Harrisburg (PA)
May
Weather in Harrisburg, Pennsylvania for May 2026
Your guide to Harrisburg weather in May - trends and predictions
Expect cooler weather in the next days in Harrisburg with the forecast suggesting a temperature of 18.6 °F, lower than the historical average.
In general, the average temperature in Harrisburg at the beginning of May is 20.7 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 21.7 °F by the end of May.
Harrisburg experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 272.1 mm.
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Temperatures
Rain 🌧️
More
9
Dry days
22
Rainy days
0
Snow days
20°/12°
Temperatures
16 km/h
Avg max wind
79 %
Avg humidity
Harrisburg Weather May
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Temperatures trend during May in Harrisburg
See the weather trend as well as the moving average line
May weather in Harrisburg day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 20° /9° | 1.2 mm | 6 | |
| May 2 |  Overcast | 22° /10° | 0.2 mm | 7 | |
| May 3 |  Partly cloudy | 22° /9° | 0 mm | 7 | |
| May 4 |  Light rain | 18° /9° | 28 mm | 5 | |
| May 5 | Light rain | 20° /12° | 26.1 mm | 5 | |
| May 6 |  Fog | 21° /13° | 7.9 mm | 4 | |
| May 7 | Light rain shower | 22° /13° | 5.2 mm | 5 | |
| May 8 | Patchy rain possible | 16° /5° | 0.3 mm | 0.7 | |
| May 9 |  Moderate rain | 17° /8° | 5 mm | 3 | |
| May 10 | Moderate rain | 22° /9° | 9 mm | 3 | |
| May 11 | Moderate rain | 16° /8° | 7.6 mm | 3 | |
| May 12 |  Sunny | 16° /2° | 0 mm | 3 | |
| May 13 | Patchy rain possible | 14° /7° | 4.1 mm | 3 | |
| May 14 | Patchy rain possible | 14° /6° | 0.1 mm | 3 | |
| May 15 | Patchy rain possible | 17° /4° | 1.4 mm | 3 | |
| May 16 | Patchy rain possible | 15° /9° | 1.8 mm | 3 | |
| May 17 | Sunny | 22° /7° | 0 mm | 4 | |
| May 18 | Sunny | 24° /9° | 0 mm | 5 | |
| May 19 | Patchy rain possible | 26° /12° | 3 mm | 4 | |
| May 20 | Patchy rain possible | 23° /14° | 0.2 mm | 4 | |
| May 21 | Mist | 20° /11° | 30.6 mm | 5 | |
| May 22 |  Thundery outbreaks possible | 21° /11° | 8.7 mm | 5 | |
| May 23 | Light rain shower | 19° /12° | 5.5 mm | 5 | |
| May 24 | Sunny | 21° /11° | 0.1 mm | 6 | |
| May 25 |  Patchy light rain with thunder | 24° /11° | 2.5 mm | 6 | |
| May 26 | Thundery outbreaks possible | 24° /13° | 0.8 mm | 6 | |
| May 27 | Light rain shower | 23° /14° | 14.4 mm | 6 | |
| May 28 | Light rain shower | 19° /11° | 23.5 mm | 4 | |
| May 29 | Patchy light rain with thunder | 21° /11° | 5.5 mm | 5 | |
| May 30 | Partly cloudy | 20° /13° | 8 mm | 6 | |
| May 31 | Sunny | 21° /10° | 1.6 mm | 6 | |
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Important Notice
Our weather forecast for Harrisburg 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 Harrisburg forecast closer to your planned date for the most up-to-date weather information.
Change Month
Harrisburg in May - FAQ
What are the expected maximum and minimum temperatures in Harrisburg during May?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Harrisburg during May?
Significant rainfall exceeding 272.1 mm is expected in Harrisburg during May, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Harrisburg during May?
The average wind speed in Harrisburg during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Harrisburg
Explore the daily rainfall trends and prepare for Harrisburgs May weather 💧
Typically, Harrisburg has 22 rainy days in May with a total of 272.1 mm of rainfall.
UV exposure in Harrisburg during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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