May Weather in Salem, United States

Last updated: June 24, 2025

In May, the average temperature in Salem, United States is a pleasant 20°C (68°F). However, temperatures can vary quite a bit, dipping as low as 3°C (37°F) and soaring to a maximum of 34°C (93°F). Expect around 160 mm (6.3 in) of precipitation over 13 days, contributing to an average humidity level of 80%. Enjoy the diverse weather this month brings!

May Temperature in Salem

In May, in Salem, the average temperature is 20°C (68°F), with maximums reaching 34°C (93°F) and minimums dropping as low as 3°C (37°F). This makes Salem a great destination for travelers looking to enjoy mild weather with the possibility of warm afternoons and cool evenings.

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

The chart illustrates May temperature patterns in Salem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Salem, May typically has an average temperature of 20°C (68°F), with highs reaching up to 34°C (93°F) and lows dropping to around 3°C (37°F).

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

May Precipitation in Salem

In Salem in May, the precipitation amount is 160 mm (6.3 in) over a span of 13 days.

May Precipitation Trends in Salem

The chart displays monthly precipitation patterns in Salem, 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 Salem, May typically receives around 160 mm (6.3 inches) of precipitation spread over approximately 13 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 Salem

In Salem in May, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

May Average Humidity in Salem

This chart illustrates the average monthly humidity levels in Salem, 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 Salem is approximately 80%, 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 Salem

In Salem 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 Salem.

Maximum UV Index Levels in Salem for May

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

Data source: Salem 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 Salem Compares to Other Months

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

This table compares monthly weather conditions in Salem, 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)	83 mm (3.3 inches)	84%	moderate
February Weather	2°C (36°F)	89 mm (3.5 inches)	82%	moderate
March Weather	8°C (47°F)	138 mm (5.4 inches)	84%	high
April Weather	13°C (56°F)	127 mm (5.0 inches)	83%	very high
May Weather	20°C (68°F)	160 mm (6.3 inches)	80%	extreme
June Weather	25°C (77°F)	110 mm (4.3 inches)	83%	extreme
July Weather	26°C (80°F)	95 mm (3.8 inches)	82%	very high
August Weather	25°C (76°F)	100 mm (3.9 inches)	82%	very high
September Weather	22°C (73°F)	64 mm (2.5 inches)	79%	very high
October Weather	15°C (60°F)	117 mm (4.6 inches)	79%	high
November Weather	7°C (44°F)	84 mm (3.3 inches)	88%	moderate
December Weather	4°C (39°F)	79 mm (3.1 inches)	87%	moderate