Lehigh County (Allentown)
May
Weather in Lehigh County, Pennsylvania for May 2026
Your guide to Lehigh County weather in May - trends and predictions
In general, the average temperature in Lehigh County at the beginning of May is 22.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °F by the end of May.
Lehigh County in May brings notable rainfall, with an average of 19 rainy days and a total precipitation of 275.1 mm.
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Temperatures
Rain 🌧️
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12
Dry days
19
Rainy days
0
Snow days
20°/11°
Temperatures
18 km/h
Avg max wind
80 %
Avg humidity
Lehigh County Weather May
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Temperatures trend during May in Lehigh County
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May weather in Lehigh County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Overcast | 25° /7° | 0 mm | 6 | |
| May 2 | Overcast | 28° /14° | 0 mm | 6 | |
| May 3 |  Moderate rain at times | 27° /16° | 5.5 mm | 6 | |
| May 4 | Moderate or heavy rain shower | 20° /15° | 14.4 mm | 5 | |
| May 5 |  Heavy rain at times | 19° /14° | 2.3 mm | 4 | |
| May 6 | Moderate or heavy rain shower | 19° /13° | 12.6 mm | 4 | |
| May 7 | Overcast | 22° /12° | 0 mm | 5 | |
| May 8 | Moderate or heavy rain shower | 22° /12° | 6.7 mm | 5 | |
| May 9 | Moderate or heavy rain shower | 13° /9° | 20.8 mm | 3 | |
| May 10 |  Partly cloudy | 21° /7° | 0.3 mm | 6 | |
| May 11 |  Sunny | 22° /10° | 0 mm | 6 | |
| May 12 | Partly cloudy | 25° /9° | 0 mm | 7 | |
| May 13 | Moderate rain at times | 20° /15° | 9.2 mm | 5 | |
| May 14 | Moderate or heavy rain shower | 16° /13° | 10 mm | 4 | |
| May 15 | Moderate or heavy rain shower | 21° /15° | 8.2 mm | 5 | |
| May 16 | Heavy rain at times | 24° /16° | 2.3 mm | 5 | |
| May 17 | Overcast | 25° /17° | 0 mm | 6 | |
| May 18 |  Patchy rain possible | 21° /12° | 0.4 mm | 5 | |
| May 19 | Sunny | 21° /10° | 0 mm | 6 | |
| May 20 | Overcast | 18° /5° | 0 mm | 4 | |
| May 21 | Heavy rain at times | 12° /10° | 12.3 mm | 3 | |
| May 22 | Heavy rain at times | 10° /8° | 13.4 mm | 3 | |
| May 23 | Moderate rain at times | 16° /7° | 2.1 mm | 4 | |
| May 24 | Patchy rain possible | 15° /6° | 0.1 mm | 4 | |
| May 25 |  Mist | 19° /6° | 0 mm | 4 | |
| May 26 | Partly cloudy | 19° /10° | 0 mm | 5 | |
| May 27 | Mist | 20° /10° | 0 mm | 5 | |
| May 28 |  Moderate rain | 13° /10° | 60 mm | 3 | |
| May 29 | Fog | 24° /12° | 3.3 mm | 5 | |
| May 30 | Moderate or heavy rain shower | 22° /16° | 88.1 mm | 5 | |
| May 31 | Light rain shower | 20° /11° | 3.1 mm | 5 | |
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Important Notice
Our weather forecast for Lehigh County 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 Lehigh County forecast closer to your planned date for the most up-to-date weather information.
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Lehigh County in May - FAQ
What are the expected maximum and minimum temperatures in Lehigh County during May?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lehigh County during May?
Significant rainfall exceeding 275.1 mm is expected in Lehigh County during May, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lehigh County during May?
The average wind speed in Lehigh County during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Lehigh County
Explore the daily rainfall trends and prepare for Lehigh Countys May weather 💧
UV exposure in Lehigh County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Lehigh County?Get accurate weather forecasts for Lehigh County, located at latitude 40.608 and longitude -75.49. Stay updated with localized weather information tailored for Lehigh County.
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