Last updated: June 24, 2025
In May, the average temperature in Lancaster, United States hovers around 19°C (67°F), offering a pleasant climate for visitors. However, be prepared for a range, with minimum temperatures dipping to 0°C (32°F) and soaring to a maximum of 34°C (93°F). During this month, expect 135 mm (5.3 in) of precipitation over 14 days, contributing to the region's average humidity of 84%. Don't forget your umbrella!
In May in Lancaster, the average temperature is 19°C (67°F). Maximum temperatures can reach 34°C (93°F) while minimums can drop to as low as 0°C (32°F). This variability makes it essential for travelers to pack accordingly, anticipating both warm days and cooler nights.
In Lancaster in May, the precipitation amount is 135 mm (5.3 in) over a period of 14 days.
In Lancaster in May humidity is 84%. With an average temperature of 19°C (67°F), this humidity feels like a warm, sticky embrace that can make traveling somewhat uncomfortable, as the air becomes thick and heavy, often leaving you feeling fatigued and in need of constant hydration.
In Lancaster in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Lancaster.
UV Risk Categories
Weather in Lancaster varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Lancaster, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 3°C (37°F) | 97 mm (3.8 inches) | 88% | moderate |
| February Weather | 6°C (42°F) | 167 mm (6.6 inches) | 88% | high |
| March Weather | 9°C (49°F) | 136 mm (5.4 inches) | 87% | high |
| April Weather | 13°C (56°F) | 138 mm (5.4 inches) | 84% | very high |
| May Weather | 19°C (67°F) | 135 mm (5.3 inches) | 84% | very high |
| June Weather | 23°C (73°F) | 158 mm (6.2 inches) | 83% | extreme |
| July Weather | 25°C (78°F) | 102 mm (4.0 inches) | 79% | extreme |
| August Weather | 24°C (76°F) | 114 mm (4.5 inches) | 66% | very high |
| September Weather | 22°C (71°F) | 126 mm (4.9 inches) | 67% | very high |
| October Weather | 16°C (61°F) | 117 mm (4.6 inches) | 76% | high |
| November Weather | 8°C (46°F) | 85 mm (3.3 inches) | 89% | moderate |
| December Weather | 5°C (42°F) | 140 mm (5.5 inches) | 88% | moderate |