A nasty rainstorm could bring a wintry mix of snow and sleet to the Big Apple on Sunday and Monday, forecasts show.

Rain will fall starting Sunday morning and there’s “a fairly good chance we could see some sleet” then, as well as “a little bit of snow” on Monday as the storm comes to an end, AccuWeather senior meteorologist Alan Reppert told The Post Friday.

Even if the storm does bring some snow with it, “it’s not going to accumulate,” as high temperatures will remain above freezing with a predicted 40 degrees for Sunday and 37 degrees for Monday, Reppert said.

The meteorologist added that areas to the north and west of the city have “more of a chance for snow” starting Sunday and continuing into Monday.

Upstate towards Binghamton could see up to a foot of snow, while northern parts of New Jersey could see between three and six inches of snow, according to Reppert.

The National Weather Service issued a hazardous weather outlook for much of the tri-state area as the slow-moving low-pressure system rolls in.