Lancaster County (Lancaster)
May
Weather in Lancaster County, Pennsylvania for May 2026
Your guide to Lancaster County weather in May - trends and predictions
In general, the average temperature in Lancaster County at the beginning of May is 23.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.7 °F by the end of May.
Lancaster County in May brings notable rainfall, with an average of 16 rainy days and a total precipitation of 183.9 mm.
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Temperatures
Rain 🌧️
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15
Dry days
16
Rainy days
0
Snow days
21°/12°
Temperatures
20 km/h
Avg max wind
77 %
Avg humidity
Lancaster County Weather May
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Temperatures trend during May in Lancaster County
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May weather in Lancaster County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Cloudy | 24° /9° | 0 mm | 5 | |
| May 2 |  Overcast | 28° /15° | 0.1 mm | 6 | |
| May 3 |  Moderate or heavy rain shower | 27° /16° | 17.5 mm | 6 | |
| May 4 | Moderate or heavy rain shower | 21° /17° | 9.3 mm | 5 | |
| May 5 | Moderate or heavy rain shower | 20° /16° | 14.2 mm | 5 | |
| May 6 | Moderate or heavy rain shower | 21° /14° | 7.3 mm | 5 | |
| May 7 | Cloudy | 23° /12° | 0 mm | 5 | |
| May 8 |  Patchy rain possible | 23° /12° | 7.3 mm | 5 | |
| May 9 | Moderate or heavy rain shower | 13° /9° | 13 mm | 3 | |
| May 10 |  Partly cloudy | 21° /7° | 0 mm | 6 | |
| May 11 |  Sunny | 23° /10° | 0 mm | 6 | |
| May 12 | Cloudy | 24° /11° | 0.1 mm | 5 | |
| May 13 | Moderate or heavy rain shower | 20° /15° | 18.9 mm | 5 | |
| May 14 | Moderate rain at times | 19° /14° | 4.7 mm | 4 | |
| May 15 | Moderate rain at times | 24° /16° | 2.2 mm | 5 | |
| May 16 | Moderate or heavy rain shower | 26° /15° | 4.3 mm | 6 | |
| May 17 | Overcast | 27° /18° | 0 mm | 6 | |
| May 18 | Patchy rain possible | 20° /13° | 0.4 mm | 5 | |
| May 19 | Partly cloudy | 21° /11° | 0 mm | 6 | |
| May 20 | Overcast | 17° /7° | 0 mm | 4 | |
| May 21 |  Heavy rain at times | 13° /10° | 16 mm | 3 | |
| May 22 | Moderate or heavy rain shower | 14° /10° | 11 mm | 3 | |
| May 23 | Moderate or heavy rain shower | 16° /8° | 4.8 mm | 4 | |
| May 24 | Patchy rain possible | 15° /8° | 0.4 mm | 4 | |
| May 25 | Partly cloudy | 20° /5° | 0 mm | 5 | |
| May 26 | Partly cloudy | 20° /8° | 0 mm | 6 | |
| May 27 | Overcast | 21° /9° | 0 mm | 5 | |
| May 28 | Moderate or heavy rain shower | 12° /10° | 52.4 mm | 3 | |
| May 29 |  Fog | 23° /12° | 0 mm | 5 | |
| May 30 | Overcast | 21° /13° | 80.9 mm | 5 | |
| May 31 | Partly cloudy | 21° /9° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Lancaster 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 Lancaster County forecast closer to your planned date for the most up-to-date weather information.
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Lancaster County in May - FAQ
What are the expected maximum and minimum temperatures in Lancaster County during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Lancaster County during May?
Significant rainfall exceeding 183.9 mm is expected in Lancaster County during May, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Lancaster County during May?
The average wind speed in Lancaster County during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Lancaster County
Explore the daily rainfall trends and prepare for Lancaster Countys May weather 💧
UV exposure in Lancaster County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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