A spring setback is bringing chilly air, rain, and sharp temperature swings across the northeastern U.S. this weekend. A cold front moving from New England to the mid-Atlantic will split the region between 40s–50s in the north and 70s–80s farther south before cooler air takes over. Periods of rain and drizzle will linger into Saturday, with some areas even seeing brief frost. Conditions may improve by Sunday, but clouds and damp weather could stick around.