Allentown, PA
Climate overview — based on NOAA 1991-2020 normals from ALLENTOWN INTL AP, PA US.
Year-round temperatures (°F)
Climate summary
Allentown has an annual average temperature of 53.1°F with about 47.4 inches of precipitation per year and 33.1 inches of snow. The warmest month is July (average high 86.4°F), and the coldest is January (average low 21.8°F). July is typically the wettest month (5.30 in) and February the driest (2.77 in). Snow typically falls from October through April.
Best time to visit Allentown
Full guide →Climate change signal
All-time records →60 of 366 (16.4%) of Allentown's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1940s | 23 | |
| 1950s | 50 | |
| 1960s | 41 | |
| 1970s | 34 | |
| 1980s | 38 | |
| 1990s | 57 | |
| 2000s | 40 | |
| 2010s | 53 | |
| 2020s | 30 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 38.4°F | 21.8°F | 30.1°F | 3.30 in | 9.8 in | 11 |
| February | 41.6°F | 23.2°F | 32.4°F | 2.77 in | 10.8 in | 10 |
| March | 50.8°F | 30.5°F | 40.7°F | 3.63 in | 6.3 in | 11 |
| April | 63.4°F | 40.3°F | 51.8°F | 3.67 in | 0.5 in | 12 |
| May | 73.5°F | 50.6°F | 62.0°F | 3.65 in | — | 12 |
| June | 81.9°F | 59.9°F | 70.9°F | 4.40 in | — | 11 |
| July | 86.4°F | 64.7°F | 75.6°F | 5.30 in | — | 11 |
| August | 84.3°F | 62.8°F | 73.6°F | 4.56 in | — | 10 |
| September | 77.4°F | 55.2°F | 66.3°F | 4.84 in | — | 10 |
| October | 65.5°F | 43.8°F | 54.6°F | 4.14 in | 0.2 in | 10 |
| November | 53.8°F | 34.1°F | 43.9°F | 3.24 in | 0.9 in | 9 |
| December | 43.1°F | 26.8°F | 35.0°F | 3.86 in | 4.6 in | 12 |
Climate twins of Allentown
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).