October Weather in Princeton, United States

Last updated: June 24, 2025

In Princeton, United States, the average temperature in October hovers around 8°C (47°F). However, be prepared for a wide range, with minimums dropping to -11°C (12°F) and maximums reaching up to 28°C (83°F). Expect approximately 106 mm (4.2 in) of precipitation spread over 10 days, accompanied by a notable average humidity of 84%.

October Temperature in Princeton

In October in Princeton, the average temperature is 8°C (47°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop as low as -11°C (12°F). Be prepared for a wide range of temperatures if you plan to travel during this month!

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 8°C (47°F), with highs reaching up to 28°C (83°F) and lows dropping to around -11°C (12°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 106 mm (4.2 in) over a span of 10 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 106 mm (4.2 inches) of precipitation spread over approximately 10 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 84%. With an average temperature of 8°C (47°F), this humidity feels like a damp blanket wrapping around you, making travel feel heavy and a bit lethargic, as the air thickens with moisture and each step becomes a little more cumbersome.

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 84%, 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 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, 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 5, which falls under the moderate 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	-10°C (15°F)	19 mm (0.8 inches)	87%	low
February Weather	-9°C (16°F)	28 mm (1.1 inches)	90%	moderate
March Weather	0°C (32°F)	51 mm (2.0 inches)	85%	moderate
April Weather	6°C (42°F)	94 mm (3.7 inches)	84%	high
May Weather	15°C (58°F)	98 mm (3.9 inches)	78%	very high
June Weather	21°C (71°F)	75 mm (3.0 inches)	80%	very high
July Weather	23°C (74°F)	101 mm (4.0 inches)	81%	very high
August Weather	21°C (70°F)	142 mm (5.6 inches)	81%	very high
September Weather	17°C (63°F)	116 mm (4.6 inches)	81%	high
October Weather	8°C (47°F)	106 mm (4.2 inches)	84%	moderate
November Weather	0°C (32°F)	33 mm (1.3 inches)	88%	moderate
December Weather	-6°C (22°F)	48 mm (1.9 inches)	84%	low