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 significantly, with a minimum of 4°C (39°F) and a maximum of 34°C (93°F). Expect approximately 174 mm (6.9 in) of precipitation over 15 days, and enjoy the humidity level averaging around 83%.

May Temperature in Salem

In May in Salem, the average temperature is 20°C (68°F). The maximum can reach 34°C (93°F), while the minimum can be as low as 4°C (39°F). Overall, this month offers a pleasant variety of temperatures, making it an excellent time for travelers to explore the region.

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 4°C (39°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 174 mm (6.9 in) over a period of 15 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 174 mm (6.9 inches) of precipitation spread over approximately 15 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 83%. With an average temperature of 20°C (68°F), this humidity feels like a warm, heavy blanket enveloping you, making it feel much warmer than it is. Traveling in such conditions can be quite taxing, as the air feels thick, often leading to a sense of exhaustion and requiring frequent breaks to seek shade or hydration.

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 83%, 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 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 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 10, which falls under the very high 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	3°C (38°F)	83 mm (3.3 inches)	83%	moderate
February Weather	5°C (42°F)	115 mm (4.5 inches)	81%	high
March Weather	11°C (52°F)	144 mm (5.7 inches)	80%	very high
April Weather	14°C (58°F)	166 mm (6.5 inches)	80%	very high
May Weather	20°C (68°F)	174 mm (6.9 inches)	83%	very high
June Weather	25°C (77°F)	83 mm (3.3 inches)	83%	extreme
July Weather	27°C (81°F)	82 mm (3.2 inches)	76%	extreme
August Weather	26°C (79°F)	108 mm (4.2 inches)	69%	very high
September Weather	23°C (75°F)	76 mm (3.0 inches)	68%	very high
October Weather	16°C (62°F)	110 mm (4.3 inches)	72%	high
November Weather	9°C (48°F)	81 mm (3.2 inches)	83%	moderate
December Weather	6°C (44°F)	89 mm (3.5 inches)	86%	moderate