Historical Weather in Allentown, PA
See 55+ years of weather history for any date in Allentown going back to 1970.
Part of Pennsylvania weather history
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Today in Allentown Weather HistorySee records, averages, and 55+ years of data for today's date
→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 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) |
Allentown Snow RecordsSee the top 10 snowiest days ever recorded
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