Weather in Allentown, Pennsylvania, United States
Historical monthly conditions · 2021–2025
Monthly averages
Average daily air-temperature lows/highs and peak wind gusts. Rain is the average monthly total.
| Month | Avg low | Avg high | Rain | Cloud cover | Avg peak gust |
|---|---|---|---|---|---|
| January | -3°C | 4°C | 90.3 mm | 59% | 41.3 km/h |
| February | -3°C | 6°C | 84.4 mm | 59% | 40.2 km/h |
| March | 2°C | 12°C | 101.8 mm | 56% | 44.5 km/h |
| April | 6°C | 17°C | 113.0 mm | 62% | 42.8 km/h |
| May | 12°C | 22°C | 108.3 mm | 63% | 36.0 km/h |
| June | 17°C | 27°C | 85.8 mm | 59% | 34.6 km/h |
| July | 20°C | 30°C | 111.4 mm | 57% | 32.3 km/h |
| August | 18°C | 29°C | 117.4 mm | 55% | 31.6 km/h |
| September | 15°C | 25°C | 110.2 mm | 54% | 32.4 km/h |
| October | 9°C | 19°C | 77.4 mm | 47% | 34.5 km/h |
| November | 2°C | 12°C | 67.7 mm | 48% | 39.0 km/h |
| December | -1°C | 6°C | 104.7 mm | 61% | 37.3 km/h |
Weather match by month
Feels like 15°C–30°C · cloud ≤60% · rain ≤0.1 mm/h · gust ≤50 km/h
Feels-like temperature accounts for humidity and wind in shade. Percentages cover 08:00–20:00 local solar time.
| Month | Match rate | |
|---|---|---|
| January | 0.0% | |
| February | 0.0% | |
| March | 2.2% | |
| April | 9.2% | |
| May | 24.5% | |
| June | 29.3% | |
| July | 22.6% | |
| August | 34.0% | |
| September | 40.6% | |
| October | 20.4% | |
| November | 5.7% | |
| December | 0.0% |
About this location and data
- Urban-centre population
- 131,610
- Elevation
- 156 m
- Coordinates
- 40.60°N, 75.48°W
- Urban area
- 40 km²
Weather averages use 2 ERA5 grid cells, weighted by the area of the urban centre in each cell.
2021-2025 recent-weather sample (not a 30-year normal).
How the weather scores are calculated