October Weather in Princeton, United States

Last updated: June 24, 2025

In October, the average temperature in Princeton, United States is a warm 27°C (81°F). Temperatures can swing from a cool 12°C (55°F) to a sweltering 33°C (91°F). During this month, expect 132 mm (5.2 in) of precipitation over 21 days and a notable average humidity of 79%, making for a rich and vibrant atmosphere.

October Temperature in Princeton

In October in Princeton, the average temperature is 27°C (81°F). Maximums can reach 33°C (91°F), while minimums can be as low as 12°C (55°F). This weather makes Princeton an ideal destination for travelers looking to enjoy warm days and cooler evenings.

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

The chart illustrates October 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, October typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (91°F) and lows dropping to around 12°C (55°F).

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

October Precipitation in Princeton

In Princeton in October, the total precipitation amount is 132 mm (5.2 in) spread over 21 days.

October Precipitation Trends in Princeton

The chart displays monthly precipitation patterns in Princeton, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Princeton, October typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 21 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Princeton

In Princeton in October, humidity is 79%. With an average temperature of 27°C (81°F), this humidity feels like a warm and sticky embrace, making travel both challenging and invigorating as the air clings to your skin, urging you to seek shade or a refreshing drink.

October Average Humidity in Princeton

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

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

October UV Index in Princeton

In Princeton in October, 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 October

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

Data source: Princeton October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	25 mm (1.0 inches)	81%	high
February Weather	23°C (73°F)	43 mm (1.7 inches)	79%	very high
March Weather	23°C (73°F)	27 mm (1.1 inches)	76%	very high
April Weather	25°C (78°F)	58 mm (2.3 inches)	73%	extreme
May Weather	26°C (80°F)	149 mm (5.9 inches)	71%	extreme
June Weather	28°C (82°F)	205 mm (8.1 inches)	69%	extreme
July Weather	28°C (84°F)	204 mm (8.0 inches)	70%	extreme
August Weather	29°C (84°F)	203 mm (8.0 inches)	72%	extreme
September Weather	28°C (83°F)	214 mm (8.4 inches)	76%	extreme
October Weather	27°C (81°F)	132 mm (5.2 inches)	79%	very high
November Weather	24°C (75°F)	69 mm (2.7 inches)	80%	very high
December Weather	22°C (71°F)	37 mm (1.4 inches)	81%	high