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May Weather in Lancaster, United States

Last updated: June 24, 2025

In Lancaster, United States, the average temperature in May is a pleasant 24°C (75°F), with a minimum of 7°C (45°F) and a maximum reaching up to 35°C (96°F). Expect around 178 mm (7.0 in) of precipitation spread over 13 days, contributing to an average humidity of 81%. This makes for a unique climate that blends warmth with occasional rain, perfect for embracing the beauty of the season!

May Temperature in Lancaster

In May in Lancaster, the average temperature is 24°C (75°F), with maximums reaching 35°C (96°F) and minimums dipping as low as 7°C (45°F). This variation in temperature makes Lancaster an ideal destination for travelers seeking both warmth and cooler evenings.

May Weather in Lancaster: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Lancaster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lancaster, May typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (96°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec485061667582858580685752
Data source: Temperature data for Lancaster generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Lancaster

In Lancaster in May, the precipitation amount is 178 mm (7.0 in) over a duration of 13 days.

May Precipitation Trends in Lancaster

The chart displays monthly precipitation patterns in Lancaster, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Lancaster, May typically receives around 178 mm (7.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec64101100130178975892881455368
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Lancaster

In Lancaster in May humidity is 81%. With an average temperature of 24°C (75°F), this humidity feels like a warm, thick blanket enveloping you, making traveling a bit sticky and sweaty, yet still inviting for those who enjoy the rich, tropical atmosphere.

May Average Humidity in Lancaster

This chart illustrates the average monthly humidity levels in Lancaster, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Lancaster is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%79%78%78%81%78%73%66%65%72%82%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Lancaster

In Lancaster in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Lancaster.

Maximum UV Index Levels in Lancaster for May

The chart shows the monthly maximum UV Index (UVI) for Lancaster in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Lancaster typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101111111110864
Data source: Lancaster May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How May Weather in Lancaster Compares to Other Months

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.

This table compares monthly weather conditions in Lancaster, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)64 mm (2.5 inches)80%moderate
February Weather10°C (50°F)101 mm (4.0 inches)79%high
March Weather16°C (61°F)100 mm (3.9 inches)78%very high
April Weather19°C (66°F)130 mm (5.1 inches)78%very high
May Weather24°C (75°F)178 mm (7.0 inches)81%extreme
June Weather28°C (82°F)97 mm (3.8 inches)78%extreme
July Weather30°C (85°F)58 mm (2.3 inches)73%extreme
August Weather29°C (85°F)92 mm (3.6 inches)66%extreme
September Weather26°C (80°F)88 mm (3.5 inches)65%very high
October Weather20°C (69°F)145 mm (5.7 inches)72%very high
November Weather14°C (57°F)53 mm (2.1 inches)82%high
December Weather11°C (53°F)68 mm (2.7 inches)87%moderate

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