Last updated: June 24, 2025
In March, the average temperature in Princeton, United States hovers around 4°C (40°F). Expect a chill, with minimums plunging to -21°C (-5°F) and maximums peaking at 24°C (76°F). This month brings 88 mm (3.5 in) of precipitation over approximately 9 days, contributing to an average humidity of 81%. Stay warm and dry!
In March in Princeton, the average temperature is 4°C (40°F), with maximums reaching 24°C (76°F) and minimums dropping as low as -21°C (-5°F). Be prepared for a wide range of weather conditions while traveling, as you may experience both mild days and frigid nights.
In Princeton in March, the precipitation amount is 88 mm (3.5 in) over the course of 9 days.
In Princeton in March humidity is 81%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that can make traveling quite uncomfortable, as the cold air clings uncomfortably to your skin and the moisture can quickly sap your body heat.
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.
UV Risk Categories
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.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | -5°C (23°F) | 55 mm (2.2 inches) | 81% | moderate |
February Weather | -4°C (26°F) | 60 mm (2.4 inches) | 81% | moderate |
March Weather | 4°C (40°F) | 88 mm (3.5 inches) | 81% | high |
April Weather | 9°C (49°F) | 106 mm (4.2 inches) | 82% | very high |
May Weather | 17°C (62°F) | 148 mm (5.8 inches) | 78% | very high |
June Weather | 23°C (73°F) | 134 mm (5.3 inches) | 81% | extreme |
July Weather | 25°C (77°F) | 85 mm (3.4 inches) | 79% | very high |
August Weather | 23°C (74°F) | 81 mm (3.2 inches) | 77% | very high |
September Weather | 20°C (68°F) | 117 mm (4.6 inches) | 78% | very high |
October Weather | 12°C (54°F) | 112 mm (4.4 inches) | 78% | high |
November Weather | 4°C (39°F) | 48 mm (1.9 inches) | 87% | moderate |
December Weather | 0°C (32°F) | 48 mm (1.9 inches) | 84% | low |