January weather forecast
Trenton, NJ

A full aerial view of Trenton, New Jersey, with the George Washington statue
A full aerial view of Trenton, New Jersey, with the George Washington statue

Weather in January

January, the same as December, is a wintry winter month in Trenton, New Jersey, with an average temperature fluctuating between 36.9°F (2.7°C) and 24.8°F (-4°C).

Temperature

January is the coldest month, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.8°F (-4°C).

Humidity

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

Rainfall

January is the month with the least rainfall in Trenton. Rain falls for 7.9 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Trenton, New Jersey. In Trenton, New Jersey, snow falls for 4.8 days, with typically accumulated 1.69" (43mm) of snow. Throughout the year, there are 16.6 snowfall days, and 8.86" (225mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 42min.
On the first day of the month, sunrise is at 7:21 am and sunset at 4:43 pm. On the last day of January, in Trenton, sunrise is at 7:08 am and sunset at 5:16 pm EST.

Sunshine

In Trenton, 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 value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Trenton?

January is the coldest month in Trenton, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.8°F (-4°C).

What is the temperature in January in Trenton?

The average high-temperature, in January, in Trenton, New Jersey, is 36.9°F (2.7°C), while the average low-temperature is 24.8°F (-4°C).

What is the average humidity in January in Trenton?

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

What is the driest month in Trenton?

January is the month with the least rainfall. Rain falls for 7.9 days and accumulates 1.85" (47mm) of precipitation.

How many days does it rain in January in Trenton?

In Trenton, in January, during 7.9 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

How much does it snow in Trenton in January?

In Trenton, in January, during 4.8 snowfall days, 1.69" (43mm) of snow is typically accumulated.

How many hours of daylight does Trenton have in January?

In Trenton, New Jersey, the average day length in January is 9h and 42min.

What time are sunrise and sunset in January in Trenton?

On the first day of January, sunrise is at 7:21 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:16 pm EST.

How long on average sun shines in January in Trenton?

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

When is the lowest UV index in Trenton?

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

How high is the UV index in January in Trenton?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Trenton, NJ

Average temperature in January - Trenton, NJ
  • Average high temperature in January: 36.9°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in January: 24.8°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in January
Trenton, NJ

Average pressure in January - Trenton, NJ
  • Average pressure in January: 30.08"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 January
Trenton, NJ

Average wind speed in January - Trenton, NJ
  • Average wind speed in January: 8.3mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in January
Trenton, NJ

Average humidity in January - Trenton, NJ
  • Average humidity in January: 75%

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in January
Trenton, NJ

Average rainfall in January - Trenton, NJ
  • Average rainfall in January: 1.85"

The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in January
Trenton, NJ

Average rainfall days in January - Trenton, NJ
  • Average rainfall days in January: 7.9 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in January
Trenton, NJ

Average snowfall in January - Trenton, NJ
  • Average snowfall in January: 1.69"

The month with the highest snowfall is March (2.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Trenton, NJ

Average snowfall days in January - Trenton, NJ
  • Average snowfall days in January: 4.8 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Trenton, NJ

Average daylight in January / Average sunshine in January - Trenton, NJ
  • Average daylight in January: 9h and 42min

The month with the longest days is June (Average daylight: 14h and 59min).
The month with the shortest days is December (Average daylight: 9h and 22min).

  • Average sunshine in January: 5h and 6min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in January
Trenton, NJ

Average sunshine days in January - Trenton, NJ
  • Average sunshine days in January: 19.5 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in January
Trenton, NJ

Average UV index in January - Trenton, NJ
  • Average UV index in January: 2

The months with the highest UV index are May, 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 January
Trenton, NJ

Average cloud cover in January - Trenton, 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 32).

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Average visibility in January
Trenton, NJ

Average visibility in January - Trenton, 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).

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