Reading, Pennsylvania 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

773
FXUS61 KPHI 050314
AFDPHI

Area Forecast Discussion
National Weather Service Mount Holly NJ
1114 PM EDT Sat Jul 4 2026

.WHAT HAS CHANGED...
Heat Advisories have been issued for Sunday in many areas.

Updated Aviation section.

Severe Thunderstorm Watch #459 has been expired for the area.

&&

.KEY MESSAGES...
1. The worst of the dangerous heat has passed, but still some
heat related concerns for Sunday.

2. Rounds of showers and thunderstorms Sunday and Sunday night
may produce some severe weather and flash flooding.

&&

.DISCUSSION...
KEY MESSAGE 1...The worst of the dangerous heat has passed, but
still some heat related concerns for Sunday.

The Excessive Heat Warnings were cancelled earlier as the rains
and thunderstorms have brought cooler air to the forecast area.
For Sunday, we will still have high humidity across the area and
with the daytime heating, we`ll still have heat index values
climb into the upper 90s to low 100s across most areas (save
the Southern Poconos and Sussex County NJ). Heat illness will
remain a concern with the multiple day nature of the recent
stretch so even though the heat values will be lower we still
expect some effects from the heat. The Heat Advisory will be in
effect from 8AM until 8PM.

By Monday, with a frontal boundary draped across the area, much cooler
temperatures are expected. Placement of the front is uncertain, but
north of the front temperatures will likely only be in the mid 70s,
and low to mid 80s to the south. South of the front where temperatures
are still fairly warm, the forecast remains complicated by the potential
for widespread showers and storms.

KEY MESSAGE 2...Rounds of showers and thunderstorms Sunday and Sunday
night may produce some severe weather and flash flooding.

On Sunday, the severe weather threat is generally anticipated
to remain from mainly the Philly metro and points south, but
this will be dependent on frontal placement. However, widespread
showers and storms are also expected north of the front. In
fact, model guidance is indicating PWATs potentially exceeding 2
inches, which is above the 90th percentile for this time of
year and near the daily observed maximum. CAPE also looks to be
tall and "skinny", another setup that favors heavy rainfall.
Given these factors, rainfall rates in storms could exceed 1 to
2 inches per hour and it`s possible storms may also train over
the same areas. The WPC has continues to indicated a Slight Risk
(2 of 4) for the I-95 corridor and points west both Sunday and
Monday, with a Marginal Risk (1 of 4) for the remainder of the
area. Storms could last into a good portion of the night Sunday
night. The severe threat should diminish by the overnight but
the flash flood threat may continue.

Unfortunately the aformentioned front is likely to remain stalled
near the area Monday as an upper level trough approaches from
the west. This will lead to additional widespread showers and
storms. The severe weather threat looks to be lower by this time
but the flash flood threat will remain elevated, especially
since the same areas have the potential of being hit with
multiple rounds of showers/storms over successive days.

Even into next Tuesday there could be more showers and storms before
the front should finally push south of the area by Wednesday
leading to the weather trending drier.

&&

.AVIATION /02Z SUNDAY THROUGH THURSDAY/...
The following discussion is for KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY and surrounding areas.

Overnight... Showers continue at many terminals and a few TSTMs
too especially across NJ. These rains and some lower CIGS/VSBYs
will end overnight but some mist/fog will linger until dawn.

Sunday... VFR most of the day. Showers and TSTMs with lower
conditions expected for the late afternoon W/NW and for the
Delaware Valley and South NJ for the evening and overnight.
MVFR/IFR probable in rains and TSTMs.

Outlook...

Sunday through Monday night...Scattered to widespread showers
and thunderstorms with sub-VFR conditions expected at times.

Tuesday through Wednesday...Primarily VFR. Isolated to
scattered showers and storms will be possible, especially in the
afternoon hours each day, which could lead to brief periods of
sub-VFR conditions.

&&

.MARINE...
Showers and thunderstorms will end across the waters overnight.
Winds will remain mostly South to Southwest around 10 knots. Any
TSTM will locally cause higher winds and seas. Local fog is
possible. More showers and thunderstorms are expected Sunday
with severe weather possible.

Outlook...

No marine headlines are currently anticipated through Wednesday,
with winds below 25 kt and seas remaining below 5 ft. Relatively
benign boating conditions are expected outside of thunderstorms.
However, a cold front drops into the area then stalls and slowly
weakens over the local waters. That front will be the focus for
additional showers and storms possible each day through Tuesday,
with activity being the most widespread Sunday afternoon/evening
and again on Monday afternoon. Reduced visibility and strong winds
remain possible with the strongest storms.

Winds back to the E-NE behind the front tomorrow afternoon and
evening through midweek. This will build seas slightly Monday
afternoon through Wednesday, especially north of Barnegat Light,
though again remaining below 5 ft.

Rip Currents...

For Sunday, winds will be from the east around 10 mph with gusts up
to 15 mph in the afternoon. Breaking waves will be around 1-2 feet
or less. There will be a weak southeast swell with a period around 8
seconds. This results in a LOW risk for the development of dangerous
and life threatening rip currents at the Jersey Shore and at
Delaware Beaches.

For Monday, winds remain east around 10 to 15 kt, with gusts to 20
kt in the afternoon. Resulting increasing NE wind wave could drive
an elevated MODERATE Rip Current Risk along the Jersey Shore, with
LOW risk persisting over the Delaware Beaches.

For specific beach forecasts, visit weather.gov/beach/phi

&&

.CLIMATE...
There were some Record High temperatures across the area
Saturday.

All Time Record High Temperatures

Site                  Record / Date
Allentown (ABE)          105 / July 3, 1966
AC Airport (ACY)         106 / June 28, 1969
AC Marina (55N)          104 / August 7, 1918
Georgetown (GED)         104 / July 22 & 23, 2011
Mount Pocono (MPO)       103 / July 3, 1911
Philadelphia (PHL)       106 / August 7, 1918
Reading (RDG)            106 / July 22, 2011
Trenton (TTN)            106 / July 9, 1936 & July 22, 2011
Wilmington (ILG)         107 / August 7, 1918

All Time Record Warmest Low Temperatures

Site                  Record / Date
Allentown (ABE)           79 / July 15, 1995
AC Airport (ACY)          84 / July 23, 2011
AC Marina (55N)           82 / July 21, 2019
Georgetown (GED)          84 / July 23, 2011
Mount Pocono (MPO)        76 / July 12, 1952
Philadelphia (PHL)        83 / July 24, 2010 & July 23, 2011
Reading (RDG)             81 / August 7, 1918
Trenton (TTN)             84 / August 11, 1895
Wilmington (ILG)          84 / August 7, 1918

Record Number of Consecutive 100+ Degree Days

Site                  Record / Date
Allentown (ABE)       3 days / July 9-11, 1936 & July 2-4, 1966
AC Airport (ACY)      3 days / July 2-4, 1966 & July 22-24, 2011
AC Marina (55N)        1 day / Occurred multiple times
Georgetown (GED)      2 days / Most recent June 24-25, 2025
Mount Pocono (MPO)     1 day / July 3, 1911
Philadelphia (PHL)    3 days / July 2-4, 1966 & July 8-10, 1993
Reading (RDG)         3 days / Most recent July 21-23, 2011
Trenton (TTN)         3 days / Most recent July 21-23, 2011
Wilmington (ILG)      3 days / Most recent July 9-11, 1936

Record High Temperatures
                          July 4
Site                  Record / Year
Allentown (ABE)          102 / 1949
AC Airport (ACY)         102 / 1966
AC Marina (55N)           99 / 1966
Georgetown (GED)         100 / 1966
Mount Pocono (MPO)        99 / 1911
Philadelphia (PHL)       103 / 1966
Reading (RDG)            100 / 1911 & 1966
Trenton (TTN)             99 / 1919, 1999, & 2010
Wilmington (ILG)         102 / 1966

Record Warmest Low Temperatures
                          July 4
Site                  Record / Year
Allentown (ABE)           75 / 1999
AC Airport (ACY)          75 / 1974, 1983, 1999, & 2002
AC Marina (55N)           79 / 2002
Georgetown (GED)          75 / 1999 & 2012
Mount Pocono (MPO)        70 / 2002 & 2013
Philadelphia (PHL)        79 / 1919
Reading (RDG)             78 / 1966
Trenton (TTN)             78 / 1966
Wilmington (ILG)          76 / 1999

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...Heat Advisory from 8 AM to 8 PM EDT Sunday for PAZ060>062-070-
     071-101>106.
NJ...Heat Advisory from 8 AM to 8 PM EDT Sunday for NJZ007>010-
     012>027.
DE...Heat Advisory from 8 AM to 8 PM EDT Sunday for DEZ001>004.
MD...Heat Advisory from 8 AM to 8 PM EDT Sunday for MDZ012-015-019-
     020.
MARINE...None.

&&

$$

DISCUSSION...Fitzsimmons/MPS/Staarmann/OHara
AVIATION...Fitzsimmons/RCM/OHara
MARINE...Fitzsimmons/MPS/RCM