Climate and monthly weather forecast
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, the same as December, is a wintry winter month in Princeton, New Jersey, with temperature in the range of an average high of 36.9°F (2.7°C) and an average low of 24.3°F (-4.3°C). 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. Weather in January »

Weather in February

February, the last month of the winter in Princeton, is also a wintry month, with an average temperature fluctuating between 26.1°F (-3.3°C) and 39.9°F (4.4°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 chilly month, with an average temperature varying between 33.3°F (0.7°C) and 48.6°F (9.2°C). In Princeton, the average high-temperature in March 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 is a moderate spring month in Princeton, New Jersey, with an average temperature varying between 60.4°F (15.8°C) and 43.3°F (6.3°C). In April, the average high-temperature increases from a chilly 48.6°F (9.2°C) in March to a mild 60.4°F (15.8°C). Weather in April »

Weather in May

May, the last month of the spring in Princeton, is a pleasant month, with an average temperature fluctuating between 53.2°F (11.8°C) and 70.5°F (21.4°C). In Princeton, the average high-temperature in May increases from a mild 60.4°F (15.8°C) in April to a pleasant 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 an average temperature fluctuating between 61°F (16.1°C) and 78.4°F (25.8°C). In Princeton, the average high-temperature in June slightly increases 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 a moderately hot summer month, with an average temperature fluctuating between 84.7°F (29.3°C) and 66.9°F (19.4°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). The average heat index in July is evaluated at a tropical 93.9°F (34.4°C). Weather in July »

Weather in August

August, the last month of the summer in Princeton, is also a moderately hot month, with an average temperature ranging between min 65.8°F (18.8°C) and max 82.9°F (28.3°C). In August, the average high-temperature is almost the same as in July - a still warm 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 an average temperature ranging between min 59°F (15°C) and max 75.7°F (24.3°C). In Princeton, the average high-temperature in September marginally drops from 82.9°F (28.3°C) in August to a still moderately hot 75.7°F (24.3°C). Weather in September »

Weather in October

October, like September, in Princeton, New Jersey, is another comfortable autumn month, with temperature in the range of an average low of 49.1°F (9.5°C) and an average high of 63.9°F (17.7°C). In October, the average high-temperature drops from a moderately hot 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 temperature in the range of an average low of 37.8°F (3.2°C) and an average high of 51.8°F (11°C). In Princeton, the average high-temperature in November decreases 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

December, the first month of the winter in Princeton, is also a frosty month, with an average temperature ranging between min 31.1°F (-0.5°C) and max 43°F (6.1°C). In December, the average high-temperature marginally drops from a cool 51.8°F (11°C) in November to a frosty 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, New Jersey, there are 119.3 rainfall days, and 12.72" (323mm) of precipitation is accumulated.

When does it snow in Princeton?

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

How much does it snow in Princeton?

Throughout the year, there are 16.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

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

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

What is the month with the least sunshine in Princeton?

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

What is the snowiest month in Princeton?

The month with the most snowfall in Princeton is March, when snow falls for 3.7 days and typically aggregates up to 1.42" (36mm) of snow.

When is Daylight Saving Time (DST) in Princeton?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts in Princeton, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Princeton?

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

When it does not snow in Princeton?

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

When are the longest days in Princeton?

The month with the longest days in Princeton, New Jersey, is June, with an average of 15h and 1min of daylight.

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

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

What is the warmest month in Princeton?

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

What is the wettest month in Princeton?

The month with the most rainfall in Princeton 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 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 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?

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

What is the month with the shortest days in Princeton?

The month with the shortest days is December, with an average of 9h and 21min of daylight.

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

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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").
The 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).
The 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 and 1min).
The month with the shortest days is December (Average daylight: 9h and 21min).

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
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

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
Princeton, NJ

Average cloud cover - Princeton, NJ

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
Princeton, NJ

Average visibility - Princeton, NJ

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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