October weather forecast
Princeton, NJ

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An ancient stone building still stands strong in the neat fields and scenic trees of Princeton University, New Jersey
An ancient stone building still stands strong in the neat fields and scenic trees of Princeton University, New Jersey

Weather in October

October in Princeton is utterly autumnal, with temperatures making a noticeable dip from September's mild warmth. The shortening daylight hours and the crimson Autumn leaves paint a picturesque backdrop. With the retreat of summer, the wind speed picks up, contributing to the overall feel of the season. The month also sees a marginal increase in rainfall than the preceding month, nurturing the fall foliage. When juxtaposed to September, October reveals lower temperatures, less sunshine, and gustier winds.

Temperature

Princeton's October weather shows a moderate shift in high-temperatures, falling from September's warm 75.7°F (24.3°C) to a refreshing 63.9°F (17.7°C). In the month of October, Princeton's average low-temperature falls to a chilly 49.1°F (9.5°C).

Humidity

The most humid month in Princeton is October, with an average relative humidity of 79%.

Rainfall

In Princeton, in October, during 9.3 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 119.3 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

Snowfall

In Princeton, snow does not fall in June through October.

Daylight

In October, the average length of the day in Princeton, New Jersey, is 11h and 7min.
On the first day of October, sunrise is at 6:55 am and sunset at 6:40 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:56 pm EDT.

Sunshine

In October, the average sunshine is 5.7h.

UV index

In Princeton, the average daily maximum UV index in October is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index, 3 during October, leads to the following recommendations:
Act with care - The need to guard against sun damage is communicated. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
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Frequently asked questions

What is the temperature in October in Princeton?

The average high-temperature and low-temperature during October are 63.9°F (17.7°C) and 49.1°F (9.5°C) respectively. In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 89.6°F (32°C).

What is the most humid month in Princeton?

With an average relative humidity of 79%, October is the most humid month.

What is the average humidity in October in Princeton?

In Princeton, the average relative humidity in October is 79%.

How many days does it rain in October in Princeton?

In Princeton, during October, the rain falls for 9.3 days and regularly aggregates up to 1.02" (26mm) of precipitation.

When it does not snow in Princeton?

In Princeton, snow does not fall in June through October.

Does it snow in Princeton in October?

In Princeton, New Jersey, in October, it doesn't snow. In November, it regularly snows.

What is the average length of the day in October in Princeton?

In October, the average day length in Princeton, New Jersey, is 11h and 7min.

When is the sunrise / sunset in October in Princeton?

On the first day of October in Princeton, sunrise is at 6:55 am and sunset at 6:40 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:56 pm EDT.

How many hours of sunshine does Princeton have in October?

In Princeton, New Jersey, the average sunshine duration in October is 5.7h.

What is the UV index intensity in October in Princeton?

In October, the average daily maximum UV index in Princeton, New Jersey, is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Princeton, NJ

Average temperature in October - Princeton, NJ
  • Average high temperature in October: 63.9°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in October: 49.1°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

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Average pressure in October
Princeton, NJ

Average pressure in October - Princeton, NJ
  • Average pressure in October: 30.02"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in October
Princeton, NJ

Average wind speed in October - Princeton, NJ
  • Average wind speed in October: 7.1mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in October
Princeton, NJ

Average humidity in October - Princeton, NJ
  • Average humidity in October: 79%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in October
Princeton, NJ

Average rainfall in October - Princeton, NJ
  • Average rainfall in October: 1.02"

The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is September (0.67").

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Average rainfall days in October
Princeton, NJ

Average rainfall days in October - Princeton, NJ
  • Average rainfall days in October: 9.3 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

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Average snowfall in October
Princeton, NJ

Average snowfall in October - Princeton, NJ
  • Average snowfall in October: 0"

The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in October
Princeton, NJ

Average snowfall days in October - Princeton, NJ
  • Average snowfall days in October: 0 days

The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in October /
Average sunshine in October
Princeton, NJ

Average daylight in October / Average sunshine in October - Princeton, NJ
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in October: 5h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in October
Princeton, NJ

Average sunshine days in October - Princeton, NJ
  • Average sunshine days in October: 19.2 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in October
Princeton, NJ

Average UV index in October - Princeton, NJ
  • Average UV index in October: 3

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in October
Princeton, NJ

Average cloud cover in October - Princeton, NJ
  • Average cloud cover in October: 41

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in October
Princeton, NJ

Average visibility in October - Princeton, NJ
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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Princeton, New Jersey, USA

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