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March Weather in St. Mary's, United States

Last updated: June 24, 2025

In March, the average temperature in St. Mary's, United States hovers around -8°C (17°F). Expect ranges between a brisk -28°C (-18°F) and a milder 5°C (42°F). The region sees 54 mm (2.1 in) of precipitation spread over about 10 days, accompanied by an average humidity of 85%. Bundle up and be prepared for cozy, chilly days!

March Temperature in St. Mary's

In March in St. Mary's, the average temperature is -8°C (17°F). Maximums can reach 5°C (42°F), and minimums can be as low as -28°C (-18°F). Be sure to bundle up and prepare for cold conditions while exploring St. Mary's during this time.

March Weather in St. Mary's: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in St. Mary's, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Mary's, March typically has an average temperature of -8°C (17°F), with highs reaching up to 5°C (42°F) and lows dropping to around -28°C (-18°F).
JanFebMarAprMayJunJulAugSepOctNovDec71217304555565446362013
Data source: Temperature data for St. Mary's 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 St. Mary's

In St. Mary's in March, the total precipitation amount is 54 mm (2.1 in) over the course of 10 days.

March Precipitation Trends in St. Mary's

The chart displays monthly precipitation patterns in St. Mary's, 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 St. Mary's, March typically receives around 54 mm (2.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec316554476455638691785559
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in St. Mary's

In St. Mary's in March humidity is 85%. With an average temperature of -8°C (17°F), this humidity feels like a biting chill that seeps into your bones, making outdoor travel uncomfortable and requiring extra layers to stay warm and dry.

March Average Humidity in St. Mary's

This chart illustrates the average monthly humidity levels in St. Mary's, 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 St. Mary's is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%96%85%78%80%86%89%91%92%90%93%98%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in St. Mary's

In St. Mary's in March, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in St. Mary's, you can check the information here.

Maximum UV Index Levels in St. Mary's for March

The chart shows the monthly maximum UV Index (UVI) for St. Mary's 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 St. Mary's typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113456653211
Data source: St. Mary's 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 St. Mary's Compares to Other Months

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

This table compares monthly weather conditions in St. Mary's, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-14°C (7°F)30 mm (1.2 inches)98%low
February Weather-11°C (12°F)65 mm (2.6 inches)96%low
March Weather-8°C (17°F)54 mm (2.1 inches)85%moderate
April Weather-1°C (30°F)47 mm (1.8 inches)78%moderate
May Weather7°C (45°F)63 mm (2.5 inches)80%moderate
June Weather13°C (55°F)55 mm (2.2 inches)86%high
July Weather14°C (57°F)63 mm (2.5 inches)89%high
August Weather12°C (54°F)86 mm (3.4 inches)91%moderate
September Weather8°C (47°F)91 mm (3.6 inches)92%moderate
October Weather2°C (36°F)78 mm (3.1 inches)90%low
November Weather-7°C (20°F)55 mm (2.2 inches)93%low
December Weather-11°C (13°F)59 mm (2.3 inches)98%low

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