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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 hovers around 16°C (62°F). Expect a wide range, with minimums dipping to 0°C (32°F) and maximums soaring to 34°C (94°F). Be prepared for 150 mm (5.9 in) of precipitation spread over about 15 days, accompanied by an average humidity of 78%.

May Temperature in Mount Vernon

In May in Mount Vernon, the average temperature is 16°C (62°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 0°C (32°F). This diverse temperature range makes Mount Vernon an ideal destination for travelers seeking both warm days and cool 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 16°C (62°F), with highs reaching up to 34°C (94°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec212338486173767267523730
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 total precipitation amount is 150 mm (5.9 in) over a span of 15 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 150 mm (5.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec4758738115012581831301364845
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 78%. With an average temperature of 16°C (62°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities enjoyable yet slightly sticky. Travelers may find the weather pleasantly mild, though they'll appreciate having light, breathable clothing on hand to stay comfortable while exploring.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
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 is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098633
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 Weather-6°C (21°F)47 mm (1.9 inches)81%moderate
February Weather-5°C (23°F)58 mm (2.3 inches)81%moderate
March Weather3°C (38°F)73 mm (2.9 inches)81%high
April Weather9°C (48°F)81 mm (3.2 inches)82%very high
May Weather16°C (62°F)150 mm (5.9 inches)78%very high
June Weather23°C (73°F)125 mm (4.9 inches)81%extreme
July Weather24°C (76°F)81 mm (3.2 inches)79%very high
August Weather22°C (73°F)83 mm (3.3 inches)77%very high
September Weather19°C (67°F)130 mm (5.1 inches)78%very high
October Weather11°C (53°F)136 mm (5.4 inches)78%high
November Weather3°C (38°F)48 mm (1.9 inches)87%moderate
December Weather-1°C (30°F)45 mm (1.8 inches)84%moderate

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