April Weather in Princeton, United States

Last updated: June 24, 2025

In April, the average temperature in Princeton, United States hovers around 14°C (58°F), with a minimum dipping to -1°C (31°F) and a maximum soaring to 28°C (83°F). Expect 138 mm (5.4 in) of precipitation spread over 12 days, creating a humid atmosphere with an average humidity of 80%. Prepare for a mix of chilly and warm days, along with some rainy spells!

April Temperature in Princeton

In April in Princeton, the average temperature is 14°C (58°F). Maximums can reach 28°C (83°F), while minimums can drop as low as -1°C (31°F). Travelers should prepare for a wide range of temperatures and pack accordingly.

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

The chart illustrates April 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, April typically has an average temperature of 14°C (58°F), with highs reaching up to 28°C (83°F) and lows dropping to around -1°C (31°F).

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

April Precipitation in Princeton

In Princeton in April, the precipitation amount is 138 mm (5.4 in) spread over a period of 12 days.

April Precipitation Trends in Princeton

The chart displays monthly precipitation patterns in Princeton, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Princeton, April typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

April Humidity in Princeton

In Princeton in April humidity is 80%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities sweltering and uncomfortable for travel.

April Average Humidity in Princeton

This chart illustrates the average monthly humidity levels in Princeton, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Princeton is approximately 80%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Princeton

In Princeton in April, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Princeton.

Maximum UV Index Levels in Princeton for April

The chart shows the monthly maximum UV Index (UVI) for Princeton in April, 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 April, the maximum UV index in Princeton typically reaches 10, which falls under the very high exposure category.

Data source: Princeton April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	97 mm (3.8 inches)	86%	moderate
February Weather	5°C (42°F)	150 mm (5.9 inches)	84%	high
March Weather	10°C (51°F)	135 mm (5.3 inches)	84%	high
April Weather	14°C (58°F)	138 mm (5.4 inches)	80%	very high
May Weather	21°C (69°F)	118 mm (4.7 inches)	82%	extreme
June Weather	25°C (77°F)	118 mm (4.6 inches)	83%	extreme
July Weather	27°C (81°F)	106 mm (4.2 inches)	79%	very high
August Weather	26°C (78°F)	104 mm (4.1 inches)	76%	very high
September Weather	23°C (74°F)	93 mm (3.7 inches)	75%	very high
October Weather	17°C (63°F)	108 mm (4.3 inches)	74%	high
November Weather	9°C (48°F)	96 mm (3.8 inches)	85%	moderate
December Weather	6°C (44°F)	119 mm (4.7 inches)	88%	moderate