Best Time to Visit Allentown
Best time: Jun, Jul, Aug, May.
Jul is warmest (29.9°C high); May is rainiest (114 mm).
Allentown weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 2.6 | -7.1 | 84 | 2.8 |
| Feb | 4.4 | -6.4 | 69 | 4.3 |
| Mar | 9.8 | -1.7 | 88 | 5.8 |
| Apr | 16.2 | 3.2 | 92 | 7.5 |
| May | 22.7 | 9.2 | 114 | 8.6 |
| Jun | 27.4 | 14.2 | 102 | 9.3 |
| Jul | 29.9 | 17 | 107 | 9.2 |
| Aug | 29.2 | 16.2 | 105 | 8.2 |
| Sep | 25.4 | 12.1 | 104 | 6.6 |
| Oct | 18.9 | 5.5 | 86 | 4.8 |
| Nov | 12.2 | 0.8 | 96 | 3.1 |
| Dec | 5.8 | -3.9 | 86 | 2.4 |
Average high temperature
Best months by activity
Overall: JunJulAugMay
Beaches: JulAug
Hiking: AprMayOct
Sightseeing: JunJulAugMay
Allentown quick facts
What to pack
Cold months (Jan, Feb, Mar, Nov, Dec): warm layers and a coat.
Wet months (Apr, May, Jun, Jul, Aug, Sep, Nov): raincoat and umbrella.
Frequently asked questions
When is the best time to visit Allentown?
Jun, Jul, Aug, May.
What is the rainiest month?
May, about 114 mm.
What is the warmest month?
Jul, with average highs of 29.9°C.
Where to stay
See Allentown hotels · Book Allentown tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.