January weather forecast and climate
Griggstown, NJ

January, the same as December, is another cold winter month in Griggstown, New Jersey, with average temperature ranging between max 36.9°F (2.7°C) and min 24.3°F (-4.3°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 24.3°F (-4.3°C).

Humidity

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

Rainfall

In Griggstown, in January, during 6.1 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Griggstown, during the entire year, the rain falls for 119.3 days and collects up to 12.72" (323mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In Griggstown, snow falls for 4.6 days, with typically accumulated 0.79" (20mm) of snow. Throughout the year, in Griggstown, there are 16.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

Daylight

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

Sunshine

The average sunshine is 5.1h.

UV index

Months with the lowest UV index in Griggstown are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 2 in January transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Griggstown?

The coldest month in Griggstown, New Jersey, is January, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 24.3°F (-4.3°C).

What is the temperature in January in Griggstown?

The average high-temperature, in January, in Griggstown, New Jersey, is 36.9°F (2.7°C), while the average low-temperature is 24.3°F (-4.3°C).

What is the average humidity in January in Griggstown?

The average relative humidity in January in Griggstown is 75%.

How many days does it rain in January in Griggstown?

In Griggstown, in January, during 6.1 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

How much does it snow in Griggstown in January?

In Griggstown, during January, snow falls for 4.6 days and regularly aggregates up to 0.79" (20mm) of snow.

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

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

How many hours of sunshine does Griggstown have in January?

The average sunshine in January in Griggstown is 5.1h.

When is the lowest UV index in Griggstown?

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

What is the UV index intensity in January in Griggstown?

The average daily maximum UV index in January in Griggstown is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in January - Griggstown, NJ
  • Average high temperature in January: 2.7°C

The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in January: -4.3°C

The month with the highest average low temperature is July (19.4°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in January - Griggstown, NJ
  • Average pressure in January: 1018.4mbar

The month with the highest atmospheric pressure is November (1019.7mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in January - Griggstown, NJ
  • Average wind speed in January: 13.6km/h

The windiest month (with the highest average wind speed) is March (14.1km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).

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

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in January - Griggstown, NJ
  • Average rainfall in January: 18mm

The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is September (17mm).

Average rainfall days in January - Griggstown, NJ
  • Average rainfall days in January: 6.1 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

Average snowfall in January - Griggstown, NJ
  • Average snowfall in January: 20mm

The month with the highest snowfall is March (36mm).
Months with the least snowfall are June, July, August, September and October (0mm).

Average snowfall days in January - Griggstown, NJ
  • Average snowfall days in January: 4.6 days

The month with the highest number of snowfall days is January (4.6 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in January / Average sunshine in January - Griggstown, 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: 5.1h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in January - Griggstown, NJ
  • Average sunshine days in January: 21.8 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

Average UV index in January - Griggstown, 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, March, November and December (UV index 2).

Average cloud cover in January - Griggstown, NJ
  • Average cloud cover in January: 44

Months with the most cloud cover are February, March and December (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 33).

Average visibility in January - Griggstown, NJ
  • Average visibility in January: 9km

Months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is May (8km).