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March Weather in Mount Vernon, United States

Last updated: June 24, 2025

In Mount Vernon, United States, the average temperature in March hovers around 9°C (48°F), but don’t be surprised if it swings from a chilling -15°C (6°F) to a surprisingly warm 26°C (79°F). Expect about 143 mm (5.6 in) of precipitation over 13 days, contributing to an average humidity of 84%. Embrace the variety this month has to offer!

March Temperature in Mount Vernon

In March in Mount Vernon, the average temperature is 9°C (48°F), with maximums reaching up to 26°C (79°F) and minimums dropping as low as -15°C (6°F). Be prepared for a range of weather conditions when traveling to Mount Vernon during this month.

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

The chart illustrates March 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, March typically has an average temperature of 9°C (48°F), with highs reaching up to 26°C (79°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec343748566877807773604540
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.

March Precipitation in Mount Vernon

In Mount Vernon in March, the precipitation amount is 143 mm (5.6 in) over a span of 13 days.

March Precipitation Trends in Mount Vernon

The chart displays monthly precipitation patterns in Mount Vernon, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Mount Vernon, March typically receives around 143 mm (5.6 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec931071431321651009486641219188
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Mount Vernon

In Mount Vernon in March, humidity is 84%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that envelops you, making it essential to dress in layers and stay active, as the moisture in the air can quickly lead to discomfort while traveling.

March Average Humidity in Mount Vernon

This chart illustrates the average monthly humidity levels in Mount Vernon, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Mount Vernon is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Mount Vernon

In Mount Vernon in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Mount Vernon.

Maximum UV Index Levels in Mount Vernon for March

The chart shows the monthly maximum UV Index (UVI) for Mount Vernon in March, 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 March, the maximum UV index in Mount Vernon typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579111110109753
Data source: Mount Vernon March 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 March 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 March’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 March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)93 mm (3.7 inches)84%moderate
February Weather3°C (38°F)107 mm (4.2 inches)82%moderate
March Weather9°C (48°F)143 mm (5.6 inches)84%high
April Weather14°C (57°F)131 mm (5.2 inches)83%very high
May Weather20°C (69°F)165 mm (6.5 inches)80%extreme
June Weather25°C (77°F)100 mm (3.9 inches)83%extreme
July Weather27°C (80°F)94 mm (3.7 inches)82%very high
August Weather25°C (77°F)86 mm (3.4 inches)82%very high
September Weather23°C (73°F)64 mm (2.5 inches)79%very high
October Weather16°C (61°F)121 mm (4.8 inches)79%high
November Weather7°C (45°F)91 mm (3.6 inches)88%moderate
December Weather5°C (41°F)88 mm (3.4 inches)87%moderate

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