March Weather in Plymouth, United States

Last updated: June 24, 2025

In March, the average temperature in Plymouth, United States hovers around -1°C (30°F). However, be prepared for a range, as temperatures can dip to a chilling -19°C (-2°F) or rise to a mild 19°C (66°F). Expect about 73 mm (2.9 in) of precipitation over 8 days, contributing to an average humidity of 82%.

March Temperature in Plymouth

In March, visiting Plymouth requires preparation for cold weather, as the average temperature hovers around -1°C (30°F). The temperature can soar to a maximum of 19°C (66°F), but be prepared for chilling lows that can drop to -19°C (-2°F).

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

The chart illustrates March temperature patterns in Plymouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plymouth, March typically has an average temperature of -1°C (30°F), with highs reaching up to 19°C (66°F) and lows dropping to around -19°C (-2°F).

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

March Precipitation in Plymouth

In Plymouth in March, the precipitation amount is 73 mm (2.9 in) over a span of 8 days.

March Precipitation Trends in Plymouth

The chart displays monthly precipitation patterns in Plymouth, 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 Plymouth, March typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 8 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 Plymouth

In Plymouth in March, humidity is 82%. With an average temperature of -1°C (30°F), this humidity feels like a sharp chill that penetrates your clothing, making travel uncomfortable and dampening your spirit as you navigate through the cold, moisture-laden air.

March Average Humidity in Plymouth

This chart illustrates the average monthly humidity levels in Plymouth, 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 Plymouth 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 Plymouth

In Plymouth 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 Plymouth.

Maximum UV Index Levels in Plymouth for March

The chart shows the monthly maximum UV Index (UVI) for Plymouth 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 Plymouth typically reaches 5, which falls under the moderate exposure category.

Data source: Plymouth 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 Plymouth Compares to Other Months

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

This table compares monthly weather conditions in Plymouth, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (21°F)	75 mm (3.0 inches)	86%	moderate
February Weather	-5°C (24°F)	83 mm (3.3 inches)	84%	moderate
March Weather	-1°C (30°F)	73 mm (2.9 inches)	82%	moderate
April Weather	6°C (43°F)	129 mm (5.1 inches)	80%	very high
May Weather	13°C (55°F)	86 mm (3.4 inches)	72%	very high
June Weather	18°C (65°F)	100 mm (3.9 inches)	72%	very high
July Weather	21°C (70°F)	137 mm (5.4 inches)	67%	very high
August Weather	20°C (69°F)	92 mm (3.6 inches)	66%	very high
September Weather	16°C (62°F)	66 mm (2.6 inches)	71%	high
October Weather	10°C (50°F)	134 mm (5.3 inches)	78%	moderate
November Weather	2°C (36°F)	115 mm (4.5 inches)	84%	moderate
December Weather	-3°C (26°F)	115 mm (4.5 inches)	81%	low