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May Weather in Westerville, United States

Last updated: June 24, 2025

In May, the average temperature in Westerville, United States hovers around 17°C (63°F), but be prepared for a wide range—minimums can dip to -2°C (29°F), while maximums soar to 32°C (90°F). Expect 124 mm (4.9 in) of precipitation over approximately 15 days, contributing to a high average humidity of 81%.

May Temperature in Westerville

In May in Westerville, the average temperature is 17°C (63°F). The maximum can reach 32°C (90°F) and the minimum can be as low as -2°C (29°F). This varied climate makes it essential to pack both warm and cool attire for your travels.

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

The chart illustrates May temperature patterns in Westerville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Westerville, May typically has an average temperature of 17°C (63°F), with highs reaching up to 32°C (90°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec303342516371757368574136
Data source: Temperature data for Westerville 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 Westerville

In Westerville in May, the total precipitation amount is 124 mm (4.9 in) over a period of 15 days.

May Precipitation Trends in Westerville

The chart displays monthly precipitation patterns in Westerville, 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 Westerville, May typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec781041051161241441117486999697
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Westerville

In Westerville in May humidity is 81%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket enveloping you, making travel slightly oppressive and calling for frequent breaks in air-conditioned spaces to recharge and enjoy your journey comfortably.

May Average Humidity in Westerville

This chart illustrates the average monthly humidity levels in Westerville, 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 Westerville is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Westerville

In Westerville 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 Westerville.

Maximum UV Index Levels in Westerville for May

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

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

This table compares monthly weather conditions in Westerville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)78 mm (3.1 inches)88%moderate
February Weather1°C (34°F)104 mm (4.1 inches)87%moderate
March Weather5°C (42°F)105 mm (4.1 inches)87%high
April Weather11°C (52°F)116 mm (4.6 inches)87%very high
May Weather17°C (63°F)124 mm (4.9 inches)81%very high
June Weather22°C (72°F)144 mm (5.7 inches)82%very high
July Weather24°C (76°F)111 mm (4.4 inches)81%very high
August Weather23°C (73°F)74 mm (2.9 inches)78%very high
September Weather20°C (69°F)86 mm (3.4 inches)78%very high
October Weather14°C (58°F)99 mm (3.9 inches)82%high
November Weather5°C (42°F)96 mm (3.8 inches)89%moderate
December Weather2°C (36°F)97 mm (3.8 inches)86%moderate

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