March Weather in Sudbury, United States

Last updated: June 24, 2025

In March, the average temperature in Sudbury, United States hovers around 3°C (38°F). Expect a chilling minimum of -18°C (-1°F) and an occasional warm maximum of 22°C (73°F). Visitors should prepare for approximately 86 mm (3.4 in) of precipitation spread over 9 days, with an average humidity of 82% creating a particularly damp atmosphere.

March Temperature in Sudbury

In March in Sudbury the average temperature is 3°C (38°F). Maximums can reach 22°C (73°F) and minimums can be as low as -18°C (-1°F). This wide range of temperatures makes it essential for travelers to pack layers to stay comfortable throughout their visit.

March Weather in Sudbury: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Sudbury, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sudbury, March typically has an average temperature of 3°C (38°F), with highs reaching up to 22°C (73°F) and lows dropping to around -18°C (-1°F).

Data source: Temperature data for Sudbury generated using information from the Copernicus Climate Change Service.

March Precipitation in Sudbury

In Sudbury in March, the precipitation amount is 86 mm (3.4 in), falling over the course of 9 days.

March Precipitation Trends in Sudbury

The chart displays monthly precipitation patterns in Sudbury, 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 Sudbury, March typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Sudbury

In Sudbury in March humidity is 82%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making outdoor adventures quite uncomfortable and requiring extra layers to stay warm while exploring.

March Average Humidity in Sudbury

This chart illustrates the average monthly humidity levels in Sudbury, 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 Sudbury is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Sudbury

In Sudbury in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Sudbury, you can refer to this Hourly UV Index in Sudbury.

Maximum UV Index Levels in Sudbury for March

The chart shows the monthly maximum UV Index (UVI) for Sudbury 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 Sudbury typically reaches 6, which falls under the high exposure category.

Data source: Sudbury 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 Sudbury Compares to Other Months

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

This table compares monthly weather conditions in Sudbury, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	69 mm (2.7 inches)	86%	moderate
February Weather	0°C (32°F)	85 mm (3.3 inches)	84%	moderate
March Weather	3°C (38°F)	86 mm (3.4 inches)	82%	high
April Weather	9°C (48°F)	124 mm (4.9 inches)	80%	very high
May Weather	15°C (59°F)	86 mm (3.4 inches)	72%	very high
June Weather	20°C (69°F)	85 mm (3.4 inches)	72%	very high
July Weather	23°C (74°F)	133 mm (5.3 inches)	67%	very high
August Weather	23°C (73°F)	85 mm (3.4 inches)	66%	very high
September Weather	19°C (66°F)	79 mm (3.1 inches)	71%	high
October Weather	13°C (55°F)	132 mm (5.2 inches)	78%	high
November Weather	5°C (42°F)	97 mm (3.8 inches)	84%	moderate
December Weather	0°C (33°F)	118 mm (4.6 inches)	81%	low