May Weather in Salem, United States

Last updated: June 24, 2025

In May, the average temperature in Salem, United States is a pleasant 23°C (74°F). However, be prepared for temperature fluctuations, with possible lows of 4°C (40°F) and highs reaching up to 37°C (98°F). Thankfully, precipitation is minimal, averaging just 4 mm (0.2 in) over 0 days, while the average humidity remains comfortable at 54%. Enjoy the delightful climate!

May Temperature in Salem

In May in Salem, the average temperature is 23°C (74°F), with maximums reaching 37°C (98°F) and minimums dropping to as low as 4°C (40°F). Travelers should be prepared for both warm days and cooler nights during this time.

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 23°C (74°F), with highs reaching up to 37°C (98°F) and lows dropping to around 4°C (40°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 4 mm (0.2 in) over the course of 0 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 4 mm (0.2 inches) of precipitation spread over approximately 0 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 54%. With an average temperature of 23°C (74°F), this humidity feels like a comfortable and pleasant atmosphere for traveling, creating a mild environment that is neither too dry nor overly damp, making outdoor exploration enjoyable.

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 54%, 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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For 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 12, 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	7°C (45°F)	14 mm (0.6 inches)	79%	moderate
February Weather	9°C (49°F)	18 mm (0.7 inches)	79%	high
March Weather	14°C (57°F)	14 mm (0.6 inches)	65%	very high
April Weather	19°C (66°F)	4 mm (0.1 inches)	55%	extreme
May Weather	23°C (74°F)	4 mm (0.2 inches)	54%	extreme
June Weather	28°C (83°F)	22 mm (0.9 inches)	53%	extreme
July Weather	28°C (83°F)	30 mm (1.2 inches)	55%	extreme
August Weather	28°C (82°F)	27 mm (1.1 inches)	57%	extreme
September Weather	25°C (77°F)	28 mm (1.1 inches)	70%	extreme
October Weather	18°C (65°F)	32 mm (1.3 inches)	75%	very high
November Weather	12°C (55°F)	21 mm (0.8 inches)	83%	high
December Weather	8°C (46°F)	11 mm (0.4 inches)	82%	moderate