National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Tracking Weekend Storm Impacts

A storm and trailing cold front will continue to slowly move through the Gulf Coast and Southeast U.S. through this weekend with widespread rain showers and isolated thunderstorms. A fast-moving clipper storm may bring several inches of snow to the north-central Plains, Midwest, eastern Great Lakes, and Northeast regions this weekend. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Mostly Cloudy

28°F

-2°C

Humidity 100%
Wind Speed NW 3 mph
Barometer 30.05 in
Dewpoint 28°F (-2°C)
Visibility 8.00 mi
Last update 7 Dec 1:35 am EST
Extended Forecast for

Saint Peters PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 23. West wind around 5 mph becoming calm.

    Low: 23 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 38. Calm wind becoming south around 5 mph in the afternoon.

    High: 38 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 22. South wind 5 to 15 mph becoming northwest after midnight.

    Low: 22 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 28. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 28 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 10. North wind around 5 mph becoming calm in the evening.

    Low: 10 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.

    High: 42 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.

    Low: 31 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly cloudy, with a low around 23. West wind around 5 mph becoming calm.
Sunday
Partly sunny, with a high near 38. Calm wind becoming south around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 22. South wind 5 to 15 mph becoming northwest after midnight.
Monday
Mostly sunny, with a high near 28. North wind 10 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 10. North wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
A chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 30%.
Thursday
Partly sunny, with a high near 41.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 27. Chance of precipitation is 30%.
Friday
A chance of snow. Partly sunny, with a high near 37. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 19.
Saturday
Partly sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Saint Peters PA
 40.12°N 75.82°W (Elev. 600 ft)
Last Update:
7:59 pm EST Dec 6, 2025
Forecast Valid:
1am EST Dec 7, 2025-6pm EST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation