May Weather in Bethlehem, United States

Last updated: June 24, 2025

In Bethlehem, United States, the average temperature in May hovers around 21°C (71°F), offering a pleasant climate for outdoor activities. Expect temperature fluctuations, with minimums dipping to 5°C (41°F) and maximums soaring to 34°C (93°F). The month brings about 125 mm (4.9 in) of precipitation over 11 days, contributing to an average humidity of 81%, creating a vibrant and lush environment.

May Temperature in Bethlehem

In May in Bethlehem, the average temperature is 21°C (71°F). The maximum can reach 34°C (93°F) and the minimum can be as low as 5°C (41°F). This makes it a great time for travelers to enjoy a range of outdoor activities while being prepared for varying temperatures.

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

The chart illustrates May temperature patterns in Bethlehem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bethlehem, May typically has an average temperature of 21°C (71°F), with highs reaching up to 34°C (93°F) and lows dropping to around 5°C (41°F).

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

May Precipitation in Bethlehem

In Bethlehem in May, the precipitation amount is 125 mm (4.9 in) over the course of 11 days.

May Precipitation Trends in Bethlehem

The chart displays monthly precipitation patterns in Bethlehem, 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 Bethlehem, May typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 11 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 Bethlehem

In Bethlehem in May, humidity is 81%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that makes traveling feel both refreshing and slightly heavy, often leading to a sticky sensation that can quickly deplete your energy.

May Average Humidity in Bethlehem

This chart illustrates the average monthly humidity levels in Bethlehem, 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 Bethlehem 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 Bethlehem

In Bethlehem 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 Bethlehem.

Maximum UV Index Levels in Bethlehem for May

The chart shows the monthly maximum UV Index (UVI) for Bethlehem 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 Bethlehem typically reaches 11, which falls under the extreme exposure category.

Data source: Bethlehem 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 Bethlehem Compares to Other Months

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

This table compares monthly weather conditions in Bethlehem, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (46°F)	108 mm (4.3 inches)	86%	moderate
February Weather	10°C (51°F)	147 mm (5.8 inches)	84%	high
March Weather	13°C (56°F)	130 mm (5.1 inches)	83%	very high
April Weather	17°C (62°F)	123 mm (4.8 inches)	81%	very high
May Weather	21°C (71°F)	125 mm (4.9 inches)	81%	extreme
June Weather	24°C (76°F)	127 mm (5.0 inches)	81%	extreme
July Weather	26°C (79°F)	118 mm (4.7 inches)	83%	extreme
August Weather	26°C (78°F)	147 mm (5.8 inches)	81%	very high
September Weather	23°C (75°F)	116 mm (4.6 inches)	82%	very high
October Weather	19°C (66°F)	141 mm (5.5 inches)	78%	very high
November Weather	11°C (52°F)	80 mm (3.1 inches)	86%	high
December Weather	9°C (48°F)	135 mm (5.3 inches)	89%	moderate