Allentown in May
7.5out of 10
Yes, a good time to go
Warm and comfortable: highs around 22°C. Frequent rain: about 11 rainy days.
22°CAvg high
12°CAvg low
11Rainy days (94 mm)
14:16 hDaylight
05:50Sunrise · 20:06 Sunset
Why this score
- Warm and comfortable: highs around 22°C
- Frequent rain: about 11 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in May varies a lot between years (±3.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 3°C | -4°C | 87 mm | 9 | – | – | 4.4 |
| February | 5°C | -3°C | 76 mm | 9 | – | – | 4.8 |
| March | 10°C | 0°C | 103 mm | 11 | – | – | 5.5 |
| April | 17°C | 6°C | 99 mm | 11 | – | – | 6.8 |
| May | 22°C | 12°C | 94 mm | 11 | – | – | 7.5 |
| June | 27°C | 17°C | 104 mm | 12 | – | – | 7.4 |
| July | 30°C | 19°C | 98 mm | 11 | – | – | 7.2 |
| August | 29°C | 19°C | 93 mm | 10 | – | – | 7.7 |
| September | 25°C | 15°C | 111 mm | 9 | – | – | 7.7 |
| October | 18°C | 8°C | 101 mm | 9 | – | – | 7.2 |
| November | 12°C | 3°C | 81 mm | 8 | – | – | 6.3 |
| December | 6°C | -1°C | 101 mm | 10 | – | – | 4.9 |
Frequently asked questions
How hot is Allentown in May?
Daytime highs average 22°C and nights about 12°C.
When is the best time to visit Allentown?
The best months are August, September, May, June.