CHESTER COUNTY, PA — Get ready for a weather rollercoaster this week, folks. Chester County kicks off Sunday with plenty of sunshine and temperatures flirting with the upper 70s — a final flirtation with summer warmth before fall remembers it’s supposed to be in charge. Expect a breezy afternoon, with south winds picking up to 15 to 20 mph, so maybe secure those Halloween decorations before they blow off into a neighbor’s yard.
Tonight, the weather takes a turn as a front moves in, bringing showers and the chance of late-night thunderstorms after 2 a.m. Temperatures will tumble to around 50 degrees, and rainfall could total up to half an inch. Keep the umbrella handy — and maybe skip washing the car today.
Monday starts damp but quickly redeems itself. A few morning showers will give way to clearing skies by afternoon as cooler, drier air rushes in. Expect a high near 62 with gusty west winds up to 30 mph, which could make it feel a touch brisker than it sounds. Monday night cools off sharply, dipping to around 42 under mostly clear skies — perfect sleeping weather if you like cracking the window open.
Tuesday looks like a beauty with sunshine and a mild high near 66, though clouds will sneak back in late. Showers are possible Tuesday night, but they should be light and scattered. By Wednesday through Saturday, we settle into a picture-perfect autumn rhythm: mostly sunny days, cool nights, and highs in the upper 50s to low 60s. Lows will hover in the upper 30s to low 40s — crisp enough to remind you that cider season is in full swing.
So enjoy the sunshine while it lasts, and don’t let those gusty winds blow away your pumpkin display.
For more detailed forecasts and live updates, visit the MyChesCo Weather Center.
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