January weather forecast
Princeton Junction, NJ

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Weather in January

January, like December, in Princeton Junction, New Jersey, is another cold winter month, with an average temperature fluctuating between 24.3°F (-4.3°C) and 36.9°F (2.7°C).

Temperature

Princeton Junction's coldest month, January, generally records average temperatures ranging from a high of 36.9°F (2.7°C) to a low of 24.3°F (-4.3°C).

Humidity

In Princeton Junction, New Jersey, the average relative humidity in January is 75%.

Rainfall

In January, in Princeton Junction, the rain falls for 6.1 days. Throughout January, 0.71" (18mm) of precipitation is accumulated. In Princeton Junction, during the entire year, the rain falls for 119.3 days and collects up to 12.72" (323mm) of precipitation.

Snowfall

Months with snowfall are January through May, November and December. In Princeton Junction, in January, snow falls for 4.6 days, with typically accumulated 0.79" (20mm) of snow. Throughout the year, there are 16.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

Daylight

In Princeton Junction, the average length of the day in January is 9h and 41min.
On the first day of the month, sunrise is at 7:21 am and sunset at 4:42 pm. On the last day of January, sunrise is at 7:08 am and sunset at 5:15 pm EST.

Sunshine

The average sunshine in January is 5.1h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 2 during January morphs into the following directions:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Princeton Junction's coldest month, January, registers temperatures that range from a high of 36.9°F (2.7°C) to a low of 24.3°F (-4.3°C).

How cold is it in January?

Princeton Junction in January has an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.3°F (-4.3°C).

What is the average humidity in January?

In January, the average relative humidity is 75%.

How much does it rain in January?

In January, the rain falls for 6.1 days. Throughout January, 0.71" (18mm) of precipitation is accumulated.

How many days does it snow in January?

In Princeton Junction, in January, snow falls for 4.6 days, with typically accumulated 0.79" (20mm) of snow.

How many hours of daylight does Princeton Junction have in January?

In January, the average day length is 9h and 41min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:21 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:15 pm EST.

How long on average sun shines in January?

In Princeton Junction, the average sunshine duration in January is 5.1h.

When is the lowest UV index?

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

What is the UV index intensity in January?

In Princeton Junction, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Princeton Junction, NJ

Average temperature in January - Princeton Junction, NJ
  • Average high temperature in January: 36.9°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 January: 24.3°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).

Average pressure in January
Princeton Junction, NJ

Average pressure in January - Princeton Junction, NJ
  • Average pressure in January: 30.07"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).

Average wind speed in January
Princeton Junction, NJ

Average wind speed in January - Princeton Junction, NJ
  • Average wind speed in January: 8.5mph

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).

Average humidity in January
Princeton Junction, NJ

Average humidity in January - Princeton Junction, NJ
  • Average humidity in January: 75%

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

Average rainfall in January
Princeton Junction, NJ

Average rainfall in January - Princeton Junction, NJ
  • Average rainfall in January: 0.71"

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

Average rainfall days in January
Princeton Junction, NJ

Average rainfall days in January - Princeton Junction, NJ
  • Average rainfall days in January: 6.1 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).

Average snowfall in January
Princeton Junction, NJ

Average snowfall in January - Princeton Junction, NJ
  • Average snowfall in January: 0.79"

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

Average snowfall days in January
Princeton Junction, NJ

Average snowfall days in January - Princeton Junction, NJ
  • Average snowfall days in January: 4.6 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).

Average daylight in January /
Average sunshine in January
Princeton Junction, NJ

Average daylight in January / Average sunshine in January - Princeton Junction, NJ
  • Average daylight in January: 9h and 4min

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 January: 5h and 1min

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).

Average sunshine days in January
Princeton Junction, NJ

Average sunshine days in January - Princeton Junction, NJ
  • Average sunshine days in January: 21.8 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).

Average UV index in January
Princeton Junction, NJ

Average UV index in January - Princeton Junction, NJ
  • Average UV index in January: 2

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).

Average cloud cover in January
Princeton Junction, NJ

Average cloud cover in January - Princeton Junction, NJ
  • Average cloud cover in January: 44

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).

Average visibility in January
Princeton Junction, NJ

Average visibility in January - Princeton Junction, NJ
  • Average visibility in January: 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).

Princeton Junction, New Jersey, USA

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