What is the highest temperature ever recorded in Allentown, PA?

The record high temperature in Allentown, PA is 104°F, recorded on July 22, 2011.

What is the lowest temperature ever recorded in Allentown, PA?

The record low temperature in Allentown, PA is -23°F, recorded on January 21, 1994.

Historical Weather in Allentown, PA

Name: Allentown, PA Temperature Records
Creator: NOAA

See 55+ years of weather history for any date in Allentown going back to 1970.

Part of Pennsylvania weather history · Pennsylvania temperature records

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Today in Allentown Weather HistorySee records, averages, and 55+ years of data for today's date

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Monthly Climate Averages

Historical temperature and precipitation averages for Allentown, PA, based on 55+ years of weather data.

Warmest MonthJulyAvg High: 85°F / Low: 64°F

Coldest MonthJanuaryAvg High: 37°F / Low: 21°F

Jan

37°/ 21°

💧 7.6"

❄️ 1.8"

Feb

40°/ 22°

💧 7.4"

❄️ 2.3"

Mar

50°/ 30°

💧 8.7"

❄️ 2.2"

Apr

62°/ 39°

💧 8.4"

❄️ 1.4"

May

72°/ 50°

💧 8.6"

Jun

80°/ 59°

💧 9.6"

❄️ 0.6"

Jul

85°/ 64°

💧 11.9"

Aug

83°/ 62°

💧 11.3"

Sep

76°/ 55°

💧 12.5"

Oct

64°/ 44°

💧 10.4"

❄️ 3.3"

Nov

53°/ 34°

💧 9.2"

❄️ 1.5"

Dec

42°/ 26°

💧 8.8"

❄️ 1.5"

Temperatures in Fahrenheit. Precipitation and snowfall in inches.

Allentown, PA Temperature Range by Month

Average monthly highs and lows. The shaded band shows the typical daily temperature range.

Avg high Avg low

Allentown, PA Monthly Precipitation

Average rainfall and snowfall per month, in inches.

Rain (in) Snow (in)

Allentown, PA Daily Temperature Calendar

Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.

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Best Time to Visit Allentown, PA

Allentown, PA has no months that meet our "pleasant" threshold — every season has tradeoffs.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pleasant (65-82°F, ≤2.5" rain) Mild Less ideal

Allentown Temperature Records

Record High: The hottest temperature ever recorded in Allentown, PA is 104°F, set on July 22, 2011.
Record Low: The coldest temperature ever recorded in Allentown, PA is -23°F, set on January 21, 1994.
Data Coverage: Based on 57 years of data from NOAA weather station: ALLENTOWN LEHIGH VLY INTL AP.

All-Time Record High

104°F

July 22, 2011

All-Time Record Low

-23°F

January 21, 1994

Monthly Temperature Records in Allentown

Month	Record High	Record Low
January	72°F(2007)	-23°F(1994)
February	81°F(2018)	-20°F(2015)
March	89°F(1998)	-7°F(2014)
April	94°F(2002)	15°F(1982)
May	96°F(1996)	24°F(2002)
June	99°F(2025)	36°F(1986)
July	104°F(2011)	38°F(2000)
August	103°F(2001)	39°F(1982)
September	99°F(1980)	30°F(1993)
October	93°F(2019)	15°F(2008)
November	83°F(2024)	7°F(2018)
December	75°F(1984)	-9°F(2005)