Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Partly Cloudy

78°F

26°C

Humidity	46%
Wind Speed	S 7 mph
Barometer	30.20 in
Dewpoint	55°F (13°C)
Visibility	9.00 mi
Heat Index	79°F (26°C)
Last update	24 Jul 1:55 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Downingtown PA

This Afternoon
High: 83 °F
Partly Sunny
Tonight
Low: 58 °F
Partly Cloudy
Saturday
High: 83 °F
Sunny
Saturday Night
Low: 60 °F
Mostly Clear
Sunday
High: 85 °F
Sunny
Sunday Night
Low: 64 °F
Mostly Clear
Monday
High: 86 °F
Mostly Sunny
then Chance
T-storms
Monday Night
Low: 66 °F
Chance
T-storms
Tuesday
High: 85 °F
Showers
Likely

Detailed Forecast

This Afternoon

Partly sunny, with a high near 83. Southeast wind around 5 mph.

Tonight

Partly cloudy, with a low around 58. South wind around 5 mph becoming calm in the evening.

Saturday

Sunny, with a high near 83. East wind around 5 mph.

Saturday Night

Mostly clear, with a low around 60. Southeast wind around 5 mph becoming calm in the evening.

Sunday

Sunny, with a high near 85. Calm wind becoming north around 5 mph.

Sunday Night

Mostly clear, with a low around 64.

Monday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 40%.

Monday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

Tuesday

A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.

Tuesday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.

Wednesday

Mostly sunny, with a high near 83.

Wednesday Night

Partly cloudy, with a low around 63.

Thursday

Sunny, with a high near 84.