Patchy fog is expected during the Monday overnight hours, with Tuesday looking at partly sunny skies, with a slight chance for showers and thunderstorms, forecasters say.

Patchy fog and some haze are most likely to develop after midnight into early Tuesday the further east you go into Suffolk County, said Jay Engle, National Weather Service meteorologist in Upton.

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Better settle in to the notion of “warm and humid” for the whole week, which also brings “spotty showers and storms,” said Rich Hoffman, News 12 Long Island meteorologist.

Tuesday is forecast to be similar to Monday, Engle said, with partly sunny skies for the most part and seasonable temperatures in the low 80s, feeling warmer thanks to the humidity.

Wednesday is mostly sunny, also with a slight chance of showers and thunderstorms, and heading up to the mid-80s.