The weather has not been cool enough to wear that scarf you’ve taken out of the closet or to grab that hot chocolate you’ve been dreaming about. (Full disclaimer: I still am sleeping with my air-conditioning on.)

Part of it is probably because you might remember that it was in the 60s last year at this time. But the actual explanation is that a mass of warm air has come in from the south , said Faye Morrone, a meteorologist with the National Weather Service.

This is supposed to last at least through the beginning of next week . So it’s not going to feel like fall for probably at least another seven days. But at least you can start putting out those Halloween decorations.

Fall weather is coming. It’s just not here yet.

New Yorkers should remember that fall is “a season of transition,” Ms. Morrone said.

It is not unusual for New York to experience periods of warm and cool weather during the beginning of the fall, she said.