Chester County, PA Weather Forecast
County weather hub
Sunny
Compare major city weather across Chester County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Sunny, with a high near 77.
County Weather Overview
This county weather page brings together forecast coverage for Chester County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 22 of 22 mapped cities in Chester County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 24 to Aug 27, 2026
- Latest sync
- Aug 21, 2026 5:36 AM EDT
- Forecast office
- PHI
- Source
- NOAA / NWS
Daily Outlook
This Week in Chester County
Wednesday looks like the warmest upcoming period in Chester County at 82 degrees F.
Monday Night is the coolest period ahead with temperatures near 58 degrees F.
The strongest winds are forecast for Monday at about 5 to 10 mph W.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 21, 2026 5:36 AM EDT
- Coverage
- 4 days
- Time zone
- America/New_York
- Forecast office
- PHI
- Radar station
- KDIX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 58.
A slight chance of rain showers after 2pm. Sunny, with a high near 78.
A slight chance of rain showers before 8pm. Mostly clear, with a low around 60.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 82.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Monday
Aug 24
|
Sunny
|
77°F |
5 to 10 mph
W
|
|
Monday Night
Aug 24
|
Mostly Clear
|
58°F |
5 mph
W
|
|
Tuesday
Aug 25
|
Sunny then Slight Chance Rain Showers
|
78°F |
5 mph
NW
|
|
Tuesday Night
Aug 25
|
Slight Chance Rain Showers then Mostly Clear
|
60°F |
0 to 5 mph
W
|
|
Wednesday
Aug 26
|
Mostly Sunny then Chance Showers And Thunderstorms
|
82°F |
0 to 5 mph
SW
|
|
Wednesday Night
Aug 26
|
Chance Showers And Thunderstorms
|
65°F |
0 to 5 mph
S
|
|
Thursday
Aug 27
|
Chance Rain Showers
|
82°F |
5 mph
SE
|
Major City Forecasts
Live forecast snapshots for major cities across Chester County.
Coverage
Forecast coverage currently spans 22 of 22 mapped cities in Chester County.
Largest mapped city population in this region: 20,048.
