nomadseason

May Weather in Sistersville, United States

Last updated: June 24, 2025

In May, the average temperature in Sistersville, United States hovers around 18°C (64°F). However, temperatures can fluctuate, with a minimum of -1°C (31°F) and a maximum soaring to 31°C (89°F). Be prepared for some rain, as the area experiences approximately 141 mm (5.6 in) of precipitation over 17 days. With an average humidity of 82%, the air can feel quite moist and tropical.

May Temperature in Sistersville

In May in Sistersville, the average temperature is 18°C (64°F). Maximum temperatures can reach 31°C (89°F), while minimums can drop as low as -1°C (31°F). Travelers should be prepared for a wide range of temperatures, making layered clothing a smart choice.

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

The chart illustrates May temperature patterns in Sistersville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sistersville, May typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (89°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec333844546471757369594438
Data source: Temperature data for Sistersville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Sistersville

In Sistersville, in May, the precipitation amount is 141 mm (5.6 in) over the course of 17 days.

May Precipitation Trends in Sistersville

The chart displays monthly precipitation patterns in Sistersville, 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 Sistersville, May typically receives around 141 mm (5.6 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec9312811514814117012710010511486118
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Sistersville

In Sistersville in May humidity is 82%. With an average temperature of 18°C (64°F), this humidity feels like a warm, muggy embrace that can make exploring the area feel stifling, leaving travelers drenched in sweat and longing for respite in the shade.

May Average Humidity in Sistersville

This chart illustrates the average monthly humidity levels in Sistersville, 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 Sistersville is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Sistersville

In Sistersville 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 Sistersville.

Maximum UV Index Levels in Sistersville for May

The chart shows the monthly maximum UV Index (UVI) for Sistersville 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 Sistersville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Sistersville 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 Sistersville Compares to Other Months

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

This table compares monthly weather conditions in Sistersville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)93 mm (3.7 inches)88%moderate
February Weather3°C (38°F)128 mm (5.0 inches)88%moderate
March Weather7°C (45°F)115 mm (4.5 inches)88%high
April Weather12°C (54°F)148 mm (5.8 inches)86%very high
May Weather18°C (64°F)141 mm (5.6 inches)82%very high
June Weather22°C (71°F)170 mm (6.7 inches)84%very high
July Weather24°C (76°F)126 mm (5.0 inches)82%very high
August Weather23°C (74°F)100 mm (3.9 inches)73%very high
September Weather21°C (69°F)105 mm (4.1 inches)73%very high
October Weather15°C (59°F)114 mm (4.5 inches)81%high
November Weather7°C (44°F)86 mm (3.4 inches)89%moderate
December Weather4°C (39°F)118 mm (4.7 inches)86%moderate

Compare Sistersville's Climate with Cities Worldwide