The National Weather Service predicts that record-breaking cold might hit parts of the United States as October winds down.
Dr. Rick Knabb, a meteorologist for The Weather Channel, predicts that Tuesday and Wednesday will be cooler than normal throughout most of the central and eastern United States.
"It may be a good idea to figure out how to incorporate a jacket into that costume tomorrow night across much of the lower 48," the National Weather Service said in a social media post.
"Temperatures will be cold enough on Halloween night for most of the eastern two thirds of the country that jackets will be required — unless you can strategically wear warm layers underneath your costume to stay warm,".
On Halloween day, temperatures will be the lowest across the Plains, Midwest, and sections of the Tennessee Valley and Appalachians, according to Knabb.
Temperatures are expected to be 20–30 degrees Fahrenheit lower than normal for the time of year in certain regions.