Pennsylvania (Philadelphia)
May
Weather in Pennsylvania for May 2026
Your guide to Pennsylvania weather in May - trends and predictions
Until now, May 2026 in Pennsylvania is slightly cooler than the historical average by -1.1 °F.
The forecast for the coming days of May 2026 predicts a temperature of 26.4 °F , which is warmer than usual.
In general, the average temperature in Pennsylvania at the beginning of May is 19.7 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 25.3 °F by the end of May.
Pennsylvania experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 162.6 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
6
Dry days
25
Rainy days
0
Snow days
22°/13°
Temperatures
16 km/h
Avg max wind
67 %
Avg humidity
Pennsylvania Weather May
Move between months or click on a day
What’s the Weather Like in Pennsylvania This May?
Discover the average temperatures and weather trends across Pennsylvania’s cities this May.
Temperatures trend during May in Pennsylvania
See the weather trend as well as the moving average line
May weather in Pennsylvania day by day
Click on a date for more information
| 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 | Patchy rain possible | 18° /12° | 3.8 mm | 5.8 | |
| May 15 |  Cloudy | 17° /10° | 0.1 mm | 0.5 | |
| May 16 | Sunny | 26° /10° | 0 mm | 5 | |
| May 17 | Patchy rain possible | 27° /16° | 2 mm | 5 | |
| May 18 | Sunny | 32° /18° | 0 mm | 6 | |
| May 19 | Sunny | 32° /17° | 0 mm | 6 | |
| May 20 | Patchy rain possible | 29° /17° | 0.3 mm | 5 | |
| May 21 | Overcast | 22° /14° | 0 mm | 4 | |
| May 22 | Sunny | 25° /15° | 0 mm | 5 | |
| May 23 | Patchy rain possible | 26° /13° | 0.3 mm | 4 | |
| May 24 | Patchy rain possible | 32° /16° | 2.7 mm | 5 | |
| May 25 | Patchy rain possible | 30° /18° | 0.5 mm | 5 | |
| May 26 | Patchy rain possible | 32° /19° | 0.8 mm | 6 | |
| May 27 | Patchy rain possible | 21° /14° | 3.7 mm | 4 | |
| May 28 | Moderate or heavy rain shower | 22° /13° | 15.8 mm | 5 | |
| May 29 | Sunny | 23° /12° | 6.8 mm | 5 | |
| May 30 | Sunny | 23° /13° | 8.4 mm | 5 | |
| May 31 | Partly cloudy | 26° /13° | 12.3 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Pennsylvania 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 Pennsylvania forecast closer to your planned date for the most up-to-date weather information.
Change Month
Pennsylvania in May - FAQ
What are the expected maximum and minimum temperatures in Pennsylvania 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 Pennsylvania during May?
Significant rainfall exceeding 162.6 mm is expected in Pennsylvania during May, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Pennsylvania during May?
The average wind speed in Pennsylvania during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Pennsylvania
Explore the daily rainfall trends and prepare for Pennsylvanias May weather 💧
Typically, Pennsylvania has 25 rainy days in May with a total of 162.6 mm of rainfall.
UV exposure in Pennsylvania during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Counties in Pennsylvania
Select a county for an accurate weather forecast
Top locations in Pennsylvania
Select a location for an accurate weather forecast
More Locations Quick links
More Pennsylvania weather pages
You are here
Where is Pennsylvania?Get accurate weather forecasts for Pennsylvania, located at latitude 39.952 and longitude -75.164. Stay updated with localized weather information tailored for Pennsylvania.
Found a mistake?
We appreciate your attention to details. Tell us here.