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Chester County

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Chester County Weather and climate

Data source：Meteostat
Update date：2025-09

Chester County year round climate
  • Spring (March–May): Average 43–62°F, the climate gradually changes from cold to warm, with abundant rainfall, especially in April. Common activities: picnics, flower viewing, outdoor hiking. Recommended clothing: light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 70–75°F, hot and humid weather, relatively stable rainfall. Common activities: swimming, camping, outdoor barbecues. Recommended clothing: light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 66–46°F, the temperature changes from warm to cool, September has the most rainfall, then gradually becomes drier. Common activities: maple leaf viewing, fruit picking, outdoor cycling. Recommended clothing: comfortable long-sleeved shirts, light jackets, warm clothing (October–November).
  • Winter (December–February): Average 36–37°F, cold weather, relatively heavy rainfall, occasional snowfall. Common activities: indoor activities, skiing (requires traveling to higher altitudes), appreciating winter scenery. Recommended clothing: heavy coat, warm clothing, scarf, hat, gloves.
Chester County climatological average

Annual average temperature: approx. 54.5°F / Annual rainfall: approx. 1380 mm / Summer humidity: 65%–75% / Rainiest month: September

Chester County monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
33.8°F
117
February
37.6°F
56.1
March
43.7°F
111.9
April
53.2°F
140.5
May
62.2°F
88.5
June
70.2°F
131.9
July
75.9°F
134.5
August
73.2°F
102.2
September
66.2°F
175.5
October
55.8°F
85.1
November
46.2°F
72.1
December
36.9°F
164.7
Chester County weather for the next seven days
10/31
Friday
Patchy rain nearby
52.2°F/44.1°F
11/1
Saturday
Sunny
56.6°F/43.7°F
11/2
Sunday
Partly Cloudy
57.1°F/40.4°F
11/3
Monday
Sunny
59.3°F/42.1°F
11/4
Tuesday
Moderate rain
61.4°F/44.2°F
11/5
Wednesday
Sunny
50.9°F/39.9°F
11/6
Thursday
Sunny
55°F/38.2°F

Chester County FAQ

What are some must-visit historical sites in Chester County, PA?
Chester County, PA is rich with history. You can explore the Brandywine Battlefield State Park, a significant site from the Revolutionary War, and immerse yourself in the charming architecture of historic Yellow Springs. Don't miss Valley Forge National Historical Park, which played a crucial role in American history.
What are the best outdoor activities and parks in Chester County, PA?
For outdoor enthusiasts, Chester County, PA offers beautiful natural landscapes. Marsh Creek State Park is perfect for hiking, boating, and fishing. Hibernia County Park features scenic trails and historical buildings. French Creek State Park is another excellent option for exploring diverse flora and fauna.
Where can I find unique shopping experiences in Chester County, PA?
Chester County, PA boasts charming towns with unique shopping opportunities. Explore the boutiques and artisan shops in West Chester, known for its vibrant downtown. Kennett Square offers a delightful mix of specialty stores and galleries. You can also discover antique shops and local crafts throughout the county.
What are some popular family-friendly attractions in Chester County, PA?
Families visiting Chester County, PA will find plenty to enjoy. The Elmwood Park Zoo provides an engaging experience with a variety of animals. Longwood Gardens, while breathtaking for all, also has areas designed to delight younger visitors. The Franklin Institute of Delaware, though technically just across the border, is a popular day trip for families in the region.
Can you recommend some charming towns to visit in Chester County, PA?
Chester County, PA is dotted with picturesque towns. West Chester, the county seat, offers a lively downtown with shops and restaurants. Kennett Square is famous for its mushroom farms and vibrant community. Downingtown provides a friendly atmosphere with access to parks and trails. Phoenixville charms with its historic architecture and growing arts scene.