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May Weather in Seneca, United States

Last updated: June 24, 2025

In Seneca, United States, the weather in May brings an average temperature of 20°C (67°F), creating a pleasant climate throughout the month. Expect minimum temperatures to drop to 4°C (39°F), with highs reaching up to 33°C (92°F). Additionally, be prepared for precipitation of 173 mm (6.8 in) over 13 days, and a relatively high average humidity of 83%.

May Temperature in Seneca

In May in Seneca, the average temperature is 20°C (67°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 4°C (39°F). This makes Seneca a great destination for travelers seeking pleasant weather with the chance to experience both warm days and cooler evenings.

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 20°C (67°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec373951576777807874604843
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 precipitation amount is 173 mm (6.8 in) over a period of 13 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 173 mm (6.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec85781471511739395113691486153
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 83%. With an average temperature of 20°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities uncomfortable if you're not prepared. Travelers may find themselves needing frequent breaks in the shade or air conditioning to stay refreshed and energized as they explore.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather3°C (37°F)85 mm (3.4 inches)81%moderate
February Weather4°C (40°F)78 mm (3.1 inches)78%high
March Weather11°C (51°F)146 mm (5.8 inches)76%high
April Weather14°C (57°F)151 mm (6.0 inches)78%very high
May Weather20°C (67°F)173 mm (6.8 inches)83%very high
June Weather25°C (77°F)93 mm (3.6 inches)83%extreme
July Weather27°C (80°F)95 mm (3.7 inches)78%extreme
August Weather25°C (78°F)113 mm (4.5 inches)68%very high
September Weather23°C (74°F)69 mm (2.7 inches)64%very high
October Weather16°C (60°F)148 mm (5.8 inches)70%high
November Weather9°C (48°F)61 mm (2.4 inches)83%moderate
December Weather6°C (43°F)53 mm (2.1 inches)87%moderate

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