Get Exclusive App Deals

Chester County

Travel Info
More destinations

Chester County Weather, Climate and Best Time to Visit

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

3/16
Monday
Heavy rain
66.2°F/39.4°F
3/17
Tuesday
Moderate or heavy snow showers
40.3°F/26°F
3/18
Wednesday
Cloudy
36.7°F/23.5°F
3/19
Thursday
Partly Cloudy
48.4°F/28.6°F
3/20
Friday
Patchy rain nearby
53.9°F/33.4°F
3/21
Saturday
Patchy rain nearby
49.6°F/36.7°F
3/22
Sunday
Patchy rain nearby
68.5°F/38.7°F