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May Weather in Salem, United States

Last updated: June 24, 2025

In May, the average temperature in Salem, United States hovers around 16°C (61°F). While temperatures can dip as low as -2°C (29°F), you might also experience highs of 32°C (90°F). Be prepared for 126 mm (5.0 in) of precipitation spread over 15 days, resulting in an average humidity level of 81%. Make sure to pack accordingly for this diverse weather!

May Temperature in Salem

In May in Salem, the average temperature is 16°C (61°F). The maximum can reach 32°C (90°F), while the minimum can drop to as low as -2°C (29°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm days and chilly nights.

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 16°C (61°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec293340506169747267564135
Data source: Temperature data for Salem generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Salem

In Salem in May, the precipitation amount is 126 mm (5.0 in) spread over 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 126 mm (5.0 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec90991061331261311341011101159595
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Salem

In Salem in May, humidity is 81%. With an average temperature of 16°C (61°F), this humidity feels like a warm, heavy blanket wrapping around you as you explore the sights, making it essential to stay hydrated and take regular breaks in the shade.

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 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
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.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)90 mm (3.5 inches)88%moderate
February Weather0°C (33°F)99 mm (3.9 inches)88%moderate
March Weather4°C (40°F)106 mm (4.2 inches)87%high
April Weather10°C (50°F)133 mm (5.2 inches)87%very high
May Weather16°C (61°F)126 mm (5.0 inches)81%very high
June Weather21°C (70°F)131 mm (5.2 inches)83%very high
July Weather23°C (74°F)134 mm (5.3 inches)82%very high
August Weather22°C (72°F)101 mm (4.0 inches)76%very high
September Weather19°C (67°F)110 mm (4.3 inches)77%very high
October Weather13°C (56°F)115 mm (4.5 inches)82%high
November Weather5°C (41°F)95 mm (3.7 inches)89%moderate
December Weather2°C (35°F)95 mm (3.7 inches)86%low

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