Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Chester County Airport (KMQS)

Lat: 39.98°NLon: 75.87°WElev: 659ft.

Fair

74°F

23°C

Humidity	61%
Wind Speed	NE 6 mph
Barometer	30.11 in
Dewpoint	60°F (16°C)
Visibility	10.00 mi
Last update	21 Aug 12:35 pm EDT

More Information:

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

Extended Forecast for

Downingtown PA

This Afternoon
High: 80 °F
Mostly Sunny
Tonight
Low: 63 °F
Increasing
Clouds
Saturday
High: 76 °F
Heavy Rain
Saturday Night
Low: 63 °F
Chance
Showers
Sunday
High: 81 °F
Chance
T-storms
Sunday Night
Low: 60 °F
Chance
Showers then
Clear
Monday
High: 78 °F
Sunny
Monday Night
Low: 59 °F
Mostly Clear
Tuesday
High: 78 °F
Sunny

Detailed Forecast

This Afternoon

Mostly sunny, with a high near 80. Northeast wind around 5 mph.

Tonight

Increasing clouds, with a low around 63. Calm wind.

Saturday

Showers likely before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 76. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 63. East wind around 5 mph becoming calm. Chance of precipitation is 40%. New precipitation amounts between a half and three quarters of an inch possible.

Sunday

A slight chance of showers, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 81. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday Night

A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 60. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday

Sunny, with a high near 78.

Monday Night

Mostly clear, with a low around 59.

Tuesday

Sunny, with a high near 78.

Tuesday Night

Mostly clear, with a low around 61.

Wednesday

Mostly sunny, with a high near 81.

Wednesday Night

A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.