Keep dreaming of a white Christmas in New York.

The Big Apple was covered in a light layer of snow Tuesday morning, marking the first time it snowed on Christmas Eve in more than two decades — but it won’t last.

The sun is expected to break out for Wednesday’s festivities, bringing with it warmer temperatures, meaning the snow sprinkles will mostly melt before dinner hits the table.

“We hope you enjoyed it when it was here this morning,” FOX Weather meteorologist Stephanie van Oppen told The Post.

An inch of snow was logged in Central Park on Tuesday morning – the highest amount of snow to fall on Christmas Eve in the Big Apple since two inches fell in 1998, van Oppen noted.

Snow clouds moved quickly across the I-95 corridor and were pushed off the coast before noon, with the possibility of snow falling on Christmas Day.

Wednesday is expected to be sunny with a high of 35 degrees, meaning an overnight drop to over 20 degrees won’t be enough to keep the snow from melting on the holiday.

Temperatures are expected to rise above 40C for the rest of the week, with van Oppen predicting the chances of snow in the Big Apple for the rest of the calendar year remain slim – but a snow-free Christmas is in order New Yorkers are now somewhat used to it.

Light dust fell across the metro area on Christmas Day 2017, but the last time there was measurable snow on the holiday was in 2002, when 5 inches fell over the city.

However, New Yorkers were more than happy with the sprinkles that landed this year.

“This is more than we’ve had in so long – and it’s nothing!” Meagan Finn, 26, told The Post. “It’s not as much as I would have liked, but I’ll take it, I’ll enjoy it.”

Social worker Susan Ginsberg shared the same sentiment, noting that she would have much preferred a blizzard: “But I’ll take anything, I’ll take that over nothing.”

“It’s just peaceful and playful, and the fact that it’s Christmas and people are with their families just brings back memories of family and childhood,” Ginsberg continued.

“Every year we hope it’s going to snow and it just hasn’t happened, but this year it was nice to walk outside and see the snow on the ground.”

Julian Gonsalves, 67, was reminded of the iconic Christmas song ‘I’m Dreaming of a white Christmas’ when he woke up this morning, adding that his dream had come true after so many years.

“There is no Christmas without snow. “It’s a boring Christmas because the snow is what Christmas is all about,” the security guard said.

“Forget the food – it makes me feel like this is the real Christmas. That’s what Christmas is all about.”

Jim Thornton and Emma Sherston from the UK almost missed the rare snowfall – the couple extended their trip to the Big Apple because Thorton had a strong feeling the flakes were coming for the holidays.

“We are really looking forward to a white Christmas, really excited! We are from the UK and this is the first white Christmas in about 20 years. It usually doesn’t snow until January or February, if it snows at all. Normally we just get rain and clouds,” Thorton said.

“I think it makes it feel like a more traditional Christmas rather than a cold, gray day. I traditionally associate snow with Christmas. Normally we just don’t have it, but we’re thinking about it.”

The couple joked that they had brought the snow to town, and Sherston added that the sight of the white fluff sparked “childlike excitement.”

“Waking up and it’s white outside, so different. It’s exciting, no matter how old you are. It’s this childish excitement.”