The second weekend in April brings both the chance of snow for Saturday and a freeze watch for overnight into Sunday, forecasters say.

With a 90 percent chance for precipitation, look for snow or a rain/snow mix to start in the morning, switching to rain by midmorning, and back to light snow or that rain/snow mix by late afternoon into the evening, said Brian Ciemnecki, a National Weather Service meteorologist based in Upton.

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Precipitation should clear the area by midnight, he said, with less than half an inch of snow expected.

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Earlier in the day, forecasters expressed uncertainty over the potential for the heaviest band of snow to track farther north, closer to Long Island, but by late afternoon indicators pointed to the track staying to the south.

Saturday’s highs are expected in the low 40s, heading down to the upper 20s overnight, leading to the freeze watch that’s in effect from late Saturday through 10 a.m. Sunday. Coldest temperatures are expected for the hours leading up to dawn, the weather service said, with the cold blast killing sensitive plants left outdoors, unless they’re protected.

Sunday is looking to be sunny and dry, with highs in the mid-40s.

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More seasonable temperatures, with highs in the low to mid-50s, are expected into the workweek, the weather service said.