March Weather in Princeton, United States

Last updated: June 24, 2025

In March, the average temperature in Princeton, United States hovers around 7°C (45°F). While you might experience a brisk chill, with minimums dipping to -13°C (9°F), the mercury can soar to a pleasant 29°C (84°F) on warmer days. Be prepared for some rain, as precipitation totals about 100 mm (3.9 in) over 13 days. With average humidity at a high 86%, it's wise to dress accordingly for the weather!

March Temperature in Princeton

In March in Princeton, the average temperature is 7°C (45°F), with maximums reaching up to 29°C (84°F) and minimums plummeting as low as -13°C (9°F). Be sure to pack layers for your trip, as this range indicates a mix of mild and potentially chilly weather.

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 7°C (45°F), with highs reaching up to 29°C (84°F) and lows dropping to around -13°C (9°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 total precipitation amount is 100 mm (3.9 in), occurring over a span of 13 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 100 mm (3.9 inches) of precipitation spread over approximately 13 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 86%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and necessitating cozy layers to stay warm while navigating the moist air.

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 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 Princeton

In Princeton in March, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the 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 8, which falls under the very 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	1°C (34°F)	77 mm (3.0 inches)	87%	moderate
February Weather	4°C (40°F)	124 mm (4.9 inches)	87%	high
March Weather	7°C (45°F)	100 mm (3.9 inches)	86%	very high
April Weather	11°C (53°F)	120 mm (4.7 inches)	84%	very high
May Weather	17°C (62°F)	133 mm (5.2 inches)	83%	extreme
June Weather	20°C (68°F)	119 mm (4.7 inches)	83%	extreme
July Weather	22°C (72°F)	78 mm (3.1 inches)	79%	extreme
August Weather	21°C (70°F)	109 mm (4.3 inches)	66%	very high
September Weather	19°C (66°F)	109 mm (4.3 inches)	68%	very high
October Weather	14°C (57°F)	115 mm (4.5 inches)	78%	high
November Weather	6°C (43°F)	72 mm (2.8 inches)	89%	moderate
December Weather	4°C (39°F)	96 mm (3.8 inches)	86%	moderate