Monthly weather forecast and climate
Princeton, NJ

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 January

January, like December, in Princeton, New Jersey, is a wintry winter month, with average temperature fluctuating between 36.9°F (2.7°C) and 24.3°F (-4.3°C). The coldest month is January, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.3°F (-4.3°C). Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Princeton, New Jersey, with temperature in the range of an average high of 39.9°F (4.4°C) and an average low of 26.1°F (-3.3°C). In Princeton, New Jersey, the average high-temperature in February is essentially the same as in January - a still wintry 39.9°F (4.4°C). Weather in February »

Weather in March

March, the first month of the spring, in Princeton, is a frosty month, with average temperature ranging between max 48.6°F (9.2°C) and min 33.3°F (0.7°C). In March, the average high-temperature marginally rises, from a wintry 39.9°F (4.4°C) in February, to a chilly 48.6°F (9.2°C). Weather in March »

Weather in April

April in Princeton, New Jersey, is a mild spring month, with temperature in the range of an average low of 43.3°F (6.3°C) and an average high of 60.4°F (15.8°C). In Princeton, the average high-temperature rises, from a frosty 48.6°F (9.2°C) in March, to a moderate 60.4°F (15.8°C). Weather in April »

Weather in May

The last month of the spring, May, is an agreeable month in Princeton, New Jersey, with temperature in the range of an average low of 53.2°F (11.8°C) and an average high of 70.5°F (21.4°C). In Princeton, the average high-temperature rises, from a mild 60.4°F (15.8°C) in April, to an agreeable 70.5°F (21.4°C). Weather in May »

Weather in June

June, the first month of the summer, in Princeton, is a warm month, with average temperature varying between 78.4°F (25.8°C) and 61°F (16.1°C). In June, the average high-temperature marginally rises, from a pleasant 70.5°F (21.4°C) in May, to a warm 78.4°F (25.8°C). Weather in June »

Weather in July

July, like June, in Princeton, New Jersey, is another warm summer month, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 84.7°F (29.3°C). The warmest month is July, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 66.9°F (19.4°C). In July, the average heat index is estimated at a tropical 93.9°F (34.4°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Princeton, New Jersey, with average temperature varying between 82.9°F (28.3°C) and 65.8°F (18.8°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 82.9°F (28.3°C). Weather in August »

Weather in September

September, the first month of the autumn, in Princeton, is still a warm month, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 59°F (15°C). In Princeton, the average high-temperature slightly decreases, from 82.9°F (28.3°C) in August, to a still warm 75.7°F (24.3°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Princeton, New Jersey, with average temperature varying between 49.1°F (9.5°C) and 63.9°F (17.7°C). In October, the average high-temperature drops, from a warm 75.7°F (24.3°C) in September, to a comfortable 63.9°F (17.7°C). Weather in October »

Weather in November

November, the last month of the autumn, in Princeton, is another cool month, with average temperature ranging between min 37.8°F (3.2°C) and max 51.8°F (11°C). In Princeton, the average high-temperature drops, from a comfortable 63.9°F (17.7°C) in October, to a fresh 51.8°F (11°C). Weather in November »

Weather in December

The first month of the winter, December, is still a chilly month in Princeton, New Jersey, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 43°F (6.1°C). In December, the average high-temperature slightly decreases, from a cool 51.8°F (11°C) in November, to a chilly 43°F (6.1°C). Weather in December »
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FAQ

What is the coldest month in Princeton?

With an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.3°F (-4.3°C), January is the coldest month in Princeton, New Jersey.

How much does it rain in Princeton?

Throughout the year, in Princeton, there are 119.3 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

When does it snow in Princeton?

Months with snowfall in Princeton are January through May, November and December.

How much does it snow in Princeton?

In Princeton, during the entire year, snow falls for 16.4 days, and aggregates up to 4.41" (112mm) of snow.

What are the months with the lowest UV index in Princeton?

Months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the month with the least sunshine in Princeton?

With an average of 4.8h of sunshine, February has the least sunshine of the year in Princeton.

When does it snow the most in Princeton?

March is the month with the most snowfall. Snow falls for 3.7 days and accumulates 1.42" (36mm) of snow.

What is the least humid month in Princeton?

With an average relative humidity of 73%, April is the least humid month in Princeton.

When it does not snow in Princeton?

June through October are months without snowfall.

When are the longest days in Princeton?

June has the longest days of the year in Princeton, New Jersey, with an average of 15h of daylight.

When is the highest UV index in Princeton?

Months with the highest UV index in Princeton are June through August, with an average maximum UV index of 6.

What is the warmest month in Princeton?

The warmest month in Princeton is July, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 66.9°F (19.4°C).

What is the rainiest month in Princeton?

The month with the most rainfall is July when the rain falls for 13.9 days and typically aggregates up to 1.69" (43mm) of precipitation.

What month has the most sunshine in Princeton?

The month with the most sunshine in Princeton, New Jersey, is July, with an average of 10.5h of sunshine.

What is the driest month in Princeton?

The month with the least rainfall in Princeton, New Jersey, is September when the rain falls for 10 days and typically collects 0.67" (17mm) of precipitation.

What is the most humid month in Princeton?

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

What is the month with the shortest days in Princeton?

With an average of 9.3h of daylight, December has the shortest days of the year in Princeton, New Jersey.

Average temperature
Princeton, NJ

Average temperature - Princeton, NJ

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).

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
Princeton, NJ

Average pressure - Princeton, NJ

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

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Average wind speed
Princeton, NJ

Average wind speed - Princeton, NJ

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 rainfall
Princeton, NJ

Average rainfall - Princeton, NJ

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
Princeton, NJ

Average rainfall days - Princeton, NJ

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
Princeton, NJ

Average snowfall - Princeton, NJ

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

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Average snowfall days
Princeton, NJ

Average snowfall days - Princeton, NJ

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

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Average daylight / Average sunshine
Princeton, NJ

Average daylight / Average sunshine - Princeton, NJ

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days
Princeton, NJ

Average sunshine days - Princeton, NJ

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
Princeton, NJ

Average UV index - Princeton, NJ

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

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Average visibility
Princeton, NJ

Average visibility - Princeton, NJ

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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