Dangerous Heat and Humidity Through Saturday

Dangerously hot and humid conditions are expected to continue through Saturday. Additionally, there will be a threat of thunderstorms through Sunday. View this briefing for details. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until July 4, 08:00 PM EDT

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

92°F

33°C

Humidity	41%
Wind Speed	Vrbl 6 mph
Barometer	29.93 in (1012.7 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Heat Index	94°F (34°C)
Last update	4 Jul 11:53 am EDT

More Information:

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

Extended Forecast for

Langhorne PA

Extreme Heat Warning July 4, 11:56am until July 4, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning July 4, 11:56am until July 4, 08:00pm
NOW until 8:00pm Sat
Extreme Heat Warning
Independence Day
High: 99 °F
Heavy Rain
Tonight
Low: 73 °F
Heavy Rain
then Slight
Chance
T-storms
Sunday
High: 88 °F
Slight Chance
Showers then
Showers
Likely
Sunday Night
Low: 67 °F
T-storms then
Showers
Monday
High: 79 °F
Showers
Monday Night
Low: 65 °F
Showers
Likely
Tuesday
High: 81 °F
Showers
Likely
Tuesday Night
Low: 66 °F
Chance
Showers

Detailed Forecast

Independence Day

A chance of showers and thunderstorms, mainly after 5pm. Some of the storms could produce heavy rainfall. Mostly sunny and hot, with a high near 99. Heat index values as high as 104. West wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely, mainly before midnight, then a slight chance of thunderstorms after 5am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 88. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 8pm. Low around 67. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Monday

Showers and possibly a thunderstorm. High near 79. East wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Monday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Tuesday

Showers likely before 8am, then showers likely and possibly a thunderstorm between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 60%.

Tuesday Night

A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.

Wednesday

Partly sunny, with a high near 84.

Wednesday Night

Partly cloudy, with a low around 68.

Thursday

A chance of showers. Mostly sunny, with a high near 89. Chance of precipitation is 30%.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.

Friday

A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 40%.