The weather outside will soon be terrible.

New York state could see up to 6 feet of “extreme” snowfall as the city braces for its coldest temperatures so far this season.

“It will be below freezing virtually every morning for the next, at least 10 days, maybe two weeks,” Fox Weather meteorologist Cody Braud told The Post on Saturday. “And our afternoon highs will be in the low to mid 40s every day throughout the week.

“Looking ahead to the start of next weekend, we may not even cross the 30 mark,” he added.

There’s also a chance it could snow in the Big Apple on Wednesday, although that’s not in the official forecast on Saturday.

“That’s the million-dollar question that everyone wants to know … and I wouldn’t rule that out,” Braud said.

The weather pattern is not usual, the meteorologist continued.

“It’s called ‘Clipper’ and we haven’t had one in a while,” he said. The storm is “a nuclear explosion of rain and snow that’s kind of sweeping the Northeast and parts of the Great Lakes… there’s a chance we could see some flakes flying around town sometime Wednesday.”

Parts of the Upstate are already dealing with what could be five days of devastating snowfall for the second day.

Snow totals in Harrisburg, New York, about 20 miles southeast of Watertown, are already nearly 3 feet and “it’s only going to go up,” Braud said. “It’s a five-day event. “This is only going to get worse,” he warned.

The extreme lake effect snow is also affecting parts of Pennsylvania, northeast Ohio and Michigan.

Gov. Kathy Hochul declared a state of emergency late Friday due to “potentially dangerous and life-threatening blizzard-like conditions along Lake Erie and Lake Ontario.”

Gov. Josh Shapiro deployed the Pennsylvania National Guard to Erie County “to assist any stranded drivers and ensure emergency responders can get to the people who need them,” he announced Saturday on X.