Allentown, Pennsylvania Weather Conditions

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Current Conditions

  • 36°
  • Light Rain
  • Wind: NE 8 mph
  • Humidity: 93%
  • Visibility: 2.0 miles
  • Dew Point: 34°
  • Pressure: 30.18 in. 0
  • Heat Index: 29

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Next 12 Hours

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43°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Rain
  • High: 48 °
  • Low: 43 °
  • Rain
  • Wednesday
  • Rain
  • High: 59 °
  • Low: 43 °
  • Rain
  • Thursday
  • Chance of Rain
  • High: 50 °
  • Low: 32 °
  • Chance of Rain
  • Friday
  • Partly Cloudy
  • High: 46 °
  • Low: 34 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 52 °
  • Low: 30 °
  • Partly Cloudy

Forecast for Allentown, Pennsylvania

Updated: 10:00 PM EST on December 22, 2014

  • Monday

    Overcast with a chance of snow and a chance of rain in the afternoon. High of 39F. Winds less than 5 mph. Chance of snow 60%.

  • Monday Night

    Overcast with rain. Fog overnight. Low of 36F. Winds from the ENE at 5 to 10 mph. Chance of rain 80% with rainfall amounts near 0.2 in. possible.

  • Tuesday

    Overcast with rain, then a chance of rain in the afternoon. Fog early. High of 48F. Winds less than 5 mph. Chance of rain 60%.

  • Tuesday Night

    Overcast with a chance of rain, then rain after midnight. Low of 43F. Winds less than 5 mph. Chance of rain 80% with rainfall amounts near 0.3 in. possible.

  • Wednesday

    Overcast with rain. High of 59F. Winds from the SSE at 5 to 10 mph. Chance of rain 100% with rainfall amounts near 0.3 in. possible.

  • Wednesday Night

    Overcast with rain. Fog overnight. Low of 43F. Winds from the South at 10 to 15 mph. Chance of rain 90% with rainfall amounts near 0.4 in. possible.

  • Thursday

    Overcast with a chance of rain. High of 50F. Windy. Winds from the West at 15 to 25 mph with gusts to 35 mph. Chance of rain 20%.

  • Thursday Night

    Partly cloudy. Low of 32F. Winds from the West at 10 to 15 mph.

  • Friday

    Partly cloudy in the morning, then overcast. High of 46F. Winds from the WSW at 5 to 10 mph.

  • Friday Night

    Partly cloudy in the evening, then overcast. Low of 34F with a windchill as low as 28F. Winds from the SSW at 5 to 10 mph.

  • Saturday

    Overcast. High of 52F. Winds from the SW at 5 to 15 mph.

  • Saturday Night

    Partly cloudy. Low of 30F with a windchill as low as 21F. Winds from the WNW at 10 to 15 mph.

  • Sunday

    Partly cloudy. High of 48F. Breezy. Winds from the WNW at 15 to 20 mph.

  • Sunday Night

    Clear. Low of 27F. Winds from the WNW at 5 to 10 mph.

  • Monday

    Partly cloudy. High of 37F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy. Low of 28F. Winds less than 5 mph.

  • Tuesday

    Overcast with a chance of rain. Fog early. High of 36F. Winds less than 5 mph. Chance of rain 30%.

  • Tuesday Night

    Mostly cloudy. Fog overnight. Low of 23F. Winds from the WNW at 5 to 10 mph.

  • Wednesday

    Partly cloudy. High of 27F with a windchill as low as 16F. Winds from the WNW at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 18F with a windchill as low as 10F. Winds from the West at 5 to 10 mph.

  • Thursday

    Clear. High of 23F with a windchill as low as 10F. Winds from the West at 5 to 10 mph.

  • Thursday Night

    Partly cloudy. Low of 16F. Winds from the West at 5 to 10 mph.

  • Friday

    Clear. High of 25F with a windchill as low as 14F. Winds from the West at 5 to 10 mph.

  • Friday Night

    Clear. Low of 16F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South Filmore Street, Allentown, PA

Updated: 9:51 PM EST

Temperature: 36.0 °F Dew Point: 36 °F Humidity: 99% Wind: East at 2.2 mph Pressure: 30.13 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Park Ridge, Allentown, PA

Updated: 9:50 PM EST

Temperature: 37.2 °F Dew Point: 36 °F Humidity: 95% Wind: Calm Pressure: 29.87 in Hourly Precipitation: 0.01 in Windchill: 37 °F Graphs

Location: Whitehall, Whitehall, PA

Updated: 9:50 PM EST

Temperature: 37.1 °F Dew Point: 36 °F Humidity: 96% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.01 in Windchill: 37 °F Graphs

Location: Hokendauqua, Whitehall, PA

Updated: 9:53 PM EST

Temperature: 37.5 °F Dew Point: 35 °F Humidity: 91% Wind: Calm Pressure: 30.17 in Hourly Precipitation: 0.01 in Windchill: 38 °F Graphs

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

Updated: 9:53 PM EST

Temperature: 36.0 °F Dew Point: 36 °F Humidity: 99% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.01 in Windchill: 36 °F Graphs

Location: Lower Saucon Township, Bethlehem, PA

Updated: 9:53 PM EST

Temperature: 35.6 °F Dew Point: 31 °F Humidity: 82% Wind: Calm Pressure: 30.38 in Hourly Precipitation: 0.01 in Windchill: 36 °F Graphs

Location: Emmaus, Emmaus, PA

Updated: 9:46 PM EST

Temperature: 35.8 °F Dew Point: 36 °F Humidity: 99% Wind: Calm Pressure: 30.06 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Pheasant Hill Estates, Allentown, PA

Updated: 9:53 PM EST

Temperature: 36.5 °F Dew Point: 35 °F Humidity: 95% Wind: ESE at 1.1 mph Pressure: 29.60 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Harvest Fields, East Texas, Allentown, PA

Updated: 9:44 PM EST

Temperature: 35.2 °F Dew Point: 34 °F Humidity: 97% Wind: ESE at 2.2 mph Pressure: 30.15 in Hourly Precipitation: - Windchill: 35 °F Graphs

Location: Werner Ent. Allentown, Allentown, PA

Updated: 9:53 PM EST

Temperature: 35.3 °F Dew Point: 34 °F Humidity: 96% Wind: ENE at 4.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: South Mountain Drive, Emmaus, PA

Updated: 9:51 PM EST

Temperature: 35.8 °F Dew Point: 34 °F Humidity: 95% Wind: North at - Pressure: 29.86 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: upper saucon township, Coopersburg, PA

Updated: 9:50 PM EST

Temperature: 35.7 °F Dew Point: 35 °F Humidity: 96% Wind: North at 1.0 mph Pressure: 30.28 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Gwenmawr Road, Bethlehem, PA

Updated: 9:51 PM EST

Temperature: 36.7 °F Dew Point: 33 °F Humidity: 85% Wind: North at - Pressure: 30.25 in Hourly Precipitation: - Windchill: 37 °F Graphs

Location: West Allentown, Wescosville, PA

Updated: 9:50 PM EST

Temperature: 35.3 °F Dew Point: 35 °F Humidity: 98% Wind: ENE at 1.0 mph Pressure: 30.17 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: Upper Macungie Twp, Allentown, PA

Updated: 9:49 PM EST

Temperature: 35.8 °F Dew Point: 35 °F Humidity: 97% Wind: ENE at 4.2 mph Pressure: 30.07 in Hourly Precipitation: - Windchill: 32 °F Graphs

Location: Windermerre Park, Allentown, PA

Updated: 9:48 PM EST

Temperature: 39.9 °F Dew Point: - Humidity: 75% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 40 °F Graphs

Location: Macungie Area Weather, Macungie, PA

Updated: 9:53 PM EST

Temperature: 35.5 °F Dew Point: 35 °F Humidity: 98% Wind: Calm Pressure: 30.19 in Hourly Precipitation: 0.01 in Windchill: 36 °F Graphs

Location: Blue Church Road South, Coopersburg, PA

Updated: 9:51 PM EST

Temperature: 36.5 °F Dew Point: 32 °F Humidity: 83% Wind: North at - Pressure: 30.24 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Air Products Campus Wx, Allentown, PA

Updated: 9:53 PM EST

Temperature: 35.9 °F Dew Point: 34 °F Humidity: 94% Wind: NNE at 1.4 mph Pressure: 30.19 in Hourly Precipitation: 0.01 in Windchill: 36 °F Graphs

Location: Strawberry Acres, Coplay, PA

Updated: 9:50 PM EST

Temperature: 36.8 °F Dew Point: 35 °F Humidity: 94% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Bethlehem Township, Bethlehem, PA

Updated: 9:53 PM EST

Temperature: 36.0 °F Dew Point: 35 °F Humidity: 95% Wind: East at 2.9 mph Pressure: 30.19 in Hourly Precipitation: 0.01 in Windchill: 36 °F Graphs

Location: Beechwood Street, Allentown, PA

Updated: 9:50 PM EST

Temperature: 36.9 °F Dew Point: 31 °F Humidity: 80% Wind: North at - Pressure: 30.20 in Hourly Precipitation: - Windchill: 37 °F Graphs

Location: Orefield, PA

Updated: 9:50 PM EST

Temperature: 35.5 °F Dew Point: 35 °F Humidity: 97% Wind: SE at 1.0 mph Pressure: 29.94 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Wassergass, Hellertown, PA

Updated: 9:53 PM EST

Temperature: 35.8 °F Dew Point: 36 °F Humidity: 99% Wind: NNW at 4.0 mph Pressure: 30.15 in Hourly Precipitation: 0.00 in Windchill: 32 °F Graphs

Location: Fogelsville, PA

Updated: 9:53 PM EST

Temperature: 35.5 °F Dew Point: 33 °F Humidity: 91% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Windchill: 36 °F Graphs

Location: Alburtis, Alburtis, PA

Updated: 9:47 PM EST

Temperature: 35.6 °F Dew Point: 35 °F Humidity: 99% Wind: Calm Pressure: 29.94 in Hourly Precipitation: - Windchill: 36 °F Graphs

Location: Jamesville, Bath, PA

Updated: 9:39 PM EST

Temperature: 36.0 °F Dew Point: 36 °F Humidity: 99% Wind: ESE at 3.1 mph Pressure: 29.96 in Hourly Precipitation: - Windchill: 34 °F Graphs

Location: Pointe West, Fogelsville, PA

Updated: 9:53 PM EST

Temperature: 35.4 °F Dew Point: 32 °F Humidity: 87% Wind: Calm Pressure: 30.07 in Hourly Precipitation: 0.00 in Windchill: 35 °F Graphs

Location: The Vineyard, Easton, PA

Updated: 9:53 PM EST

Temperature: 36.0 °F Dew Point: 35 °F Humidity: 95% Wind: NNE at 1.0 mph Pressure: 30.05 in Hourly Precipitation: 0.01 in Windchill: 36 °F Graphs

Location: Breinigsville / Lower Macungie, Mertztown, PA

Updated: 9:50 PM EST

Temperature: 36.2 °F Dew Point: 35 °F Humidity: 96% Wind: NE at 6.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Windchill: 31 °F Graphs

Location: Kefallonia Drive, Hellertown, PA

Updated: 9:41 PM EST

Temperature: 35.1 °F Dew Point: 34 °F Humidity: 95% Wind: ESE at 2.2 mph Pressure: 30.06 in Hourly Precipitation: - Windchill: 35 °F Graphs

Location: Springtown, PA, Springtown, PA

Updated: 9:52 PM EST

Temperature: 36.6 °F Dew Point: 36 °F Humidity: 96% Wind: East at 2.0 mph Pressure: 30.20 in Hourly Precipitation: 0.00 in Windchill: 37 °F Graphs

Location: Washington Township, N3DL, Slatington, PA

Updated: 9:53 PM EST

Temperature: 38.5 °F Dew Point: 36 °F Humidity: 94% Wind: Calm Pressure: 30.13 in Hourly Precipitation: 0.00 in Windchill: 38 °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 
943 PM EST Monday Dec 22 2014 


Synopsis... 
a frontal boundary will stall near the southeast coast through 
Tuesday. This stalled boundary will eventually lift northward into 
the area as a warm front by Wednesday. Meanwhile, low pressure 
developing near the northern Gulf Coast late Tuesday is expected to 
strengthen as it tracks northward into the Midwest Wednesday and 
Great Lakes Wednesday night. A cold front will move through early 
Thursday. High pressure builds over the eastern United States for 
Thursday and Friday. Another cold front is forecast to arrive late 
Saturday into Sunday. 


&& 


Near term /until 6 am Tuesday morning/... 
latest rap guidance shows a couple low-level features pushing 
across the region from the southwest, noted by the distinct rain 
bands. We maintain the current pop forecast, categorical across 
the north with slightly less across extreme southern Delaware-Maryland-Virginia. 
Have also dropped the Freezing Rain Advisory with this update as 
temperatures are above freezing in most locations. There could be 
some lingering at or below freezing temperatures in the highest 
elevations in Carbon/Monroe, but this can be handled by an Special Weather Statement. 


Otherwise, as the airmass moistens and the low-level inversion 
strengthens, some drizzle may occur along with some fog. Given the warm air advection 
forecast, despite the light flow, the temperatures were shown to 
mainly be steady or even slowly rise during the night. Low 
temperatures were mostly a blend of the NAM/GFS MOS. The lamp/lav 
guidance was used to assist with the hourly temperatures and dew 
points. 


&& 


Short term /6 am Tuesday morning through 6 PM Tuesday/... 
the synoptic setup is comprised of an upper-level trough to our 
west. This will drive low pressure toward the Great Lakes with 
continued low-level warm air advection across our area. A weak surface low sliding 
northward off of the middle Atlantic coast should tend to weaken 
further during the course of the day as some ridging builds. The 
combination of this weakening feature, a low-level inversion and 
plenty of moisture beneath it spells unsettled weather. 


The forecast soundings overall show as the large scale lift wanes, 
some drying occurs aloft. This would tend to lead to some drizzle 
and fog across much of the area, assuming the low clouds do indeed 
lock in. The more focused rain may be across our northern zones 
before lifting north of our cwa, then leftover drizzle around. We 
trended the probability of precipitation to reflect this idea as much of the quantitative precipitation forecast should be 
on the light side. 


As for the high temperatures, we used an even GFS/NAM MOS blend but 
then adjusted these down some due to the expected low clouds and 
light rain/drizzle. 


&& 


Long term /Tuesday night through Monday/... 
the large scale pattern during midweek will feature a high amplitude 
trough over the central Continental U.S. And downstream ridge over the western 
Atlantic. Cyclogenesis is forecast to occur along the northern Gulf 
Coast late Tuesday. The surface low is then forecast to track 
northward through the deep south Tuesday night and Midwest on 
Wednesday. This track means the warm sector will become established 
up the eastern Seaboard owing to a deep southerly fetch on the east 
side of the storm system. Forecast soundings are only supportive on 
one ptype with this event: rain. There is an opportunity for a 
brief lull in the rain Tuesday evening when the initial band of 
isentropic lift passes to our north. A large precipitation shield over the 
southeast states is expected to expand northward into the northern 
middle Atlantic late Tuesday night and Wednesday morning. Rain should 
become widespread and moderate at times on Christmas evening both during 
the day and at night. Added a slight chance of thunderstorms near 
the Delaware and southern New Jersey coast as well. Not expecting a lot of Hydro 
issues with quantitative precipitation forecast between 0.75 and 1.50 inches for this event. 


Models have trended slightly slower with the cold front, indicating 
a late Wednesday night/early Thursday morning frontal passage with today's 12z 
guidance compared to a Wednesday evening passage from yesterday's 
runs. We favored a more progressive solution where the precipitation ends 
by Christmas morning since the upper trough is expected to 
Delaware-amplify, allowing for more of an eastward push with the frontal 
boundary. 


Westerly winds behind the front will advect colder and drier air 
into the region on Thursday. Skies may clear in the morning before 
Post-frontal stratocu is expected to develop by the afternoon. It 
will be breezy during the day as BUFKIT momentum Transfer from the 
12z GFS shows the potential for 30 to 40 miles per hour gusts. Maximum temperatures in the 
upper 40s and lower 50s may occur in the early morning just prior to 
frontal passage before dropping thruout the day. A few flurries may reach the 
Poconos during the afternoon. 


Broad area of high pressure builds along the eastern Seaboard 
Thursday night and Friday. Quiet conditions and slightly above 
normal temperatures are in store to end the week. 


There is still a large forecast spread with the latest 12z models 
for this weekend. The European model (ecmwf) remains the most bullish with low 
pressure developing over the Gulf Coast states this weekend as a 
result of a strong shortwave trough tracking across the southern 
states. This model then simulates the low strengthening as it moves 
northeastward toward the Middle-Atlantic States and starts to phase 
with northern stream energy Sunday and Sunday night. Meanwhile, the 
GFS shows a much more progressive pattern with the above mentioned 
shortwave trough pushing a weak cold front through the middle Atlantic 
earlier in the weekend. Sided closely with wpc for the weekend 
forecast, which was weighted more toward the naefs/European model (ecmwf) ensemble 
mean. Low chance probability of precipitation for rain near the coast and rain/snow inland 
were included for late in the weekend. 


&& 


Aviation /03z Tuesday through Saturday/... 
the following discussion is for kphl, kpne, kttn, kabe, krdg, kilg, 
kmiv, kacy and surrounding areas. 


Tonight...MVFR ceilings are anticipated to lower to IFR/LIFR with 
light rain and drizzle. Some fog will occur as the ceilings lower, 
which will bring the visibilities down. Northeast winds generally 
around 5 knots. 


Tuesday...the ceilings should remain around IFR as the low-level 
moisture becomes trapped. This will also combine with some light 
rain or drizzle. Northeast winds 5 knots or less, possibly turning 
locally southeast in the afternoon. 


Outlook... 
Tuesday night...may be a lull in precipitation Tuesday evening before 
more rain moves back into the area overnight. Still expecting MVFR 
and IFR conditions. 


Wednesday and Wednesday night...mainly IFR conditions in low clouds 
and rain. The rain will be steady and moderate at times. Southerly 
winds are forecast to increase to near 50 knots less than 1000 feet above ground level 
Wednesday afternoon and evening. May see low level wind shear during this time 
especially if wedge of colder air near the surface is more stubborn 
to erode than models indicate, making the thermal inversion stronger. 


Thursday...MVFR lingering early, improving to VFR during the day. 
Breezy west winds gusting 30-25 knots. 


Thursday night through Saturday...VFR and light winds. 


&& 


Marine... 
we are starting to see an uptick in the seas across our waters 
with the most noticeable increase across the south. We expect, 
with a strengthening northeastrly flow, to see seas across the 
south climb close to 6 feet later tonight. We have therefore 
issued a Small Craft Advisory with winds and seas through tomorrow late morning 
when the pressure gradient should relax enough to allow the 
elevated sea conditions subside a bit. Elsewhere, the trajectory 
and the amount of fetch do not appear conducive for Small Craft Advisory seas and 
gusts. The winds should lessen Tuesday as the surface low weakens. 


Outlook... 
Tuesday night...south winds below Small Craft Advisory criteria. Waves forecast to 
build to 4 feet off the Delaware coast. 


Wednesday and Wednesday night...widespread Small Craft Advisory conditions expected 
with seas building to 5-8 feet and southerly winds sustained 20-25 knots. 
Stable lapse rates will limit mixing potential so not expecting much 
higher gusts, except if convection is able to develop over the ocean. 


Thursday...west wind gusting in excess of 25 knots expected. Gales 
are even possible during for a period. 5 to 8 feet seas forecast for 
the ocean. 


Thursday night through Saturday...no marine headlines expected at 
this time. 


&& 


Phi watches/warnings/advisories... 
PA...none. 
New Jersey...none. 
Delaware...none. 
Maryland...none. 
Marine...Small Craft Advisory until 1 PM EST Tuesday for anz453>455. 


&& 


$$ 
Synopsis...Klein 
near term...gorse/Heavener 
short term...gorse 
long term...Klein 
aviation...gorse/Heavener/Klein 
marine...gorse/iovino/Heavener/Klein 












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