Chicago is bracing for the coldest air of the season so far

Chicago's remarkably warm fall is about to hit a chilly speed bump. Temperatures will tumble to their lowest levels in nearly seven months, with a few wet snowflakes possible before warmer weather returns. Chicagoans are being lulled into a false sense of security. The city has had a remarkably warm fall so far, likely ranking among the top five warmest on record. The average temperature for September was closer to what Chicago averages in August. October felt more like a typical September, and through Sunday, November's average temperature is close to what the Windy City sees in October. Temperatures are expected to tumble by the end of the week, falling to their lowest level in nearly seven months. The National Weather Service is forecasting highs to fall into the middle 40s on Thursday and Friday. Lows are expected to fall into the lower 30s on both days.

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