Allentown, Pennsylvania Weather Conditions

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Current Conditions

  • 86°
  • Mostly Cloudy
  • Wind: South 8 mph
  • Humidity: 58%
  • Visibility: 10.0 miles
  • Dew Point: 70°
  • Pressure: 29.99 in. -
  • Heat Index: 90

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Next 12 Hours

2  pm
5  pm
8  pm
11  pm
2  am
Thunderstorm
T-storms
Thunderstorm
T-storms
Thunderstorm
T-storms
Partly Cloudy
Partly Cloudy
Clear
Clear
81°
86°
77°
75°
75°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Thunderstorm
  • High: 86 °
  • Low: 68 °
  • T-Storms
  • Tuesday
  • Chance of a Thunderstorm
  • High: 88 °
  • Low: 68 °
  • Chance of T-Storms
  • Wednesday
  • Partly Cloudy
  • High: 82 °
  • Low: 59 °
  • Partly Cloudy
  • Thursday
  • Partly Cloudy
  • High: 84 °
  • Low: 64 °
  • Partly Cloudy
  • Friday
  • Chance of a Thunderstorm
  • High: 88 °
  • Low: 72 °
  • Chance of a Thunderstorm

Forecast for Allentown, Pennsylvania

Updated: 11:00 AM EDT on September 01, 2014

  • Monday

    Overcast with a chance of a thunderstorm and rain showers, then thunderstorms and rain showers in the afternoon. High of 86F with a heat index of 91F. Winds from the WSW at 5 to 10 mph. Chance of rain 40% with rainfall amounts near 0.2 in. possible.

  • Monday Night

    Partly cloudy with thunderstorms and rain showers. Fog overnight. Low of 68F. Winds less than 5 mph. Chance of rain 20%.

  • Tuesday

    Partly cloudy in the morning, then overcast with a chance of a thunderstorm and a chance of rain. High of 88F. Winds from the WSW at 5 to 10 mph. Chance of rain 30%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 68F. Winds from the West at 5 to 10 mph. Chance of rain 40%.

  • Wednesday

    Clear in the morning, then partly cloudy. High of 82F. Winds from the NW at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 59F. Winds less than 5 mph.

  • Thursday

    Clear in the morning, then partly cloudy. High of 84F. Winds from the South at 5 to 10 mph.

  • Thursday Night

    Clear. Low of 64F. Winds from the South at 5 to 10 mph.

  • Friday

    Clear with a chance of a thunderstorm and rain in the morning, then partly cloudy. High of 88F. Winds from the SSW at 5 to 15 mph. Chance of rain 20%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm. Low of 72F. Winds from the SW at 5 to 10 mph. Chance of rain 20%.

  • Saturday

    Partly cloudy with a chance of a thunderstorm. High of 86F. Winds from the NNW at 5 to 15 mph. Chance of rain 40%.

  • Saturday Night

    Clear. Low of 57F. Winds from the North at 5 to 10 mph.

  • Sunday

    Partly cloudy. High of 75F. Winds less than 5 mph.

  • Sunday Night

    Clear. Low of 55F. Winds less than 5 mph.

  • Monday

    Partly cloudy. High of 77F. Winds from the NE at 5 to 10 mph shifting to the SE in the afternoon.

  • Monday Night

    Clear. Fog overnight. Low of 52F. Winds less than 5 mph.

  • Tuesday

    Mostly cloudy. High of 73F. Winds less than 5 mph.

  • Tuesday Night

    Partly cloudy. Fog overnight. Low of 55F. Winds less than 5 mph.

  • Wednesday

    Mostly cloudy with a chance of rain. High of 75F. Winds less than 5 mph. Chance of rain 40%.

  • Wednesday Night

    Mostly cloudy with a chance of a thunderstorm. Fog overnight. Low of 57F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. High of 77F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 57F. Winds less than 5 mph. Chance of rain 20%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South Filmore Street, Allentown, PA

Updated: 2:27 PM EDT

Temperature: 88.5 °F Dew Point: 77 °F Humidity: 69% Wind: NNE at 2.2 mph Pressure: 29.88 in Hourly Precipitation: - Heat Index: 101 °F Graphs

Location: South Allentown, Allentown, PA

Updated: 2:34 PM EDT

Temperature: 84.4 °F Dew Point: 74 °F Humidity: 71% Wind: WNW at 1.8 mph Pressure: 29.84 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Park Ridge, Allentown, PA

Updated: 2:30 PM EDT

Temperature: 88.2 °F Dew Point: 72 °F Humidity: 59% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Whitehall, Whitehall, PA

Updated: 2:30 PM EDT

Temperature: 89.8 °F Dew Point: 72 °F Humidity: 57% Wind: WSW at 2.0 mph Pressure: 29.54 in Hourly Precipitation: 0.00 in Heat Index: 98 °F Graphs

Location: Fountain Hill - Near ST Lukes hosp., Fountain Hill, PA

Updated: 2:34 PM EDT

Temperature: 88.3 °F Dew Point: 72 °F Humidity: 59% Wind: ESE at 6.9 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Lower Saucon Township, Bethlehem, PA

Updated: 2:34 PM EDT

Temperature: 86.4 °F Dew Point: 72 °F Humidity: 63% Wind: Calm Pressure: 29.75 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: West Bethlehem, Bethlehem, PA

Updated: 2:34 PM EDT

Temperature: 89.1 °F Dew Point: 72 °F Humidity: 58% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 97 °F Graphs

Location: Emmaus, Emmaus, PA

Updated: 2:22 PM EDT

Temperature: 84.2 °F Dew Point: 75 °F Humidity: 75% Wind: WNW at 2.2 mph Pressure: 29.84 in Hourly Precipitation: - Heat Index: 93 °F Graphs

Location: South Mountain, Bethlehem, PA

Updated: 2:20 PM EDT

Temperature: 87.1 °F Dew Point: 77 °F Humidity: 72% Wind: South at 1.6 mph Pressure: 29.92 in Hourly Precipitation: - Heat Index: 99 °F Graphs

Location: upper saucon township, Coopersburg, PA

Updated: 2:30 PM EDT

Temperature: 81.5 °F Dew Point: 73 °F Humidity: 76% Wind: Calm Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: West Allentown, Wescosville, PA

Updated: 2:30 PM EDT

Temperature: 82.7 °F Dew Point: 75 °F Humidity: 77% Wind: SSW at 1.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Upper Macungie Twp, Allentown, PA

Updated: 2:28 PM EDT

Temperature: 84.6 °F Dew Point: 74 °F Humidity: 71% Wind: NW at 4.7 mph Pressure: 29.84 in Hourly Precipitation: - Heat Index: 92 °F Graphs

Location: Windermerre Park, Allentown, PA

Updated: 2:34 PM EDT

Temperature: 84.7 °F Dew Point: 72 °F Humidity: 65% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Schnecksville, PA

Updated: 2:30 PM EDT

Temperature: 83.9 °F Dew Point: 74 °F Humidity: 72% Wind: West at 3.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Macungie Area Weather, Macungie, PA

Updated: 2:34 PM EDT

Temperature: 82.9 °F Dew Point: 72 °F Humidity: 70% Wind: WSW at 3.1 mph Pressure: 29.98 in Hourly Precipitation: 0.00 in Heat Index: 88 °F Graphs

Location: Air Products Campus Wx, Allentown, PA

Updated: 2:34 PM EDT

Temperature: 83.0 °F Dew Point: 73 °F Humidity: 71% Wind: SW at 3.2 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Strawberry Acres, Coplay, PA

Updated: 2:33 PM EDT

Temperature: 83.7 °F Dew Point: 72 °F Humidity: 69% Wind: SW at 5.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: whispering hollow south, Northampton, PA

Updated: 2:34 PM EDT

Temperature: 90.9 °F Dew Point: 27 °F Humidity: 10% Wind: ESE at 3.0 mph Pressure: 29.28 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Bethlehem Township, Bethlehem, PA

Updated: 2:34 PM EDT

Temperature: 89.1 °F Dew Point: 71 °F Humidity: 56% Wind: SW at 2.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 96 °F Graphs

Location: Orefield, PA

Updated: 2:30 PM EDT

Temperature: 86.0 °F Dew Point: 74 °F Humidity: 67% Wind: WNW at 1.0 mph Pressure: 29.72 in Hourly Precipitation: 0.00 in Heat Index: 94 °F Graphs

Location: Wassergass, Hellertown, PA

Updated: 2:34 PM EDT

Temperature: 86.7 °F Dew Point: 72 °F Humidity: 62% Wind: SSW at 3.5 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 93 °F Graphs

Location: Fogelsville, PA

Updated: 2:34 PM EDT

Temperature: 86.0 °F Dew Point: 75 °F Humidity: 69% Wind: Calm Pressure: 29.75 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Jamesville, Bath, PA

Updated: 2:34 PM EDT

Temperature: 87.4 °F Dew Point: 75 °F Humidity: 66% Wind: South at 4.3 mph Pressure: 29.80 in Hourly Precipitation: - Heat Index: 97 °F Graphs

Location: Pointe West, Fogelsville, PA

Updated: 2:33 PM EDT

Temperature: 86.4 °F Dew Point: 75 °F Humidity: 68% Wind: WSW at 1.3 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 95 °F Graphs

Location: Upper Milford Twsp, Zionsville, PA

Updated: 2:30 PM EDT

Temperature: 82.0 °F Dew Point: 76 °F Humidity: 83% Wind: SE at 1.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: Breinigsville / Lower Macungie, Mertztown, PA

Updated: 2:30 PM EDT

Temperature: 84.5 °F Dew Point: 74 °F Humidity: 70% Wind: SW at 5.0 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 92 °F Graphs

Location: Kefallonia Drive, Hellertown, PA

Updated: 2:30 PM EDT

Temperature: 86.7 °F Dew Point: 74 °F Humidity: 65% Wind: South at 2.7 mph Pressure: 29.87 in Hourly Precipitation: - Heat Index: 95 °F Graphs

Location: Springtown, PA, Springtown, PA

Updated: 2:33 PM EDT

Temperature: 84.9 °F Dew Point: 72 °F Humidity: 66% Wind: SW at 6.0 mph Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Washington Township, N3DL, Slatington, PA

Updated: 2:34 PM EDT

Temperature: 84.7 °F Dew Point: 72 °F Humidity: 68% Wind: Calm Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: Saratoga Chase, Breinigsville, PA

Updated: 2:21 PM EDT

Temperature: 83.4 °F Dew Point: 73 °F Humidity: 71% Wind: WSW at 3.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Heat Index: 89 °F Graphs

Location: Harlem, Barto, PA

Updated: 2:26 PM EDT

Temperature: 79.3 °F Dew Point: 76 °F Humidity: 90% Wind: Calm Pressure: 29.96 in Hourly Precipitation: 0.00 in Heat Index: 84 °F Graphs

Location: Mertztown, Mertztown, PA

Updated: 2:21 PM EDT

Temperature: 82.0 °F Dew Point: 73 °F Humidity: 74% Wind: WSW at 4.0 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Heat Index: 87 °F Graphs

Location: Stunningly Beautiful Lehigh Valley, Palmer, PA

Updated: 2:34 PM EDT

Temperature: 86.5 °F Dew Point: 62 °F Humidity: 44% Wind: Calm Pressure: 29.65 in Hourly Precipitation: 0.00 in Heat Index: 87 °F 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 
1155 am EDT Monday Sep 1 2014 


Synopsis... 
high pressure well off the East Coast will maintain a southwesterly 
flow over the region through Tuesday. A cold front is then expected to 
move across the area late Tuesday and early Wednesday. High 
pressure will build in behind this front beginning Wednesday 
afternoon. Another cold front could approach from the west Friday 
night before stalling to our south next weekend. 


&& 


Near term /until 6 PM this evening/... 
the forecast area this morning remains under west/SW flow aloft... 
although surface winds are rather weak. The air mass is very warm and 
moist and has become moderately unstable with diurnal heating. 
Heating looks best generally S of phl where more clearing is noted 
on vsbl Sat loop. Considerable middle-level cloudiness continues to the north. 
Precipitable waters  remain over 2 inches as indicated both by morning radiosonde observations and 
the blended tpw Sat imagery. 


Forecast maximum temperatures for this afternoon mainly in the middle to upper 80s appear 
to be on track. However...dewpoints in the low or even middle 70s will 
raise the apparent temperatures by several degrees and add considerably 
to discomfort outside. Doesnt feel much like the beginning of 
meteorological autumn. 


In spite of the heat, moisture and instability...there doesn't 
seem to be much organized forcing for convection this afternoon. A weak 
shortwave appears to be moving by in the SW flow but it may be too 
far along already to have much effect. With these conds...expect 
just scattered convection to develop here and there this afternoon. 
Some higher res model guidance is suggesting better chances for 
thunderstorms over Delaware-Maryland-Virginia and far S New Jersey. 


&& 


Short term /6 PM this evening through 6 am Tuesday/... 
as the upper-level ridge starts to shift a bit westward, the flow 
aloft across the middle Atlantic may start to turn from southwest to 
westerly ahead of an amplifying upper-level trough diving across the 
Great Lakes region. While there are some short waves still embedded 
in this flow, the stronger ones appear to have shifted east with 
perhaps even some negative vorticity advection overspreading the area. 


As a result, any lingering convection should weaken and dissipate 
during the evening as the instability wanes and any appreciable 
forcing exits the area. We should then thin out the cloudiness, 
which combined with light winds and a humid airmass will probably 
result in some fog. At this point, we added patchy fog toward 
morning. The western zones could have some increase in clouds late 
as an upper-level trough starts to approach from the west. 


As for low temperatures, we used an even blend of the NAM/GFS MOS 
overall although some minor tweaks were then made. A warm and muggy 
night is expected for the area. 


&& 


Long term /Tuesday through Sunday/... 
Tuesday...after some patchy morning fog...skies should become 
partly to mostly sunny with highs in the upper 80s and low 90s, 
and heat index values will be even higher given dewpoints are 
expected to hover in the low 70s thanks to the continuing 
southwest flow. Cloudiness will be on the increase late in the 
day, as will be the pops, as a cold front approaches from the 
west. 


Tuesday night...models still indicate a cold front arriving 
during the evening hours, then crossing the coastal waters by morning. 
While temperatures behind this front won't be dramatically cooler, 
the dewpoints will be lower, so the air will begin to feel more 
comfortable. There will be a chance of showers and storms ahead 
of and with the front, however with a zonal flow expected in the 
middle levels of the atmosphere, and modest dry air advection 
occurring ahead of the front, moisture availability will be 
somewhat questionable. 


Wednesday through Friday...high pressure builds over the region in the 
wake of the cold front. As a result expect a few, nice, Summer- 
like days with highs in the 80s. 


Saturday through Sunday...the next cold front is set to arrive 
over the weekend. Though there is some question with the continued 
zonal flow how far south the front will dig, both the GFS and 
European model (ecmwf) have been consistent in showing the front moving south of 
our region through this period. 


&& 


Aviation /16z Monday through Friday/... 
the following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, 
kmiv, kacy and surrounding areas. 


Today...mostly VFR...as earlier fog and low stratus have now 
lifted. Some showers and thunderstorms are anticipated especially 
from midday on, however these may tend to be scattered. As a 
result, we indicated light showers with no thunder mentioned for 
now. Light SW winds are expected, around 5 to 10 knots. 


Tonight...some showers and thunderstorms to start, however these 
should dissipate during the evening. Otherwise, VFR much of the 
night with clouds tending to thin out. There should be some fog 
overnight, resulting in local MVFR/IFR visibilities. Southwest winds 
near 5 knots, becoming light and variable or even calm. 


Outlook... 
Tuesday and Tuesday night...conditions improving to VFR early in the 
day. Some showers and thunderstorms possible late Tuesday afternoon 
and Tuesday evening, along with an abrupt wind shift as a cold front 
moves through the region. 


Wednesday through Friday...generally VFR conditions expected. 


Friday night and Saturday...another cold front is expected to 
approach from the west. IFR conditions possible. 


&& 


Marine... 
high pressure located to our east will maintain a southwesterly flow 
of warm and humid air across the region through tonight. While the 
flow is forecast to be less today compared to yesterday, the 
southerly component will keep the seas up some. These have 
approached 5 feet early this morning toward 20nm, however overall 
they are expected to be 4 feet or less. As a result, the conditions 
were kept below Small Craft Advisory criteria through tonight. Some 
showers and thunderstorms will be around today and this evening, 
however these may be more evident across the land areas. 


Outlook... 
Tuesday through Saturday...seas and winds are expected to remain below 
Small Craft Advisory criteria. Some gusty winds will be possible in 
the vicinity of thunderstorms Monday evening and Tuesday night, and 
again Friday night and Saturday. 


&& 


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


&& 


$$ 
Synopsis...miketta 
near term...gorse 
short term...gorse 
long term...miketta 
aviation...gorse/miketta 
marine...gorse/miketta 



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