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Forecast confidence: High · models disagree by 2°F

Allentown weather

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Fog,cooler tomorrow

NWS, the American and the European model agree on a high near 82° in Allentown today. Tomorrow looks cloudy around 75°, with a 4% chance of rain.

82°66°
75°57°
70°61°
68°58°
61°52°
62°50°
Todaymodels agreeTomorrowmodels agreeSundaysplit ±8°Mondaysplit ±6°Tuesdaysplit ±6°Wednesdaysplit ±6°
NWSNational Blend (NBM)
81°
Fog
Today 81°·Low 65°·Rain 3%
AmericanNOAA GFS
82°
Fog
Today 82°·Low 66°·Rain 3%
EuropeanECMWF
83°
Cloudy
Today 83°·Low 67°·Rain 54%
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Allentown weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Allentown weather in numbers

from 30 years of measured normals

Allentown swings 60°F across the year, from 87°F highs in July to 27°F lows in February, and December is usually the wettest month in a year that brings about 44 in of precipitation.

Warmest month
July
87°F average high
Coldest month
February
27°F average low
Wettest month
December
44 in a year
Below freezing
3 months
January, February and December
Comfortable
4 months
April, May, September and October
Residents
120,000
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The weather map: all three models at once

NWS, American, European side by side around Allentown and nearby towns.Live rain radar →
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Allentown hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Allentown 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Fog
82° 66°
models agree
Tomorrow
Cloudy
75° 57°
models agree
Sun
Light rain
70° 61°
±8°
Mon
Light drizzle
68° 58°
±6°
Tue
Drizzle
61° 52°
±6°
Wed
Light drizzle
62° 50°
±6°
Thu
Drizzle
62° 52°
±9°
Fri
Drizzle
68° 51°
±4°
Sat
Cloudy
70° 52°
models agree
Sun
Mostly clear
70° 54°
±5°
Mon
Light drizzle
73° 54°
models agree
Tue
Drizzle
76° 55°
models agree
Wed
Rain
70° 59°
±5°
Thu
Cloudy
67° 52°
models agree

Allentown, Pennsylvania (PA) is at its warmest in Jul (average highs near 87°F) and coldest in Feb (lows around 27°F), with roughly 44 in of precipitation across the year. Below, compare what NWS, American, European forecast for Allentown right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Allentown climate by month

average daytime high and overnight low across a typical year
Jan
43°
29°
Feb
46°
27°
Mar
51°
33°
Apr
64°
42°
May
72°
50°
Jun
82°
60°
Jul
87°
67°
Aug
82°
63°
Sep
76°
58°
Oct
67°
47°
Nov
54°
36°
Dec
44°
30°

Which forecast is most accurate in Allentown?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
94
/100rank #1
87±1.3°F97±1.0 mph100100% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
80
/100rank #2
84±1.6°F94±1.9 mph6581% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±2°81° to 83°±51%3% to 54% chance
Tomorrow±3°74° to 77°±4%0% to 4% chance
Sun±8°66° to 74°±6%88% to 94% chance
Mon±6°65° to 70°±5%63% to 68% chance
Tue±6°58° to 64°±14%20% to 34% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Allentown

today, local time
Sunrise
06:45
Sunset
19:05
Daylight
12h 20m

Common questions

What's the weather in Allentown today?
On this page we show what NWS, American, European each forecast for Allentown today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Allentown today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Allentown and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Allentown?
Over the last 30 days, the European model has been the most accurate for Allentown (CheckWeather Score 94/100), ahead of the American at 80. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Allentown?
July is typically the warmest month in Allentown, with average highs around 87°F.
How cold does Allentown get?
The coldest month in Allentown is February, when overnight lows average about 27°F.
How much rain does Allentown get?
Allentown sees roughly 44 in of precipitation a year, with December usually the wettest month.

Nearby

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