January weather forecast and climate
Holmdel, NJ

January, the same as December, is a wintry winter month in Holmdel, New Jersey, with average temperature varying between 27.3°F (-2.6°C) and 37.8°F (3.2°C).

Temperature

The coldest month is January, with an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 27.3°F (-2.6°C).

Humidity

In Holmdel, the average relative humidity is 74%.

Rainfall

In Holmdel, it is raining for 3.4 days, with typically 0.35" (9mm) of accumulated precipitation. In Holmdel, during the entire year, the rain falls for 68.3 days and collects up to 5.75" (146mm) of precipitation.

Snowfall

Months with snowfall in Holmdel, New Jersey, are January through March and December. January is the month with the most snowfall in Holmdel. Snow falls for 2.5 days and accumulates 0.16" (4mm) of snow.

Daylight

In Holmdel, the average length of the day in January is 9.7h.

Sunshine

In January, the average sunshine is 5.2h.

UV index

Months with the lowest UV index in Holmdel are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected 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:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Holmdel?

The coldest month in Holmdel, New Jersey, is January, with an average high-temperature of 37.8°F (3.2°C) and an average low-temperature of 27.3°F (-2.6°C).

What is the temperature in January in Holmdel?

In January, in Holmdel, the average high-temperature is 37.8°F (3.2°C), and the average low-temperature is 27.3°F (-2.6°C).

What is the average humidity in January in Holmdel?

In Holmdel, New Jersey, the average relative humidity in January is 74%.

How much does it rain in Holmdel in January?

In Holmdel, in January, during 3.4 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

How much does it snow in Holmdel in January?

In Holmdel, during January, snow falls for 2.5 days and regularly aggregates up to 0.16" (4mm) of snow.

When does it snow the most in Holmdel?

January is the month with the most snowfall in Holmdel. Snow falls for 2.5 days and accumulates 0.16" (4mm) of snow.

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

In January, the average length of the day in Holmdel, New Jersey, is 9.7h.

How many hours of sunshine does Holmdel have in January?

The average sunshine in January in Holmdel, New Jersey, is 5.2h.

When is the lowest UV index in Holmdel?

January, February, 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 Holmdel?

In Holmdel, New Jersey, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in January - Holmdel, NJ
  • Average high temperature in January: 3.2°C

The warmest month (with the highest average high temperature) is July (27.6°C).
The month with the lowest average high temperature is January (3.2°C).

  • Average low temperature in January: -2.6°C

The month with the highest average low temperature is July (21°C).
The coldest month (with the lowest average low temperature) is January (-2.6°C).

Average pressure in January - Holmdel, NJ
  • Average pressure in January: 1018.1mbar

The month with the highest atmospheric pressure is November (1019.5mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in January - Holmdel, NJ
  • Average wind speed in January: 17.9km/h

The windiest month (with the highest average wind speed) is January (17.9km/h).
The calmest month (with the lowest average wind speed) is July (11.5km/h).

Average humidity in January - Holmdel, NJ
  • Average humidity in January: 74%

Months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (73%).

Average rainfall in January - Holmdel, NJ
  • Average rainfall in January: 9mm

The wettest month (with the highest rainfall) is July (18mm).
The driest month (with the least rainfall) is September (3mm).

Average rainfall days in January - Holmdel, NJ
  • Average rainfall days in January: 3.4 days

The month with the highest number of rainy days is July (8 days).
The month with the least rainy days is January (3.4 days).

Average snowfall in January - Holmdel, NJ
  • Average snowfall in January: 4mm

The month with the highest snowfall is January (4mm).
Months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in January - Holmdel, NJ
  • Average snowfall days in January: 2.5 days

The month with the highest number of snowfall days is February (2.6 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in January / Average sunshine in January - Holmdel, NJ
  • Average daylight in January: 9.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in January: 5.2h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in January - Holmdel, NJ
  • Average sunshine days in January: 25.7 days

The month with the most sunshine days is January (25.7 days).
The month with the least sunshine days is July (17.3 days).

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in January - Holmdel, NJ
  • Average cloud cover in January: 43

Months with the most cloud cover are February, March and December (Cloud cover 46).
Months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in January - Holmdel, NJ
  • Average visibility in January: 10km

Months with the highest visibility are January, February, March, April, July, August, September, October, November and December (10km).
Months with the lowest visibility are May and June (9km).