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May Weather in Seneca, United States

Last updated: August 27, 2025

In Seneca, United States, the average temperature in May hovers around 18°C (65°F). During this time, temperatures can swing from a cool 2°C (35°F) to a sizzling 36°C (97°F). Be prepared for 210 mm (8.3 in) of precipitation over approximately 14 days, contributing to an average humidity level of 82%.

May Temperature in Seneca

In May in Seneca, the average temperature is 18°C (65°F). Maximums can reach 36°C (97°F), and minimums can be as low as 2°C (35°F). This climate makes Seneca a great destination for travelers seeking to experience a range of temperatures, from warm days to cooler nights.

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 18°C (65°F), with highs reaching up to 36°C (97°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec293044536477797671554336
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 210 mm (8.3 in) over a span of 14 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 210 mm (8.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec3431968421010072124711233729
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 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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 Weather-2°C (29°F)34 mm (1.3 inches)76%moderate
February Weather-1°C (30°F)31 mm (1.2 inches)77%moderate
March Weather7°C (45°F)96 mm (3.8 inches)70%high
April Weather11°C (53°F)84 mm (3.3 inches)73%very high
May Weather18°C (65°F)210 mm (8.3 inches)82%very high
June Weather25°C (77°F)100 mm (3.9 inches)82%extreme
July Weather26°C (80°F)72 mm (2.8 inches)81%extreme
August Weather24°C (76°F)124 mm (4.9 inches)78%very high
September Weather22°C (71°F)71 mm (2.8 inches)71%very high
October Weather13°C (55°F)123 mm (4.8 inches)71%high
November Weather6°C (43°F)37 mm (1.4 inches)81%moderate
December Weather2°C (36°F)29 mm (1.1 inches)84%moderate

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