Philadelphia
May
Weather in Philadelphia for May 2025
Your guide to Philadelphia weather in May - trends and predictions
In general, the average temperature in Philadelphia at the beginning of May is 17.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.1 °F by the end of May.
With an average of 4 rainy days, Philadelphia experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
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27
Dry days
4
Rainy days
0
Snow days
24°/10°
Temperatures
16 km/h
Avg max wind
64 %
Avg humidity
Philadelphia in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  17° | 2 19° | 3  16° | 4 14° | |||
| 5 15° | 6  20° | 7  23° | 8 26° | 9  18° | 10  18° | 11 21° |
| 12 21° | 13 21° | 14 21° | 15 20° | 16 20° | 17 21° | 18 21° |
| 19 23° | 20 23° | 21  26° | 22 28° | 23 25° | 24 27° | 25 25° |
| 26 27° | 27 24° | 28 25° | 29 26° | 30 23° | 31 26° |
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Temperatures trend during May in Philadelphia
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 | Patchy rain possible | 17° /11° | 4.5 mm | 4 | |
| May 2 | Patchy rain possible | 19° /10° | 1.5 mm | 5 | |
| May 3 | Moderate rain at times | 16° /8° | 0.8 mm | 5 | |
| May 4 | Patchy rain possible | 14° /7° | 2 mm | 3 | |
| May 5 | Patchy rain possible | 15° /7° | 6.3 mm | 4 | |
| May 6 | Overcast | 20° /10° | 0.8 mm | 5 | |
| May 7 | Partly cloudy | 23° /12° | 1.7 mm | 6 | |
| May 8 | Overcast | 26° /15° | 0.3 mm | 6 | |
| May 9 | Heavy rain at times | 18° /12° | 3.6 mm | 5 | |
| May 10 | Sunny | 18° /9° | 5.5 mm | 5 | |
| May 11 | Partly cloudy | 21° /9° | 0.1 mm | 6 | |
| May 12 | Sunny | 21° /11° | 4.9 mm | 6 | |
| May 13 | Patchy rain possible | 21° /12° | 0.1 mm | 5 | |
| May 14 | Overcast | 21° /13° | 2.7 mm | 5 | |
| May 15 | Sunny | 20° /12° | 3.5 mm | 5 | |
| May 16 | Overcast | 20° /12° | 1.3 mm | 5 | |
| May 17 | Sunny | 21° /13° | 0 mm | 6 | |
| May 18 | Sunny | 21° /10° | 0 mm | 6 | |
| May 19 | Overcast | 23° /11° | 0 mm | 5 | |
| May 20 | Heavy rain at times | 23° /13° | 1.1 mm | 6 | |
| May 21 | Cloudy | 26° /13° | 0.2 mm | 7 | |
| May 22 | Cloudy | 28° /13° | 1.2 mm | 7 | |
| May 23 | Partly cloudy | 25° /15° | 2 mm | 6 | |
| May 24 | Overcast | 27° /13° | 0.2 mm | 6 | |
| May 25 | Sunny | 25° /14° | 0.1 mm | 6 | |
| May 26 | Sunny | 27° /14° | 2.1 mm | 7 | |
| May 27 | Sunny | 24° /14° | 13.2 mm | 6 | |
| May 28 | Overcast | 25° /14° | 0 mm | 6 | |
| May 29 | Sunny | 26° /14° | 1.5 mm | 6 | |
| May 30 | Sunny | 23° /13° | 1.3 mm | 6 | |
| May 31 | Partly cloudy | 26° /10° | 0.1 mm | 7 | |
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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.
Philadelphia in May - FAQ
What are the expected maximum and minimum temperatures in Philadelphia during May?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Philadelphia during May?
Moderate rainfall is anticipated in Philadelphia during May, with a total of 88.7 mm spread over approximately 4 days. Considering plans for rainy days is advisable.
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.
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