Dangerous Heat and Humidity Today through Saturday

Dangerously hot and humid conditions are expected to build starting today through Saturday. Additionally, there will be a threat of thunderstorms on some of the days. View this briefing for details. Read More >

Hazardous Weather Conditions

Current conditions at

Philadelphia - Wings Field Airport (KLOM)

Lat: 40.14°NLon: 75.27°WElev: 282ft.

Fair

93°F

34°C

Humidity	55%
Wind Speed	NW 7 mph
Barometer	30.01 in
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	104°F (40°C)
Last update	1 Jul 1:55 pm EDT

More Information:

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

Extended Forecast for

Lafayette Hill PA

Extreme Heat Warning July 1, 02:09pm until July 4, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning July 1, 02:09pm until July 4, 08:00pm
NOW until 8:00pm Sat
Extreme Heat Warning
This Afternoon
High: 98 °F
Severe
Thunderstorms
Tonight
Low: 76 °F
Severe
Thunderstorms
then Mostly
Clear
Thursday
High: 103 °F
Hot
Thursday Night
Low: 80 °F
Mostly Clear
Friday
High: 103 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 78 °F
Chance
T-storms
Independence Day
High: 101 °F
Sunny then
Chance
T-storms
Saturday Night
Low: 75 °F
Chance
T-storms

Detailed Forecast

This Afternoon

Isolated showers and thunderstorms after 3pm. Some of the storms could be severe. Mostly sunny and hot, with a high near 98. Heat index values as high as 106. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Tonight

Isolated showers and thunderstorms before 10pm. Some of the storms could be severe. Partly cloudy, with a low around 76. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.

Thursday

Sunny and hot, with a high near 103. Heat index values as high as 110. West wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday Night

Mostly clear, with a low around 80. Southwest wind around 5 mph.

Friday

A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 103. Light west wind increasing to 5 to 10 mph in the morning. Chance of precipitation is 20%.

Friday Night

A chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 78. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Independence Day

A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 101. Chance of precipitation is 30%.

Saturday Night

A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 40%.

Sunday

Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 96. Chance of precipitation is 60%.

Sunday Night

Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 72. Chance of precipitation is 70%.

Monday

Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 90. Chance of precipitation is 60%.

Monday Night

Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.