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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 13°C (55°F). Expect a range of weather, with minimum temperatures dipping to -4°C (26°F) and highs reaching up to 31°C (89°F). Rainfall is also a consideration, as the region sees about 132 mm (5.2 in) of precipitation over 12 days. Additionally, the average humidity stands at a notable 82%, creating a unique climate experience.

October Temperature in Princeton

In October in Princeton, the average temperature is 13°C (55°F). Maximum temperatures can reach 31°C (89°F), while minimums can drop to as low as -4°C (26°F). Be prepared for a wide range of weather conditions, from warm days to chilly nights, making it essential to pack accordingly 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 13°C (55°F), with highs reaching up to 31°C (89°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec252740506373767469553933
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 132 mm (5.2 in) over the course of 12 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 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec57649711416215910474941325450
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Princeton

In Princeton in October, humidity is 82%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities sticky and uncomfortable for traveling.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
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-4°C (25°F)57 mm (2.3 inches)82%moderate
February Weather-3°C (28°F)64 mm (2.5 inches)83%moderate
March Weather5°C (41°F)97 mm (3.8 inches)84%high
April Weather10°C (50°F)114 mm (4.5 inches)85%very high
May Weather17°C (63°F)162 mm (6.4 inches)79%very high
June Weather23°C (73°F)159 mm (6.2 inches)82%extreme
July Weather25°C (76°F)104 mm (4.1 inches)80%very high
August Weather23°C (74°F)74 mm (2.9 inches)81%very high
September Weather20°C (69°F)93 mm (3.7 inches)80%very high
October Weather13°C (55°F)132 mm (5.2 inches)82%high
November Weather4°C (39°F)54 mm (2.1 inches)88%moderate
December Weather1°C (33°F)50 mm (2.0 inches)84%low

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