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April Weather in Princeton, United States

Last updated: June 24, 2025

In Princeton, United States, the average temperature in April hovers around 11°C (53°F), offering a refreshing climate. However, be prepared for temperature swings that can range from a chilly -5°C (23°F) to a warm 29°C (84°F). During this month, you'll encounter approximately 120 mm (4.7 in) of precipitation spread over 12 days, contributing to an average humidity of 84%. Pack accordingly to enjoy your visit!

April Temperature in Princeton

In April in Princeton, the average temperature is a mild 11°C (53°F). Maximum temperatures can reach up to 29°C (84°F), while minimums can drop as low as -5°C (23°F). Be prepared for a range of weather when traveling during this month, bringing both light clothing and warmer layers.

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 11°C (53°F), with highs reaching up to 29°C (84°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec344045536268727066574339
Data source: Temperature data for Princeton generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Princeton

In Princeton in April, the precipitation amount is 120 mm (4.7 in) 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 120 mm (4.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec77124100120133119781091091157296
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

April Humidity in Princeton

In Princeton in April, humidity is 84%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and requiring extra layers to stay warm while traveling.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111010753
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.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)77 mm (3.0 inches)87%moderate
February Weather4°C (40°F)124 mm (4.9 inches)87%high
March Weather7°C (45°F)100 mm (3.9 inches)86%very high
April Weather11°C (53°F)120 mm (4.7 inches)84%very high
May Weather17°C (62°F)133 mm (5.2 inches)83%extreme
June Weather20°C (68°F)119 mm (4.7 inches)83%extreme
July Weather22°C (72°F)78 mm (3.1 inches)79%extreme
August Weather21°C (70°F)109 mm (4.3 inches)66%very high
September Weather19°C (66°F)109 mm (4.3 inches)68%very high
October Weather14°C (57°F)115 mm (4.5 inches)78%high
November Weather6°C (43°F)72 mm (2.8 inches)89%moderate
December Weather4°C (39°F)96 mm (3.8 inches)86%moderate

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