Allentown, Pennsylvania Weather Conditions

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Current Conditions

  • 63°
  • Clear
  • Wind: Calm
  • Humidity: 77%
  • Visibility: 10.0 miles
  • Dew Point: 55°
  • Pressure: 30.07 in. 0

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Next 12 Hours

8  am
11  am
2  pm
5  pm
8  pm
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
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64°
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77°
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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 81 °
  • Low: 59 °
  • Partly Cloudy
  • Thursday
  • Chance of a Thunderstorm
  • High: 82 °
  • Low: 63 °
  • Chance of T-Storms
  • Friday
  • Chance of a Thunderstorm
  • High: 82 °
  • Low: 59 °
  • Chance of T-Storms
  • Saturday
  • Mostly Cloudy
  • High: 81 °
  • Low: 64 °
  • Mostly Cloudy
  • Sunday
  • Chance of a Thunderstorm
  • High: 79 °
  • Low: 64 °
  • Chance of T-Storms

Forecast for Allentown, Pennsylvania

Updated: 5:00 AM EDT on July 30, 2014

  • Wednesday

    Partly cloudy. High of 81F. Winds from the West at 5 to 10 mph.

  • Wednesday Night

    Partly cloudy. Low of 59F. Winds less than 5 mph.

  • Thursday

    Partly cloudy with a chance of rain, then a chance of a thunderstorm and a chance of rain in the afternoon. High of 82F. Winds from the SSW at 5 to 10 mph. Chance of rain 40%.

  • Thursday Night

    Partly cloudy with a chance of rain. Low of 63F. Winds less than 5 mph. Chance of rain 30%.

  • Friday

    Partly cloudy with a chance of rain, then a chance of a thunderstorm and a chance of rain in the afternoon. High of 82F. Winds from the South at 5 to 10 mph. Chance of rain 50%.

  • Friday Night

    Mostly cloudy with a chance of a thunderstorm and rain in the evening, then overcast. Low of 59F. Winds less than 5 mph. Chance of rain 20%.

  • Saturday

    Overcast in the morning, then mostly cloudy. Fog early. High of 81F. Winds from the ESE at 5 to 10 mph.

  • Saturday Night

    Mostly cloudy in the evening, then overcast with a chance of a thunderstorm and rain. Fog overnight. Low of 64F. Winds from the SE at 5 to 10 mph shifting to the ENE after midnight. Chance of rain 60% with rainfall amounts near 0.6 in. possible.

  • Sunday

    Overcast with a chance of rain, then a chance of a thunderstorm and rain in the afternoon. High of 79F. Winds less than 5 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

  • Sunday Night

    Overcast with a chance of a thunderstorm. Fog overnight. Low of 64F. Winds less than 5 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.

  • Monday

    Mostly cloudy with a chance of a thunderstorm. High of 82F. Winds less than 5 mph. Chance of rain 40%.

  • Monday Night

    Mostly cloudy. Low of 66F. Winds less than 5 mph.

  • Tuesday

    Partly cloudy. High of 84F. Winds less than 5 mph.

  • Tuesday Night

    Partly cloudy. Low of 64F. Winds less than 5 mph.

  • Wednesday

    Overcast. High of 82F. Winds less than 5 mph.

  • Wednesday Night

    Partly cloudy. Fog overnight. Low of 64F. Winds less than 5 mph.

  • Thursday

    Partly cloudy. High of 81F. Winds less than 5 mph.

  • Thursday Night

    Clear. Fog overnight. Low of 63F. Winds less than 5 mph.

  • Friday

    Partly cloudy with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday

    Partly cloudy with a chance of a thunderstorm. High of 81F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 63F. Winds less than 5 mph. Chance of rain 20%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South Allentown, Allentown, PA

Updated: 9:07 AM EDT

Temperature: 67.5 °F Dew Point: 59 °F Humidity: 73% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Park Ridge, Allentown, PA

Updated: 9:05 AM EDT

Temperature: 69.3 °F Dew Point: 57 °F Humidity: 66% Wind: Calm Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Whitehall, Whitehall, PA

Updated: 9:05 AM EDT

Temperature: 63.9 °F Dew Point: 59 °F Humidity: 83% Wind: NW at 2.0 mph Pressure: 29.66 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hokendauqua, Whitehall, PA

Updated: 9:07 AM EDT

Temperature: 62.6 °F Dew Point: 57 °F Humidity: 82% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: West Bethlehem, Bethlehem, PA

Updated: 9:07 AM EDT

Temperature: 64.9 °F Dew Point: 56 °F Humidity: 74% Wind: SW at 2.7 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Werner Ent. Allentown, Allentown, PA

Updated: 9:07 AM EDT

Temperature: 63.8 °F Dew Point: 56 °F Humidity: 76% Wind: SSW at 3.0 mph Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: upper saucon township, Coopersburg, PA

Updated: 9:00 AM EDT

Temperature: 61.2 °F Dew Point: 56 °F Humidity: 82% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: West Allentown, Wescosville, PA

Updated: 9:05 AM EDT

Temperature: 62.3 °F Dew Point: 58 °F Humidity: 85% Wind: Calm Pressure: 30.05 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Windermerre Park, Allentown, PA

Updated: 9:05 AM EDT

Temperature: 64.5 °F Dew Point: 56 °F Humidity: 73% Wind: ESE at 2.0 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Macungie Area Weather, Macungie, PA

Updated: 9:07 AM EDT

Temperature: 62.4 °F Dew Point: 56 °F Humidity: 81% Wind: NW at 3.6 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Air Products Campus Wx, Allentown, PA

Updated: 9:07 AM EDT

Temperature: 62.3 °F Dew Point: 56 °F Humidity: 79% Wind: SW at 2.3 mph Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Strawberry Acres, Coplay, PA

Updated: 9:07 AM EDT

Temperature: 62.5 °F Dew Point: 57 °F Humidity: 83% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: whispering hollow south, Northampton, PA

Updated: 9:07 AM EDT

Temperature: 69.3 °F Dew Point: 23 °F Humidity: 17% Wind: Calm Pressure: 29.34 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Orchard View, Hellertown, PA

Updated: 9:07 AM EDT

Temperature: 65.3 °F Dew Point: 54 °F Humidity: 68% Wind: North at 3.6 mph Pressure: 29.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Orefield, PA

Updated: 9:00 AM EDT

Temperature: 64.5 °F Dew Point: 58 °F Humidity: 80% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Wassergass, Hellertown, PA

Updated: 9:07 AM EDT

Temperature: 66.1 °F Dew Point: 56 °F Humidity: 69% Wind: Calm Pressure: 30.02 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Fogelsville, PA

Updated: 9:07 AM EDT

Temperature: 61.7 °F Dew Point: 57 °F Humidity: 85% Wind: Calm Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Breinigsville / Lower Macungie, Mertztown, PA

Updated: 9:05 AM EDT

Temperature: 70.6 °F Dew Point: 60 °F Humidity: 68% Wind: WSW at 1.0 mph Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Springtown, PA, Springtown, PA

Updated: 9:07 AM EDT

Temperature: 64.7 °F Dew Point: 59 °F Humidity: 82% Wind: SSW at 2.0 mph Pressure: 30.07 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Washington Township, N3DL, Slatington, PA

Updated: 9:07 AM EDT

Temperature: 63.4 °F Dew Point: 59 °F Humidity: 87% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Eagles Landing, Nazareth, PA

Updated: 9:07 AM EDT

Temperature: 65.9 °F Dew Point: 52 °F Humidity: 61% Wind: North at 3.1 mph Pressure: 29.65 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Saratoga Chase, Breinigsville, PA

Updated: 8:55 AM EDT

Temperature: 63.5 °F Dew Point: 57 °F Humidity: 80% Wind: SW at 3.0 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Bath, PA

Updated: 9:07 AM EDT

Temperature: 66.3 °F Dew Point: 61 °F Humidity: 83% Wind: Calm Pressure: 30.03 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Harlem, Barto, PA

Updated: 8:53 AM EDT

Temperature: 60.7 °F Dew Point: 59 °F Humidity: 95% Wind: Calm Pressure: 30.06 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Mertztown, Mertztown, PA

Updated: 8:53 AM EDT

Temperature: 61.9 °F Dew Point: 56 °F Humidity: 82% Wind: WSW at 3.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Mount Holly New Jersey 
414 am EDT Wednesday Jul 30 2014 


Synopsis... 
a building area of high pressure over the western Atlantic will push 
a warm front towards the region this weekend. Multiple surface waves 
look to ride along this frontal boundary through the weekend. High 
pressure should make a return to the region early next week. 


&& 


Near term /until 6 PM this evening/... 
a middle level short wave trough should lift northeast through the day. 
The question is though, exactly how close will it come to the 
region. Both the NAM and GFS show the trough remaining northwest of 
the region as indicated by the q vector and vorticity fields at 850 
and 700 mb. In addition to the question of how close the trough will 
be to the region, there are a few other limiting factors for 
shower/thunderstorm development. First, the lift is limited to the 
middle levels, as there does not appear to be a reflection of this 
short wave trough at 500 mb. In addition, any upper level jets are 
well south and east of the region. Second, low level moisture, 
although slightly higher than yesterday is still limited, and thus 
will limit instability. 


As for temperatures...should see highs a few degrees higher than 
yesterday as cloud cover should be a bit more limited. 


&& 


Short term /6 PM this evening through 6 am Thursday/... 
the previously mentioned middle level short wave trough comes a little 
closer to the region through the evening hours, but still remains 
just northwest of the region. Instability after 00z is limited to 
meager elevated instability, so only expect isolated showers, if 
anything. Moisture continues to increase, so despite the light winds 
do not expect as much radiational cooling as Tuesday night, so should 
see temperatures a few degrees higher than Tuesday morning. 


Another shortwave trough begins to approach the region late tonight, 
and while it should stay west of the region through the tonight 
period, the combination of the height falls in advance of the 
trough, and weak elevated instability may be enough for some shower 
development around sunrise Thursday morning, primarily in the northwest 
portions of the region. 


&& 


Long term /Thursday through Tuesday/... 
no dramatic shifts in the guidance over the past 24 hours though it 
is becoming more apparent that there is a split amongst the NCEP vs. 
Non-NCEP guidance for this weekend. The dominate feature/driving 
force through the end of the work week. Thereafter, the stronger 
trough begins to break down with its closed low opening up and 
moving off towards the north and east over the weekend. A much more 
broad based trough remains overhead through the end of the period. 


Thursday...stronger shortwave interaction with increasing column 
moisture and better, not great, instability should lead to widely 
scattered showers and isolated thunderstorms...some as early as late 
morning. Increased probability of precipitation accordingly and sped up the timing of the 
showers during the day...sref probs and pqpf fields show this trend. 
Temperatures should end up being several degrees below normal with 
ample cloud cover and shower activity. 


Friday...deeper moisture advects into the region with ridging 
offshore building and heights across the East Coast beginning to 
increase. Better instability over the eastern sections of the County Warning Area 
with more middle-level impulse activity should lead to even more 
scattered convection during the peak heating hours. Weak surface 
convergence under a predominant south-southeast flow will aide in 
better lift for shower activity along the higher terrain. 
Temperatures should again end up cooler than normal. 


Saturday - Sunday...upper level jet dynamics come into play moreso 
than previous days with the right entrance region sitting across the 
mid-Atlantic. Offshore ridge continues to build and pushes the 
inverted trough closer towards the region, as a warm front of sorts. 
Numerous waves move along this baroclinic zone with various degrees 
of strength and speed. As stated above there is a split in the 
numerical guidance in regards to the timing and location of these 
waves. NCEP guidance has a slower approach than the non-NCEP members 
and also with their quantitative precipitation forecast fields. Not too prudent to rely on the quantitative precipitation forecast 
output still several days away, but the trend may be your 
friend...wetter solution for US this weekend. Still lots of 
uncertainty to work with though the GFS looks in line with the gefs 
while the ec and its ensemble members are in close agreement. We 
continue with the chance probability of precipitation given the uncertainty but have added 
moderate rain to the forecast with the amount of available moisture 
that could be tapped into. 


Monday - Tuesday...slight drying trend expected on Monday though not 
entirely void of any showers with cold air still aloft with a few 
more shortwaves shearing across overhead. High pressure should be 
nosing in by Tuesday to allow for better drying. More moisture and 
heat advects in and could push temperatures back to normal. 


&& 


Aviation /08z Wednesday through Sunday/... 
the following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, 
kmiv, kacy and surrounding areas. 


VFR conditions are expected through the taf period. Once 
again...should see scattered to possibly broken cumulus clouds around 050. 
There is a small risk of rain showers and thunderstorms and rain near kabe and krdg between 18 
and 03z...but coverage is expected to be very limited so no mention 
in the tafs for now. 


Expect southwesterly winds of 5 to 10kt through 00z, before winds 
once again become light and vrb. 


Outlook... 
Thursday - Friday...mostly VFR with scattered showers and 
thunderstorms possible each afternoon. Local sub-VFR conditions in 
showery activity. Medium confidence. 


Saturday - Sunday...mostly VFR. Possibility for widespread showers 
and thunderstorms each day creating MVFR/IFR conditions...some could 
be heavy. Medium confidence on possibility, low confidence with 
respect to coverage. 


&& 


Marine... 
expect winds and seas to remain below Small Craft Advisory today and 
tonight with winds staying below 15 knots and seas between 2 and 3 
feet. 


Outlook... 
Thursday - Sunday...sub-sca conditions are expected across our 
waters this period. 


&& 


Climate... 
record lows for Wednesday morning, July 30th. 


Philadelphia, PA....58 degrees set in 1981 and 1914. 
Wilmington, Delaware......55 degrees set in 1956. 
Allentown, PA.......50 degrees set in 1997 and 1968. 
Reading, PA.........52 degrees set in 1981. 
Atlantic City, New Jersey...53 degrees set in 1981 and 1968. 
Trenton, New Jersey.........54 degrees set in 1997. 
Georgetown, Delaware......54 degrees set in 1981. 
Mount Pocono, PA....42 degrees set in 1968. 


&& 


Phi watches/warnings/advisories... 
PA...none. 
New Jersey...none. 
Delaware...none. 
Maryland...none. 
Marine...none. 


&& 


$$ 
Synopsis...Heavener 
near term...Johnson 
short term...Johnson 
long term...Heavener 
aviation...Heavener/Johnson 
marine...Heavener/Johnson 
climate... 



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