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August Weather in Princeton, United States

Last updated: June 24, 2025

In August, the average temperature in Princeton, United States hovers around 25°C (78°F), creating a pleasant atmosphere for outdoor activities. Expect temperatures to range from a cool 13°C (57°F) at night to a warm 36°C (97°F) during the day. With an average precipitation of 87 mm (3.4 in) spread over 9 days, and a humidity level of 82%, be prepared for a mix of sun and refreshing showers. Enjoy the vibrant weather while exploring all that Princeton has to offer!

August Temperature in Princeton

In August in Princeton, the average temperature is 25°C (78°F). Maximum temperatures can reach 36°C (97°F) and minimums can be as low as 13°C (57°F). This climate makes Princeton an ideal destination for travelers seeking warm weather adventures.

August Weather in Princeton: Daily Temperature Highs, Lows, and Averages

The chart illustrates August 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, August typically has an average temperature of 25°C (78°F), with highs reaching up to 36°C (97°F) and lows dropping to around 13°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec353848566877807773614541
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.

August Precipitation in Princeton

In Princeton in August, the precipitation amount is 87 mm (3.4 in), occurring over a span of 9 days.

August Precipitation Trends in Princeton

The chart displays monthly precipitation patterns in Princeton, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Princeton, August typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9511914611813112473877711193102
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Princeton

In Princeton in August, humidity is 82%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities a bit more challenging and encouraging you to seek shade or a cool spot during your travels.

August Average Humidity in Princeton

This chart illustrates the average monthly humidity levels in Princeton, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Princeton is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Princeton

In Princeton in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Princeton.

Maximum UV Index Levels in Princeton for August

The chart shows the monthly maximum UV Index (UVI) for Princeton in August, 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 August, the maximum UV index in Princeton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3571010111099743
Data source: Princeton August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)95 mm (3.7 inches)84%moderate
February Weather3°C (38°F)119 mm (4.7 inches)82%moderate
March Weather9°C (48°F)146 mm (5.7 inches)84%high
April Weather14°C (57°F)118 mm (4.6 inches)83%very high
May Weather20°C (69°F)131 mm (5.2 inches)80%very high
June Weather25°C (77°F)124 mm (4.9 inches)83%extreme
July Weather27°C (80°F)73 mm (2.9 inches)82%very high
August Weather25°C (78°F)87 mm (3.4 inches)82%very high
September Weather23°C (73°F)77 mm (3.0 inches)79%very high
October Weather16°C (61°F)111 mm (4.4 inches)79%high
November Weather7°C (45°F)92 mm (3.6 inches)88%moderate
December Weather5°C (41°F)102 mm (4.0 inches)87%moderate

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