CHESTER COUNTY, PA — If your weather wish list includes a little bit of everything — heat, storms, sunshine, and the sweet smell of rain on pavement — this week’s forecast has your name on it. Chester County is in for a rollercoaster of a weather ride starting today, Sunday, July 27, 2025, with steamy highs, stormy lows, and a refreshing cooldown just in time for the weekend. Let’s break it down:
Sunday: Storms to Start the Show
Today comes with an 80% chance of showers and thunderstorms, especially after 3 p.m. While it won’t be a washout all day, you’ll definitely want to pack the umbrella if you’re out and about. Highs will reach a sticky 86°F with a gentle southwest breeze. Rainfall amounts could be modest — unless a thunderstorm gets feisty. Tonight, expect scattered storms before 10 p.m. and a warm, humid low around 72°F.
Monday & Tuesday: Hello, Heatwave
The sun returns with a vengeance. Monday and Tuesday will feel like someone turned the thermostat to “July Max.” Expect highs of 92°F and 94°F respectively, with barely a breeze to cut the heat. Winds stay light — just 5 mph at best — so prepare for that thick, still summer air. Overnight lows hover in the low 70s, so your AC may not get much rest either.
Wednesday: Still Hot, Then… Boom?
Wednesday keeps the hot streak alive with another scorcher near 94°F, but a chance of evening thunderstorms brings a potential cooldown — and some drama. There’s a 50% chance of storms after 8 p.m., so that backyard dinner might get rained out. Or at least provide some lightning entertainment.
Thursday: Storms Take the Stage
Break out the rain boots and maybe cancel any lawn work. Thursday is the soggiest day of the week, with showers likely and thunderstorms possible after 2 p.m. Highs dip to a more bearable 84°F, but you’ll want to watch the skies. The rain continues into the evening with a 60% chance of precipitation and a cooler overnight low around 64°F.
Friday & Saturday: Summer Perfection Returns
By Friday, we hit the summer jackpot. Sunshine returns, the humidity backs off, and highs drop to a crisp 79°F — perfect for just about anything outdoors. Friday night offers ideal sleeping weather at 60°F, and Saturday keeps the good vibes going with more sun and a high near 79°F. It’s the weekend weather we’ve all been waiting for.
The Takeaway
We’re kicking off the week with storms and turning up the heat fast, but hang in there — relief is on the horizon. By the weekend, Chester County will be serving up pure summer bliss. Until then, hydrate, find shade, and keep an eye on those skies.
☀️ Don’t get caught off guard — visit the MyChesCo Weather Center for the latest updates, live radar, and everything you need to stay one step ahead of the storm.
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