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May Weather in Seneca, United States

Last updated: June 24, 2025

In May, the average temperature in Seneca, United States hovers around 21°C (70°F). While you might experience a cool minimum of 5°C (41°F), highs can soar to 34°C (94°F). Prepare for some rain, as the area receives an average precipitation of 141 mm (5.5 in) over 11 days, coupled with a humid 85% atmosphere.

May Temperature in Seneca

In May in Seneca, the average temperature is 21°C (70°F). Maximums can reach 34°C (94°F), while minimums can drop as low as 5°C (41°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities, while also being prepared for potential temperature fluctuations.

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

The chart illustrates May temperature patterns in Seneca, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seneca, May typically has an average temperature of 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec444954616975797874645147
Data source: Temperature data for Seneca 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 Seneca

In Seneca in May, the total precipitation amount is 141 mm (5.5 in), which falls over the course of 11 days.

May Precipitation Trends in Seneca

The chart displays monthly precipitation patterns in Seneca, 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 Seneca, May typically receives around 141 mm (5.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec117167121136141929212713216797151
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Seneca

In Seneca in May, humidity is 85%. With an average temperature of 21°C (70°F), this humidity feels like a warm, heavy blanket enveloping you, making travel feel slightly stifling and requiring frequent breaks to refresh in the shade or near water.

May Average Humidity in Seneca

This chart illustrates the average monthly humidity levels in Seneca, 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 Seneca is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Seneca

In Seneca 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 Seneca.

Maximum UV Index Levels in Seneca for May

The chart shows the monthly maximum UV Index (UVI) for Seneca 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 Seneca typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47811111111109864
Data source: Seneca 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 Seneca Compares to Other Months

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

This table compares monthly weather conditions in Seneca, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)117 mm (4.6 inches)86%moderate
February Weather9°C (49°F)167 mm (6.6 inches)86%high
March Weather12°C (54°F)121 mm (4.7 inches)86%very high
April Weather16°C (61°F)136 mm (5.4 inches)82%extreme
May Weather21°C (70°F)141 mm (5.5 inches)85%extreme
June Weather24°C (76°F)92 mm (3.6 inches)85%extreme
July Weather26°C (80°F)92 mm (3.6 inches)83%extreme
August Weather26°C (78°F)127 mm (5.0 inches)76%very high
September Weather23°C (74°F)132 mm (5.2 inches)76%very high
October Weather18°C (65°F)167 mm (6.6 inches)80%very high
November Weather11°C (52°F)97 mm (3.8 inches)88%high
December Weather8°C (47°F)151 mm (6.0 inches)88%moderate

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