January weather forecast
Chatham, NJ

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Weather in January

January, the same as December, is another cold winter month in Chatham, New Jersey, with an average temperature fluctuating between 35.1°F (1.7°C) and 22.5°F (-5.3°C).

Temperature

Chatham's coldest month, January, generally records average temperatures ranging from a high of 35.1°F (1.7°C) to a low of 22.5°F (-5.3°C).

Humidity

The average relative humidity in January in Chatham, New Jersey, is 77%.

Rainfall

In Chatham, in January, during 8.8 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, in Chatham, there are 164.2 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Chatham. In Chatham, in January, snow falls for 7.6 days, with typically accumulated 2.17" (55mm) of snow. Throughout the year, in Chatham, New Jersey, there are 26 snowfall days, and 11.61" (295mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 39min.
On the first day of January, sunrise is at 7:21 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:13 pm EST.

Sunshine

The average sunshine in January is 4.9h.

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 low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 2 during January translates into these guidelines:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

What is the coldest month in Chatham?

Temperature records in Chatham mark January as the coldest month, with highs averaging 35.1°F (1.7°C) and lows at 22.5°F (-5.3°C).

How cold is it in Chatham in January?

In January, the average high-temperature and low-temperature are 35.1°F (1.7°C) and 22.5°F (-5.3°C) respectively.

What is the average humidity in January in Chatham?

In January, the average relative humidity in Chatham is 77%.

How much does it rain in Chatham in January?

In Chatham, in January, during 8.8 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

How many days does it snow in January in Chatham?

In Chatham, New Jersey, in January, snow falls for 7.6 days, with typically accumulated 2.17" (55mm) of snow.

What is the average length of the day in January in Chatham?

In January, the average day length is 9h and 39min.

When are sunrise and sunset in January in Chatham?

On the first day of January, sunrise is at 7:21 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:13 pm EST.

How long on average sun shines in January in Chatham?

In Chatham, the average sunshine duration in January is 4.9h.

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

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

What is the UV index reading in January in Chatham?

The average daily maximum UV index in January in Chatham, New Jersey, is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
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
Chatham, NJ

Average temperature in January - Chatham, NJ
  • Average high temperature in January: 35.1°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in January: 22.5°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in January
Chatham, NJ

Average pressure in January - Chatham, 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).

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Average wind speed in January
Chatham, NJ

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

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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Average humidity in January
Chatham, NJ

Average humidity in January - Chatham, NJ
  • Average humidity in January: 77%

The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April and August (74%).

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Average rainfall in January
Chatham, NJ

Average rainfall in January - Chatham, NJ
  • Average rainfall in January: 1.93"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").

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Average rainfall days in January
Chatham, NJ

Average rainfall days in January - Chatham, NJ
  • Average rainfall days in January: 8.8 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in January
Chatham, NJ

Average snowfall in January - Chatham, NJ
  • Average snowfall in January: 2.17"

The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Chatham, NJ

Average snowfall days in January - Chatham, NJ
  • Average snowfall days in January: 7.6 days

The month with the highest number of snowfall days is January (7.6 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
Chatham, NJ

Average daylight in January / Average sunshine in January - Chatham, 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 18min).

  • Average sunshine in January: 4h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in January
Chatham, NJ

Average sunshine days in January - Chatham, NJ
  • Average sunshine days in January: 16.9 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).

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Average UV index in January
Chatham, NJ

Average UV index in January - Chatham, 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).

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Average cloud cover in January
Chatham, NJ

Average cloud cover in January - Chatham, NJ
  • Average cloud cover in January: 46

The months with the most cloud cover are February and March (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).

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Average visibility in January
Chatham, NJ

Average visibility in January - Chatham, 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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Chatham, New Jersey, USA

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