CHESTER COUNTY, PA — As September draws to a close, Chester County is getting one last taste of summer warmth before autumn officially settles in. The week ahead brings sunny stretches, a few cloudy pauses, and steadily cooling temperatures that will have you reaching for both sunglasses and light sweaters. Here’s the full breakdown:
Sunday: A Sunny Send-Off
Today will be a beauty, with plenty of sunshine and highs near 81°F. Winds stay calm, shifting northwest around 5 mph. Tonight cools down to about 60°F, with mostly clear skies and patchy fog possible after 10 p.m. — watch out if you’re on late-night roads.
Monday & Tuesday: Clouds Drift In
Monday stays warm with a high near 81°F, though skies turn partly sunny. An easterly breeze at 5 mph keeps conditions mild. By Monday night, clouds build in and lows dip to 61°F.
Tuesday trends cooler and cloudier, with highs around 78°F under mostly cloudy skies. Winds turn light from the northeast. By nightfall, temperatures drop to a comfortable 54°F.
Wednesday & Thursday: The Cooldown Arrives
Wednesday ushers in a noticeable shift, with highs near 70°F and mostly sunny skies. Overnight lows tumble to 46°F, bringing that crisp autumn air.
Thursday continues the trend with sunshine and a high near 65°F — sweater weather at its finest. By night, temps dip again to 44°F, perfect for open windows and cozy blankets.
Friday & Saturday: Autumn Comfort Zone
Friday rebounds slightly, with mostly sunny skies and highs near 69°F. Overnight, expect mostly clear skies and lows near 46°F.
Saturday wraps up the week with sunny skies and highs near 73°F — warm enough for outdoor fun but with the unmistakable feel of fall in the air.
The Takeaway
This week starts with summer’s warmth but steadily cools into a classic early autumn pattern. Highs move from the low 80s into the upper 60s, while lows drop from the 60s to the mid-40s. Sunshine dominates most days, with only brief cloudy spells.
It’s a week for layering — short sleeves in the afternoon, sweaters in the evening, and maybe even that first hot cider of the season.
☀️ Stay ahead of the sunny spells and crisp nights — check the MyChesCo Weather Center for real-time updates, radar, and all the details you need to plan your week.
For the latest news on everything happening in Chester County and the surrounding area, be sure to follow MyChesCo on Google News and MSN.