Philadelphia (PA)
May
Weather in Philadelphia, Pennsylvania for May 2026
Your guide to Philadelphia weather in May - trends and predictions
Until now, May 2026 in Philadelphia is slightly cooler than the historical average by -1.3 °F.
The forecast for the coming days of May 2026 predicts a temperature of 25.4 °F , which is warmer than usual.
In general, the average temperature in Philadelphia at the beginning of May is 19.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.7 °F by the end of May.
Philadelphia experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 162.6 mm.
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Temperatures
Rain 🌧️
More
6
Dry days
25
Rainy days
0
Snow days
22°/13°
Temperatures
16 km/h
Avg max wind
67 %
Avg humidity
Philadelphia Weather May
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Temperatures trend during May in Philadelphia
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May weather in Philadelphia day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Partly cloudy | 18° /9° | 1.7 mm | 6 | |
| May 2 |  Overcast | 21° /11° | 2.1 mm | 6 | |
| May 3 | Partly cloudy | 20° /11° | 2.5 mm | 6 | |
| May 4 |  Patchy rain possible | 20° /11° | 4.1 mm | 5 | |
| May 5 |  Moderate or heavy rain shower | 20° /11° | 9.5 mm | 5 | |
| May 6 | Overcast | 19° /12° | 7.6 mm | 4 | |
| May 7 | Patchy rain possible | 20° /11° | 7 mm | 5 | |
| May 8 | Patchy rain possible | 20° /11° | 6.8 mm | 5 | |
| May 9 | Patchy rain possible | 18° /10° | 16.4 mm | 5 | |
| May 10 | Partly cloudy | 21° /9° | 3.7 mm | 6 | |
| May 11 | Partly cloudy | 20° /10° | 0.2 mm | 5 | |
| May 12 |  Sunny | 22° /10° | 1.7 mm | 6 | |
| May 13 | Overcast | 21° /12° | 1.1 mm | 6 | |
| May 14 | Overcast | 20° /13° | 10.3 mm | 5 | |
| May 15 |  Cloudy | 21° /12° | 1.9 mm | 5 | |
| May 16 | Moderate or heavy rain shower | 23° /13° | 4.3 mm | 6 | |
| May 17 | Sunny | 36° /18° | 0 mm | 8.5 | |
| May 18 | Patchy rain possible | 33° /18° | 0.4 mm | 8.9 | |
| May 19 | Sunny | 34° /20° | 0 mm | 9 | |
| May 20 | Patchy rain possible | 33° /20° | 0.8 mm | 9.2 | |
| May 21 | Patchy rain possible | 23° /12° | 3.5 mm | 1.1 | |
| May 22 |  Moderate rain | 13° /11° | 7.5 mm | 3 | |
| May 23 | Sunny | 22° /9° | 0 mm | 5 | |
| May 24 | Sunny | 22° /10° | 0 mm | 5 | |
| May 25 | Partly cloudy | 25° /12° | 0 mm | 5 | |
| May 26 | Patchy rain possible | 26° /18° | 0.2 mm | 5 | |
| May 27 | Sunny | 25° /14° | 0 mm | 5 | |
| May 28 | Sunny | 23° /13° | 0 mm | 5 | |
| May 29 | Sunny | 23° /13° | 0 mm | 5 | |
| May 30 | Partly cloudy | 18° /11° | 0 mm | 4 | |
| May 31 | Partly cloudy | 26° /13° | 12.3 mm | 6 | |
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Important Notice
Our weather forecast for Philadelphia 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 Philadelphia forecast closer to your planned date for the most up-to-date weather information.
Change Month
Philadelphia in May - FAQ
What are the expected maximum and minimum temperatures in Philadelphia during May?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Philadelphia during May?
Significant rainfall exceeding 162.6 mm is expected in Philadelphia during May, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Philadelphia during May?
The average wind speed in Philadelphia during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Philadelphia
Explore the daily rainfall trends and prepare for Philadelphias May weather 💧
Typically, Philadelphia has 25 rainy days in May with a total of 162.6 mm of rainfall.
UV exposure in Philadelphia during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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