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May Weather in South Dayton, United States

Last updated: June 24, 2025

In May, the average temperature in South Dayton, United States hovers around 14°C (57°F). However, temperatures can range from a brisk -4°C (26°F) to a warm 31°C (88°F). Expect 135 mm (5.3 in) of precipitation spread over 16 days, with the average humidity at a comfortable 82%. Stay prepared for a variety of weather conditions!

May Temperature in South Dayton

In May in South Dayton, the average temperature is 14°C (57°F). Maximum temperatures can reach 31°C (88°F), while minimums can drop as low as -4°C (26°F). Be prepared for a wide range of temperatures when traveling during this month.

May Weather in South Dayton: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in South Dayton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In South Dayton, May typically has an average temperature of 14°C (57°F), with highs reaching up to 31°C (88°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec252834445765706862523731
Data source: Temperature data for South Dayton 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 South Dayton

In South Dayton in May, precipitation amounts to 135 mm (5.3 in) over the course of 16 days.

May Precipitation Trends in South Dayton

The chart displays monthly precipitation patterns in South Dayton, 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 South Dayton, May typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec10211010313013514615411389148125118
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in South Dayton

In South Dayton in May, humidity is 82%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making outdoor activities uncomfortable and travel more challenging due to the heavy, damp air.

May Average Humidity in South Dayton

This chart illustrates the average monthly humidity levels in South Dayton, 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 South Dayton is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in South Dayton

In South Dayton in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in South Dayton.

Maximum UV Index Levels in South Dayton for May

The chart shows the monthly maximum UV Index (UVI) for South Dayton 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 South Dayton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689101098642
Data source: South Dayton 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 South Dayton Compares to Other Months

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

This table compares monthly weather conditions in South Dayton, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)102 mm (4.0 inches)91%moderate
February Weather-2°C (28°F)110 mm (4.3 inches)91%moderate
March Weather1°C (34°F)103 mm (4.1 inches)88%high
April Weather7°C (45°F)130 mm (5.1 inches)88%very high
May Weather14°C (57°F)135 mm (5.3 inches)82%very high
June Weather18°C (65°F)146 mm (5.7 inches)79%very high
July Weather21°C (70°F)154 mm (6.1 inches)77%very high
August Weather20°C (68°F)113 mm (4.4 inches)72%very high
September Weather17°C (62°F)88 mm (3.5 inches)76%very high
October Weather11°C (52°F)147 mm (5.8 inches)83%high
November Weather3°C (37°F)125 mm (4.9 inches)88%moderate
December Weather-1°C (31°F)118 mm (4.6 inches)87%low

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