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March Weather in Mount Vernon, United States

Last updated: June 24, 2025

In March, the average temperature in Mount Vernon, United States hovers around 5°C (42°F). While you can expect a chilly minimum of -6°C (21°F), warm spells can bring highs of 22°C (72°F). Be prepared for 191 mm (7.5 in) of precipitation spread over 17 days, and don't forget your umbrella—humidity levels are typically a damp 88%!

March Temperature in Mount Vernon

In March in Mount Vernon, the average temperature is 5°C (42°F). Maximums can reach 22°C (72°F) and minimums can be as low as -6°C (21°F). Be prepared for a range of weather conditions if you plan to travel during this time.

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 5°C (42°F), with highs reaching up to 22°C (72°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec383641475459636459494338
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 total precipitation amount is 191 mm (7.5 in) spread over 17 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 191 mm (7.5 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec23624419114683753126146229313271
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 88%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less appealing and leading you to seek warmth indoors instead.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%88%86%82%82%85%77%76%88%88%89%
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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, 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 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987522
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 Weather3°C (38°F)236 mm (9.3 inches)87%low
February Weather2°C (36°F)244 mm (9.6 inches)86%moderate
March Weather5°C (42°F)191 mm (7.5 inches)88%moderate
April Weather8°C (47°F)146 mm (5.8 inches)86%high
May Weather12°C (54°F)82 mm (3.2 inches)82%very high
June Weather15°C (59°F)75 mm (3.0 inches)82%very high
July Weather17°C (63°F)31 mm (1.2 inches)85%very high
August Weather18°C (64°F)26 mm (1.0 inches)77%very high
September Weather15°C (59°F)146 mm (5.8 inches)76%high
October Weather9°C (49°F)229 mm (9.0 inches)88%moderate
November Weather6°C (43°F)312 mm (12.3 inches)88%low
December Weather3°C (38°F)271 mm (10.7 inches)89%low

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