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October Weather in Princeton, United States

Last updated: June 24, 2025

In October, the average temperature in Princeton, United States hovers around 10°C (51°F). Expect a broad range with a minimum of -4°C (24°F) and a maximum reaching up to 29°C (85°F). Be prepared for approximately 105 mm (4.1 in) of precipitation over 13 days, contributing to an average humidity of 83%.

October Temperature in Princeton

In October in Princeton, the average temperature is 10°C (51°F). Maximums can reach 29°C (85°F), while minimums can drop as low as -4°C (24°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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 10°C (51°F), with highs reaching up to 29°C (85°F) and lows dropping to around -4°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec202134445869747064503628
Data source: Temperature data for Princeton generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Princeton

In Princeton in October, the precipitation amount is 105 mm (4.1 in) over the course of 13 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 105 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec46506099117108109100891054648
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Princeton

In Princeton in October, humidity is 83%. With an average temperature of 10°C (51°F), this humidity feels like a chilly dampness that permeates your clothes, making it essential to dress in layers for travel, as the cool air combined with the high humidity can create an uncomfortable and bone-chilling atmosphere.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
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.
JanFebMarAprMayJunJulAugSepOctNovDec34589101097532
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.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (20°F)46 mm (1.8 inches)85%moderate
February Weather-6°C (21°F)50 mm (2.0 inches)85%moderate
March Weather1°C (34°F)60 mm (2.4 inches)85%moderate
April Weather7°C (45°F)99 mm (3.9 inches)85%very high
May Weather15°C (59°F)117 mm (4.6 inches)78%very high
June Weather21°C (70°F)108 mm (4.3 inches)80%very high
July Weather23°C (74°F)109 mm (4.3 inches)78%very high
August Weather21°C (71°F)100 mm (3.9 inches)76%very high
September Weather18°C (64°F)89 mm (3.5 inches)79%high
October Weather10°C (51°F)105 mm (4.1 inches)83%moderate
November Weather2°C (36°F)46 mm (1.8 inches)88%moderate
December Weather-2°C (28°F)48 mm (1.9 inches)81%low

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