July Weather in Princeton, United States

Last updated: June 24, 2025

In July, the average temperature in Princeton, United States is a pleasant 22°C (72°F), with minimums dipping to 11°C (52°F) and maximums soaring up to 32°C (90°F). This month also sees 78 mm (3.1 in) of precipitation spread across 12 days, while the average humidity remains relatively high at 79%. Enjoy the warmth with the occasional refreshing rain!

July Temperature in Princeton

In July in Princeton, the average temperature is 22°C (72°F), with maximums potentially reaching 32°C (90°F) and minimums dropping to as low as 11°C (52°F). This pleasant climate makes Princeton an ideal destination for travelers looking to enjoy mild temperatures and explore the local attractions.

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

The chart illustrates July 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, July typically has an average temperature of 22°C (72°F), with highs reaching up to 32°C (90°F) and lows dropping to around 11°C (52°F).

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

July Precipitation in Princeton

In Princeton in July, the precipitation amount is 78 mm (3.1 in), occurring over a span of 12 days.

July Precipitation Trends in Princeton

The chart displays monthly precipitation patterns in Princeton, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Princeton, July typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 12 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Princeton

In Princeton in July humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.

July Average Humidity in Princeton

This chart illustrates the average monthly humidity levels in Princeton, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Princeton is approximately 79%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Princeton

In Princeton in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Princeton.

Maximum UV Index Levels in Princeton for July

The chart shows the monthly maximum UV Index (UVI) for Princeton in July, 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 July, the maximum UV index in Princeton typically reaches 11, which falls under the extreme exposure category.

Data source: Princeton July 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 July 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 July’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 July’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