Anyone wishing for a spate of mild winter weather should head south.
“Stay warm, because the cold is coming back tomorrow night,” said Jay Engle, an Upton-based National Weather Service meteorologist.
Wednesday’s sunny skies will help thermometers on the Island climb to 39 degrees, but the nighttime temperature is expected to slide to 22 degrees.
Wind chill will make it feel an even colder 10 to 15 degrees, the NWS website said.
That will be quite a swing from Tuesday on Long Island, when the noontime temperature was a record 58 degrees at MacArthur Airport, above the previous record for the day — 55 degrees set in 1999 — the NWS said.
Tuesday’s fog and rain — heavy enough to prompt the NWS to issue an flood advisory for eastern Long Island that expired on schedule at 2:30 p.m., also created headaches at LaGuardia and Kennedy airports.
At LaGuardia, 31 percent of outbound flights were delayed in the early evening, according to Flight Aware, a tracking website. Inbound delays were higher: 43 percent were late. Kennedy fared better, with 11 percent of outbound flights delayed and 12 percent of inbound flights late, the website said.
On Thursday, clouds will greet early risers, but the skies should gradually clear, with the thermometer rising to almost 34 degrees, the NWS said.
That night, however, could be the coldest for the next several days, with the temperature plunging to 18 degrees.
The weekend starts off sunny, with Friday’s high pegged at almost 36 degrees.
Saturday, also sunny, will be even warmer, approaching 48, the NWS said.
Nighttime revelers might need umbrellas; the chances of rain are 40 percent after 8 p.m., the NWS said.
Rain is likely on Sunday, forecasters said, though the 50-degree daytime temperature should block any snow.
With the temperature dropping to 36 during the night, Monday has a chance of rain and snow showers, the NWS said, with a high of 41.