nomadseason

May Weather in Appalachia, United States

Last updated: June 24, 2025

In Appalachia, United States, the average temperature in May hovers around 18°C (64°F). You can expect a range from a chilly -1°C (31°F) to a warm 29°C (85°F). With 146 mm (5.8 in) of precipitation spread over 16 days, it's wise to keep an umbrella handy! Additionally, prepare for high humidity levels at 84%, making the air feel rather muggy.

May Temperature in Appalachia

In May in Appalachia, the average temperature is 18°C (64°F). The maximum can reach 29°C (85°F), and the minimum can be as low as -1°C (31°F). Be prepared for a wide range of temperatures when traveling to Appalachia during this time.

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

The chart illustrates May temperature patterns in Appalachia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Appalachia, May typically has an average temperature of 18°C (64°F), with highs reaching up to 29°C (85°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec364146546469737168584440
Data source: Temperature data for Appalachia 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 Appalachia

In Appalachia in May, the precipitation amount is 146 mm (5.8 in) during 16 days, indicating a relatively wet period for the region.

May Precipitation Trends in Appalachia

The chart displays monthly precipitation patterns in Appalachia, 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 Appalachia, May typically receives around 146 mm (5.8 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec9518013516014614713114712113978127
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Appalachia

In Appalachia in May humidity is 84%. With an average temperature of 18°C (64°F), this humidity feels like there's a heavy blanket wrapping around you, making travel feel a bit sticky and muggy, potentially leading to fatigue if you're not prepared.

May Average Humidity in Appalachia

This chart illustrates the average monthly humidity levels in Appalachia, 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 Appalachia is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Appalachia

In Appalachia 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 Appalachia.

Maximum UV Index Levels in Appalachia for May

The chart shows the monthly maximum UV Index (UVI) for Appalachia 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 Appalachia typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3689111111109753
Data source: Appalachia 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 Appalachia Compares to Other Months

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

This table compares monthly weather conditions in Appalachia, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)95 mm (3.7 inches)88%moderate
February Weather5°C (41°F)180 mm (7.1 inches)88%high
March Weather8°C (47°F)135 mm (5.3 inches)87%very high
April Weather12°C (54°F)160 mm (6.3 inches)84%very high
May Weather18°C (64°F)146 mm (5.8 inches)84%extreme
June Weather21°C (69°F)147 mm (5.8 inches)83%extreme
July Weather23°C (73°F)130 mm (5.1 inches)79%extreme
August Weather22°C (72°F)147 mm (5.8 inches)66%very high
September Weather20°C (68°F)121 mm (4.8 inches)67%very high
October Weather15°C (58°F)139 mm (5.5 inches)76%high
November Weather7°C (44°F)78 mm (3.1 inches)89%moderate
December Weather4°C (40°F)127 mm (5.0 inches)88%moderate

Compare Appalachia's Climate with Cities Worldwide