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May Weather in Vandalia, United States

Last updated: June 24, 2025

In May, the average temperature in Vandalia, United States is a pleasant 19°C (67°F). However, temperatures can fluctuate widely, with minimums dropping to 4°C (39°F) and soaring up to 35°C (95°F). Be prepared for rain, as you can expect about 165 mm (6.5 in) of precipitation over 15 days. With an average humidity of 82%, this time of year can feel quite humid, adding to the overall experience of this vibrant destination.

May Temperature in Vandalia

In May in Vandalia, the average temperature is 19°C (67°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (39°F). This diverse temperature range makes Vandalia an ideal destination for travelers looking to enjoy both warm days and cool evenings.

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 19°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec313346546676797672574338
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 total precipitation amount is 165 mm (6.5 in) over a span of 15 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 165 mm (6.5 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec666212511616510995124621006045
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 82%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket wrapping around you, making each step feel sluggish and the air thick as you explore the sights.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
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)66 mm (2.6 inches)82%moderate
February Weather1°C (34°F)62 mm (2.4 inches)80%moderate
March Weather8°C (46°F)125 mm (4.9 inches)80%high
April Weather12°C (54°F)116 mm (4.5 inches)80%very high
May Weather19°C (67°F)165 mm (6.5 inches)82%very high
June Weather25°C (76°F)109 mm (4.3 inches)83%extreme
July Weather26°C (79°F)95 mm (3.7 inches)81%extreme
August Weather24°C (76°F)124 mm (4.9 inches)80%very high
September Weather22°C (72°F)62 mm (2.5 inches)76%very high
October Weather14°C (58°F)100 mm (3.9 inches)76%high
November Weather6°C (44°F)60 mm (2.4 inches)85%moderate
December Weather3°C (38°F)45 mm (1.8 inches)86%moderate

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