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May Weather in Mount Vernon, United States

Last updated: June 24, 2025

In May, the average temperature in Mount Vernon, United States is a warm 24°C (76°F), with the possibility of experiencing a minimum of 9°C (49°F) and a peak reaching as high as 38°C (101°F). During this month, expect an average precipitation of 84 mm (3.3 in) spread across 8 days, contributing to a relatively high average humidity of 81%.

May Temperature in Mount Vernon

In May in Mount Vernon, the average temperature is 24°C (76°F). Maximums can reach 38°C (101°F), and minimums can be as low as 9°C (49°F). This makes it an ideal time for travelers to enjoy a range of activities, from warm, sunny days to cooler evenings.

May Weather in Mount Vernon: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Mount Vernon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mount Vernon, May typically has an average temperature of 24°C (76°F), with highs reaching up to 38°C (101°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec515761677580838279725853
Data source: Temperature data for Mount Vernon 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 Mount Vernon

In Mount Vernon in May, the precipitation amount is 84 mm (3.3 in) spread over 8 days.

May Precipitation Trends in Mount Vernon

The chart displays monthly precipitation patterns in Mount Vernon, 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 Mount Vernon, May typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec83101748284108126119998456124
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mount Vernon

In Mount Vernon in May, humidity is 81%. With an average temperature of 24°C (76°F), this humidity feels like a warm, muggy embrace that can make outdoor activities feel exhausting, leaving travelers in need of frequent breaks and plenty of hydration.

May Average Humidity in Mount Vernon

This chart illustrates the average monthly humidity levels in Mount Vernon, 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 Mount Vernon is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%81%81%81%83%81%82%78%86%89%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mount Vernon

In Mount Vernon 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 Mount Vernon.

Maximum UV Index Levels in Mount Vernon for May

The chart shows the monthly maximum UV Index (UVI) for Mount Vernon 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 Mount Vernon typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479101111111110864
Data source: Mount Vernon 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 Mount Vernon Compares to Other Months

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

This table compares monthly weather conditions in Mount Vernon, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)83 mm (3.2 inches)86%moderate
February Weather14°C (57°F)101 mm (4.0 inches)84%high
March Weather16°C (62°F)74 mm (2.9 inches)83%very high
April Weather20°C (68°F)82 mm (3.2 inches)81%very high
May Weather24°C (76°F)84 mm (3.3 inches)81%extreme
June Weather27°C (80°F)108 mm (4.3 inches)81%extreme
July Weather28°C (83°F)126 mm (5.0 inches)83%extreme
August Weather28°C (82°F)119 mm (4.7 inches)81%extreme
September Weather26°C (80°F)99 mm (3.9 inches)82%very high
October Weather22°C (72°F)83 mm (3.3 inches)78%very high
November Weather14°C (58°F)56 mm (2.2 inches)86%high
December Weather12°C (54°F)124 mm (4.9 inches)89%moderate

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