January weather forecast
Greendell, NJ

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Weather in January

January, the same as December, is a wintry winter month in Greendell, New Jersey, with an average temperature varying between 20.3°F (-6.5°C) and 33.3°F (0.7°C).

Temperature

January, with its average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 20.3°F (-6.5°C), holds the record as the coldest month.

Humidity

In Greendell, the average relative humidity in January is 79%.

Rainfall

In Greendell, during January, the rain falls for 7.5 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Greendell, New Jersey, during the entire year, the rain falls for 161.1 days and collects up to 28.98" (736mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. The months with the most snowfall are January and February, with an average 4.29" (109mm) of accumulated snow.

Daylight

In January, the average length of the day is 9h and 38min.
On the first day of January in Greendell, sunrise is at 7:23 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:14 pm EST.

Sunshine

The average sunshine in January in Greendell is 4.7h.

UV index

In January, the average daily maximum UV index in Greendell, New Jersey, is 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 2 during January translates into the following recommendations:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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Frequently asked questions

What are the coldest months in Greendell?

With an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 20.3°F (-6.5°C), January is the coldest month in Greendell, New Jersey.

How cold is January in Greendell?

In Greendell, in January, the average high-temperature is 33.3°F (0.7°C), and the average low-temperature is 20.3°F (-6.5°C).

What is the average humidity in January in Greendell?

In Greendell, New Jersey, the average relative humidity in January is 79%.

How many days does it rain in January in Greendell?

In January, the rain falls for 7.5 days. Throughout January, 1.89" (48mm) of precipitation is accumulated.

What is the snowiest month in Greendell?

The months with the most snowfall in Greendell are January and February, with an average 4.29" (109mm) of accumulated snow.

How many days does it snow in January in Greendell?

In Greendell, in January, during 10.3 snowfall days, 4.29" (109mm) of snow is typically accumulated.

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

In January, the average day length is 9h and 38min.

When is the sunrise / sunset in January in Greendell?

On the first day of January in Greendell, sunrise is at 7:23 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 5:14 pm EST.

How many hours of sunshine does Greendell have in January?

In Greendell, the average sunshine duration in January is 4.7h.

What is the UV index reading in January in Greendell?

In January, the average daily maximum UV index in Greendell is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from 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
Greendell, NJ

Average temperature in January - Greendell, NJ
  • Average high temperature in January: 33.3°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in January: 20.3°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

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Average pressure in January
Greendell, NJ

Average pressure in January - Greendell, 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
Greendell, NJ

Average wind speed in January - Greendell, NJ
  • Average wind speed in January: 7.7mph

The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in January
Greendell, NJ

Average humidity in January - Greendell, NJ
  • Average humidity in January: 79%

The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in January
Greendell, NJ

Average rainfall in January - Greendell, NJ
  • Average rainfall in January: 1.89"

The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in January
Greendell, NJ

Average rainfall days in January - Greendell, NJ
  • Average rainfall days in January: 7.5 days

The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (7.5 days).

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Average snowfall in January
Greendell, NJ

Average snowfall in January - Greendell, NJ
  • Average snowfall in January: 4.29"

The months with the highest snowfall are January and February (4.29").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Greendell, NJ

Average snowfall days in January - Greendell, NJ
  • Average snowfall days in January: 10.3 days

The month with the highest number of snowfall days is January (10.3 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
Greendell, NJ

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

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Average sunshine days in January
Greendell, NJ

Average sunshine days in January - Greendell, NJ
  • Average sunshine days in January: 16.5 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in January
Greendell, NJ

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

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
Greendell, NJ

Average cloud cover in January - Greendell, NJ
  • Average cloud cover in January: 49

The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 37).

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Average visibility in January
Greendell, NJ

Average visibility in January - Greendell, NJ
  • Average visibility in January: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

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Greendell, New Jersey, USA

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