Friday will be the darkest day of the year — and one of the wettest.

The winter solstice will be a winter washout, as New Yorkers trying to get out of town for the holiday will be drenched, according to forecasters.

“The city is going to get soaked,” AccuWeather senior meteorologist Dave Dombeck told The Post on Thursday.

“It’s going to be noticeable … It’s going to rain hard enough that water will pond up in some low-lying areas.”

Dombeck said the storm, which will move into town from the Deep South, will drop between 1½ and 3 inches of rain.

That downpour, combined with the fact that Friday is the shortest day of the year — with a 4:31 p.m. sunset — will not make for a jolly start for Christmas travelers.

“It does have an impact on our area airports,” Dombeck said. “Certainly, there’s going to be delays.”

Wind gusts of up to 50 mph will also hit throughout the day, forecasts show.

“It’s not out of the question that you have local power outages, perhaps with tree limbs down,” Dombeck said.

The worst of the rain is expected to be over by 5 p.m. Friday, according to Dombeck. Temperatures on Friday are otherwise expected to be mild, with a forecasted high of 64 degrees and a low of 45.

Dombeck said the storm has the potential to break the Dec. 21 record of 2.49 inches, set in 1973.

Robert Sinclair, a spokesman for AAA in New York, said a record-breaking 112.5 million people are projected to travel nationwide this holiday season.