March Weather in Princeton, United States

Last updated: June 24, 2025

In Princeton, United States, the average temperature in March hovers around 6°C (42°F). Expect to experience a minimum of -19°C (-1°F) and a maximum of 23°C (74°F). Prepare for a fair amount of rain, with 103 mm (4.0 in) of precipitation spread over 10 days. The air is typically quite humid, with an average humidity level of 77%.

March Temperature in Princeton

In March in Princeton, the average temperature is 6°C (42°F). The maximum can reach 23°C (74°F) and the minimum can be as low as -19°C (-1°F). Travelers should be prepared for a wide range of temperatures and pack accordingly to enjoy their visit.

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

The chart illustrates March temperature patterns in Princeton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Princeton, March typically has an average temperature of 6°C (42°F), with highs reaching up to 23°C (74°F) and lows dropping to around -19°C (-1°F).

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

March Precipitation in Princeton

In Princeton in March, the precipitation amount is 103 mm (4.0 in) over a span of 10 days.

March Precipitation Trends in Princeton

The chart displays monthly precipitation patterns in Princeton, 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 Princeton, March typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 10 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 Princeton

In Princeton in March, humidity is 77%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that seeps through your clothes, making outdoor activities less enjoyable and causing you to seek shelter more often.

March Average Humidity in Princeton

This chart illustrates the average monthly humidity levels in Princeton, 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 Princeton is approximately 77%, 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 Princeton

In Princeton 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 Princeton, you can refer to this Hourly UV Index in Princeton.

Maximum UV Index Levels in Princeton for March

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

Data source: Princeton 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 Princeton Compares to Other Months

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

This table compares monthly weather conditions in Princeton, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	48 mm (1.9 inches)	78%	moderate
February Weather	-2°C (28°F)	44 mm (1.7 inches)	80%	moderate
March Weather	6°C (42°F)	103 mm (4.0 inches)	77%	high
April Weather	10°C (51°F)	78 mm (3.1 inches)	77%	very high
May Weather	18°C (64°F)	158 mm (6.2 inches)	77%	very high
June Weather	24°C (76°F)	124 mm (4.9 inches)	81%	extreme
July Weather	26°C (78°F)	106 mm (4.2 inches)	81%	extreme
August Weather	24°C (75°F)	88 mm (3.5 inches)	77%	very high
September Weather	21°C (70°F)	119 mm (4.7 inches)	73%	very high
October Weather	12°C (54°F)	154 mm (6.1 inches)	75%	high
November Weather	5°C (40°F)	55 mm (2.2 inches)	85%	moderate
December Weather	1°C (34°F)	34 mm (1.4 inches)	83%	moderate