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May Weather in Vandalia, United States

Last updated: June 24, 2025

In May, the average temperature in Vandalia, United States hovers around 18°C (64°F). However, be prepared for a temperature range where it can dip as low as -1°C (31°F) and climb up to a scorching 33°C (91°F). With 129 mm (5.1 in) of precipitation spread over 14 days, the atmosphere tends to be quite humid, averaging at 81%. Stay adaptable and enjoy the diverse weather!

May Temperature in Vandalia

In May in Vandalia, the average temperature is 18°C (64°F). The maximum can reach 33°C (91°F), while the minimum can be as low as -1°C (31°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates May temperature patterns in Vandalia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vandalia, May typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec303442526472767469574236
Data source: Temperature data for Vandalia 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 Vandalia

In Vandalia in May, the precipitation amount is 129 mm (5.1 in) over the course of 14 days.

May Precipitation Trends in Vandalia

The chart displays monthly precipitation patterns in Vandalia, 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 Vandalia, May typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7297106981291201009086999487
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Vandalia

In Vandalia in May, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

May Average Humidity in Vandalia

This chart illustrates the average monthly humidity levels in Vandalia, 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 Vandalia is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Vandalia

In Vandalia 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 Vandalia.

Maximum UV Index Levels in Vandalia for May

The chart shows the monthly maximum UV Index (UVI) for Vandalia 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 Vandalia typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
Data source: Vandalia 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 Vandalia Compares to Other Months

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

This table compares monthly weather conditions in Vandalia, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)72 mm (2.8 inches)88%moderate
February Weather1°C (34°F)97 mm (3.8 inches)88%moderate
March Weather6°C (42°F)106 mm (4.2 inches)87%high
April Weather11°C (52°F)98 mm (3.9 inches)85%very high
May Weather18°C (64°F)129 mm (5.1 inches)81%very high
June Weather22°C (72°F)120 mm (4.7 inches)82%very high
July Weather24°C (76°F)100 mm (3.9 inches)81%very high
August Weather23°C (74°F)90 mm (3.5 inches)73%very high
September Weather21°C (69°F)86 mm (3.4 inches)73%very high
October Weather14°C (58°F)99 mm (3.9 inches)78%high
November Weather5°C (42°F)94 mm (3.7 inches)89%moderate
December Weather2°C (36°F)87 mm (3.4 inches)87%moderate

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