March Weather in Plymouth, United States

Last updated: June 24, 2025

In March, the average temperature in Plymouth, United States hovers around 4°C (40°F), with occasional extremes ranging from a brisk -15°C (5°F) to a surprisingly warm 25°C (78°F). Visitors can expect about 102 mm (4.0 in) of precipitation spread across roughly 12 days, complemented by a high average humidity of 86%. Pack accordingly for a cozy yet dynamic climate!

March Temperature in Plymouth

In March in Plymouth, the average temperature is 4°C (40°F). Maximums can reach 25°C (78°F) and minimums can be as low as -15°C (5°F). It is advisable to pack layers for your travels, as you may experience both chilly and warm conditions.

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 4°C (40°F), with highs reaching up to 25°C (78°F) and lows dropping to around -15°C (5°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 total precipitation amount is 102 mm (4.0 in), occurring over a span of 12 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 102 mm (4.0 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Plymouth

In Plymouth in March humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

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 86%, 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 is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Plymouth, you can refer to this 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 6, which falls under the high 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	-2°C (28°F)	73 mm (2.9 inches)	85%	moderate
February Weather	-1°C (30°F)	76 mm (3.0 inches)	85%	moderate
March Weather	4°C (40°F)	102 mm (4.0 inches)	86%	high
April Weather	10°C (50°F)	103 mm (4.0 inches)	87%	very high
May Weather	17°C (62°F)	151 mm (6.0 inches)	81%	very high
June Weather	22°C (73°F)	116 mm (4.5 inches)	82%	very high
July Weather	24°C (76°F)	116 mm (4.6 inches)	81%	very high
August Weather	23°C (73°F)	101 mm (4.0 inches)	79%	very high
September Weather	20°C (68°F)	73 mm (2.9 inches)	78%	very high
October Weather	13°C (56°F)	118 mm (4.6 inches)	81%	high
November Weather	5°C (41°F)	78 mm (3.1 inches)	89%	moderate
December Weather	1°C (34°F)	61 mm (2.4 inches)	86%	low