Allentown (PA)
May
Weather in Allentown, Pennsylvania for May 2027
Your guide to Allentown weather in May - trends and predictions
In general, the average temperature in Allentown at the beginning of May is 20.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 21.4 °F by the end of May.
Allentown experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 268.6 mm.
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Temperatures
Rain 🌧️
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8
Dry days
23
Rainy days
0
Snow days
19°/10°
Temperatures
18 km/h
Avg max wind
78 %
Avg humidity
Allentown Weather May
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Temperatures trend during May in Allentown
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May weather in Allentown day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Overcast | 20° /5° | 1.2 mm | 7 | |
| May 2 | Overcast | 20° /10° | 3 mm | 8 | |
| May 3 |  Moderate rain at times | 21° /9° | 2.8 mm | 8 | |
| May 4 | Moderate or heavy rain shower | 20° /10° | 7.2 mm | 7 | |
| May 5 |  Heavy rain at times | 22° /13° | 1.1 mm | 7 | |
| May 6 | Moderate or heavy rain shower | 19° /12° | 12.5 mm | 4 | |
| May 7 | Overcast | 19° /9° | 0.9 mm | 7 | |
| May 8 | Moderate or heavy rain shower | 19° /8° | 3.9 mm | 7 | |
| May 9 | Moderate or heavy rain shower | 13° /8° | 13.6 mm | 4 | |
| May 10 |  Partly cloudy | 21° /7° | 1.6 mm | 7 | |
| May 11 |  Sunny | 19° /9° | 0 mm | 6 | |
| May 12 | Partly cloudy | 21° /6° | 0 mm | 9 | |
| May 13 | Moderate rain at times | 19° /12° | 8 mm | 5 | |
| May 14 | Moderate or heavy rain shower | 15° /10° | 5.4 mm | 5 | |
| May 15 | Moderate or heavy rain shower | 19° /11° | 4.1 mm | 5 | |
| May 16 | Heavy rain at times | 24° /11° | 1.1 mm | 8 | |
| May 17 | Overcast | 27° /15° | 0 mm | 8 | |
| May 18 |  Patchy rain possible | 26° /14° | 0.9 mm | 7 | |
| May 19 | Sunny | 26° /14° | 0.2 mm | 8 | |
| May 20 | Overcast | 24° /10° | 4 mm | 7 | |
| May 21 | Heavy rain at times | 12° /10° | 12.3 mm | 3 | |
| May 22 | Heavy rain at times | 16° /9° | 6.7 mm | 7 | |
| May 23 | Moderate rain at times | 13° /7° | 15.2 mm | 3 | |
| May 24 | Patchy rain possible | 14° /7° | 8.3 mm | 3 | |
| May 25 |  Mist | 21° /8° | 1.8 mm | 3 | |
| May 26 | Partly cloudy | 22° /11° | 0 mm | 8 | |
| May 27 | Mist | 23° /13° | 0.1 mm | 5 | |
| May 28 |  Moderate rain | 17° /10° | 30 mm | 7 | |
| May 29 | Fog | 23° /10° | 1.7 mm | 8 | |
| May 30 | Moderate or heavy rain shower | 21° /12° | 44 mm | 8 | |
| May 31 | Light rain shower | 23° /9° | 1.6 mm | 8 | |
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Important Notice
Our weather forecast for Allentown in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Allentown forecast closer to your planned date for the most up-to-date weather information.
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Allentown in May - FAQ
What are the expected maximum and minimum temperatures in Allentown during May?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Allentown during May?
Significant rainfall exceeding 268.6 mm is expected in Allentown during May, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Allentown during May?
The average wind speed in Allentown during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Allentown
Explore the daily rainfall trends and prepare for Allentowns May weather 💧
Typically, Allentown has 23 rainy days in May with a total of 268.6 mm of rainfall.
UV exposure in Allentown during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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