January weather forecast and climate
Greendell, NJ

January, like December, in Greendell, New Jersey, is another cold winter month, with temperature in the range of an average low of 20.3°F (-6.5°C) and an average high of 33.3°F (0.7°C).

Temperature

The coldest month is January, with an average high-temperature of 33.3°F (0.7°C) and an average low-temperature of 20.3°F (-6.5°C).

Humidity

The average relative humidity in January is 79%.

Rainfall

In Greendell, in January, during 7.5 rainfall days, 1.89" (48mm) of precipitation is typically accumulated. Throughout the year, there are 161.1 rainfall days, and 28.98" (736mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Greendell, the average length of the day in January is 9.6h.

Sunshine

In Greendell, the average sunshine is 4.7h.

UV index

In Greendell, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from the exposure to the Sun's UV rays for the average person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Greendell?

January is the coldest month 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).

What is the temperature in January in Greendell?

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

What is the average humidity in January in Greendell?

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

How many days does it rain in January in Greendell?

In Greendell, in January, it is raining for 7.5 days, with typically 1.89" (48mm) of accumulated precipitation.

How much does it snow in Greendell in January?

In January, it is snowing for 10.3 days. Throughout January, 4.29" (109mm) of snow is accumulated.

What is the snowiest month in Greendell?

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

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

In January, the average length of the day in Greendell is 9.6h.

How many hours of sunshine does Greendell have in January?

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

What is the UV index intensity in January in Greendell?

In January, the average daily maximum UV index in Greendell is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.
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).

Average pressure in January - Greendell, NJ
  • Average pressure in January: 30.07"

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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).

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

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

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").

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

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).

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

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

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).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Greendell, NJ
  • Average daylight in January: 9.6h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in January: 4.7h

The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 4.3h).

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).

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).

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).
Months with the least cloud cover are July and August (Cloud cover 37).

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

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