Annual mean
Annual mean of daily highs
Annual mean of daily lows
Allentown city, Pennsylvania
Official LSAD Designation: Allentown city • Census GEOID: 4202000
• Lehigh County
Climate Normals & Weather Observations
30-year climate normals (1991–2020) and weather observations for Allentown city.
Reference Weather Station: ALLENTOWN INTL AP, PA US (ID: USW00014737)
• Located 4.2 miles from community center
• Elevation: 118.9 m
| Month | Average High (°F) | Average Low (°F) | Mean Temp (°F) | Precipitation (in) |
|---|---|---|---|---|
| January | 38.4° | 21.8° | 30.1° | 3.30" |
| February | 41.6° | 23.2° | 32.4° | 2.77" |
| March | 50.8° | 30.5° | 40.7° | 3.63" |
| April | 63.4° | 40.3° | 51.8° | 3.67" |
| May | 73.5° | 50.6° | 62.0° | 3.65" |
| June | 81.9° | 59.9° | 70.9° | 4.40" |
| July | 86.4° | 64.7° | 75.6° | 5.30" |
| August | 84.3° | 62.8° | 73.6° | 4.56" |
| September | 77.4° | 55.2° | 66.3° | 4.84" |
| October | 65.5° | 43.8° | 54.6° | 4.14" |
| November | 53.8° | 34.1° | 43.9° | 3.24" |
| December | 43.1° | 26.8° | 35.0° | 3.86" |
Annual Temperature History
2010–2025, completed calendar years only.
NOAA station ALLENTOWN INTL AP, PA US (ID: USW00014737) • 4.2 miles from community center .
This is the same reference station used for monthly normals.
Source: NOAA NCEI Global Summary of the Year.
Annual temperature data table (°F)
| Year | Annual mean (°F) | Annual mean of daily highs (°F) | Annual mean of daily lows (°F) |
|---|---|---|---|
| 2010 | 52.7 | 63.1 | 42.4 |
| 2011 | 53.2 | 63.3 | 43.1 |
| 2012 | 54.6 | 64.9 | 44.3 |
| 2013 | 51.8 | 61.8 | 41.9 |
| 2014 | 50.5 | 60.8 | 40.2 |
| 2015 | 52.6 | 63.3 | 41.9 |
| 2016 | 54.2 | 65.3 | 43.2 |
| 2017 | 54.0 | 64.1 | 44.0 |
| 2018 | 53.9 | 63.1 | 44.6 |
| 2019 | 54.3 | 64.1 | 44.6 |
| 2020 | 54.5 | 64.6 | 44.4 |
| 2021 | 53.3 | 63.2 | 43.5 |
| 2022 | 52.2 | 62.9 | 41.5 |
| 2023 | 53.6 | 64.0 | 43.3 |
| 2024 | 54.2 | 64.4 | 43.9 |
| 2025 | 52.2 | 62.4 | 42.1 |
Source: NOAA NCEI 1991–2020 U.S. Climate Normals, National Weather Service.