October Weather in Princeton, United States

Last updated: June 24, 2025

In October, the average temperature in Princeton, United States hovers around a pleasant 19°C (67°F). Weather can vary significantly, with minimums dipping to 1°C (33°F) and highs soaring to 34°C (94°F). Expect around 157 mm (6.2 in) of precipitation spread across 9 days, and maintain your comfort with an average humidity of 72%.

October Temperature in Princeton

In October in Princeton, the average temperature is 19°C (67°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop as low as 1°C (33°F). Be prepared for a wide range of temperatures, making it essential to pack layers 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 19°C (67°F), with highs reaching up to 34°C (94°F) and lows dropping to around 1°C (33°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 157 mm (6.2 in) spread over 9 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 157 mm (6.2 inches) of precipitation spread over approximately 9 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 72%. With an average temperature of 19°C (67°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities a bit more challenging but also giving the air a refreshing quality that's invigorating for short excursions.

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 72%, 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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, 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	8°C (46°F)	65 mm (2.6 inches)	80%	moderate
February Weather	9°C (48°F)	104 mm (4.1 inches)	79%	high
March Weather	15°C (59°F)	134 mm (5.3 inches)	78%	very high
April Weather	18°C (64°F)	144 mm (5.7 inches)	78%	very high
May Weather	23°C (73°F)	180 mm (7.1 inches)	81%	extreme
June Weather	27°C (81°F)	100 mm (4.0 inches)	78%	extreme
July Weather	29°C (84°F)	58 mm (2.3 inches)	73%	extreme
August Weather	29°C (84°F)	96 mm (3.8 inches)	66%	extreme
September Weather	26°C (79°F)	98 mm (3.8 inches)	65%	very high
October Weather	19°C (67°F)	157 mm (6.2 inches)	72%	very high
November Weather	13°C (56°F)	58 mm (2.3 inches)	82%	high
December Weather	10°C (51°F)	73 mm (2.9 inches)	87%	moderate