October Weather in Princeton, United States

Last updated: June 24, 2025

In Princeton, United States, the average temperature in October hovers around 12°C (54°F), with a temperature range that can dip to a chilly -4°C (26°F) and rise to a warm 31°C (88°F). Expect 154 mm (6.1 in) of precipitation over approximately 11 days, making humidity levels a notable 75%. Prepare for a dynamic month with a mix of cool and warm days!

October Temperature in Princeton

In October in Princeton, the average temperature is 12°C (54°F). The maximum can reach 31°C (88°F), while the minimum can be as low as -4°C (26°F). Be prepared for a wide range of temperatures, making it essential to pack both warm and lightweight clothing for your travels.

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 12°C (54°F), with highs reaching up to 31°C (88°F) and lows dropping to around -4°C (26°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 precipitation amount is 154 mm (6.1 in), falling over the course of 11 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 154 mm (6.1 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Princeton

In Princeton in October, humidity is 75%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that seeps into your bones, making it essential to layer your clothing for comfort while exploring.

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 75%, 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 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.

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 6, which falls under the 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	-4°C (26°F)	48 mm (1.9 inches)	78%	moderate
February Weather	-2°C (28°F)	44 mm (1.7 inches)	80%	moderate
March Weather	6°C (42°F)	103 mm (4.0 inches)	77%	high
April Weather	10°C (51°F)	78 mm (3.1 inches)	77%	very high
May Weather	18°C (64°F)	158 mm (6.2 inches)	77%	very high
June Weather	24°C (76°F)	124 mm (4.9 inches)	81%	extreme
July Weather	26°C (78°F)	106 mm (4.2 inches)	81%	extreme
August Weather	24°C (75°F)	88 mm (3.5 inches)	77%	very high
September Weather	21°C (70°F)	119 mm (4.7 inches)	73%	very high
October Weather	12°C (54°F)	154 mm (6.1 inches)	75%	high
November Weather	5°C (40°F)	55 mm (2.2 inches)	85%	moderate
December Weather	1°C (34°F)	34 mm (1.4 inches)	83%	moderate