May Weather in Williamsport, United States

Last updated: June 24, 2025

In Williamsport, United States, the average temperature in May hovers around 18°C (65°F), offering a comfortable climate for visitors. However, temperatures can vary widely, with a minimum of 0°C (32°F) and a maximum of 32°C (90°F). Expect some wet days, as 127 mm (5.0 in) of precipitation falls over approximately 14 days. Additionally, the average humidity is a high 81%, contributing to a lush and vibrant atmosphere.

May Temperature in Williamsport

In May in Williamsport, the average temperature is 18°C (65°F). Maximums can reach 32°C (90°F), and minimums can be as low as 0°C (32°F). This makes Williamsport an ideal destination for travelers seeking a blend of warm days and cooler nights.

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

The chart illustrates May temperature patterns in Williamsport, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Williamsport, May typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 0°C (32°F).

Data source: Temperature data for Williamsport generated using information from the Copernicus Climate Change Service.

May Precipitation in Williamsport

In Williamsport in May, the total precipitation amount is 127 mm (5.0 in), occurring over the course of 14 days.

May Precipitation Trends in Williamsport

The chart displays monthly precipitation patterns in Williamsport, 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 Williamsport, May typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Williamsport

In Williamsport in May, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

May Average Humidity in Williamsport

This chart illustrates the average monthly humidity levels in Williamsport, 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 Williamsport is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Williamsport

In Williamsport 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 Williamsport.

Maximum UV Index Levels in Williamsport for May

The chart shows the monthly maximum UV Index (UVI) for Williamsport 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 Williamsport typically reaches 10, which falls under the very high exposure category.

Data source: Williamsport 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 Williamsport Compares to Other Months

Weather in Williamsport varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Williamsport, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Williamsport, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	81 mm (3.2 inches)	88%	moderate
February Weather	2°C (37°F)	109 mm (4.3 inches)	88%	moderate
March Weather	7°C (44°F)	123 mm (4.8 inches)	87%	high
April Weather	12°C (53°F)	126 mm (5.0 inches)	85%	very high
May Weather	18°C (65°F)	127 mm (5.0 inches)	81%	very high
June Weather	22°C (73°F)	130 mm (5.1 inches)	82%	very high
July Weather	25°C (77°F)	109 mm (4.3 inches)	81%	very high
August Weather	24°C (75°F)	91 mm (3.6 inches)	73%	very high
September Weather	21°C (70°F)	91 mm (3.6 inches)	73%	very high
October Weather	15°C (59°F)	102 mm (4.0 inches)	78%	high
November Weather	6°C (43°F)	96 mm (3.8 inches)	89%	moderate
December Weather	3°C (38°F)	104 mm (4.1 inches)	87%	moderate