January weather forecast and climate
Dover, NJ

January, the same as December, is another cold winter month in Dover, New Jersey, with average temperature ranging between max 34.3°F (1.3°C) and min 20.8°F (-6.2°C).

Temperature

With an average high-temperature of 34.3°F (1.3°C) and an average low-temperature of 20.8°F (-6.2°C), January is the coldest month.

Humidity

The average relative humidity is 78%.

Rainfall

In January, the rain falls for 4.2 days. Throughout January, 0.43" (11mm) of precipitation is accumulated. Throughout the year, in Dover, New Jersey, there are 81.9 rainfall days, and 6.69" (170mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Dover. In Dover, snow falls for 4.5 days, with typically accumulated 0.51" (13mm) of snow. Throughout the year, there are 18.1 snowfall days, and 2.68" (68mm) of snow is accumulated.

Daylight

The average length of the day in Dover is 9.6h.

Sunshine

In Dover, New Jersey, the average sunshine in January is 4.8h.

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 reading of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 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 Dover?

January is the coldest month in Dover, New Jersey, with an average high-temperature of 34.3°F (1.3°C) and an average low-temperature of 20.8°F (-6.2°C).

What is the temperature in January in Dover?

The average high-temperature, in January, is 34.3°F (1.3°C), while the average low-temperature is 20.8°F (-6.2°C).

What is the average humidity in January in Dover?

In Dover, the average relative humidity in January is 78%.

How much does it rain in Dover in January?

In Dover, during January, the rain falls for 4.2 days and regularly aggregates up to 0.43" (11mm) of precipitation.

How many days does it snow in January in Dover?

In Dover, New Jersey, during January, snow falls for 4.5 days and regularly aggregates up to 0.51" (13mm) of snow.

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

The average length of the day in January is 9.6h.

How many hours of sunshine does Dover have in January?

In Dover, the average sunshine in January is 4.8h.

When is the lowest UV index in Dover?

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

What is the UV index reading in January in Dover?

In Dover, New Jersey, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to the UV radiation.
Average temperature in January - Dover, NJ
  • Average high temperature in January: 1.3°C

The warmest month (with the highest average high temperature) is July (28.3°C).
The month with the lowest average high temperature is January (1.3°C).

  • Average low temperature in January: -6.2°C

The month with the highest average low temperature is July (17.8°C).
The coldest month (with the lowest average low temperature) is January (-6.2°C).

Average pressure in January - Dover, NJ
  • Average pressure in January: 1018.3mbar

The month with the highest atmospheric pressure is November (1019.6mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in January - Dover, NJ
  • Average wind speed in January: 13km/h

The windiest month (with the highest average wind speed) is March (13.2km/h).
The calmest month (with the lowest average wind speed) is August (8.2km/h).

Average humidity in January - Dover, NJ
  • Average humidity in January: 78%

Months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).

Average rainfall in January - Dover, NJ
  • Average rainfall in January: 11mm

The wettest month (with the highest rainfall) is July (20mm).
The driest month (with the least rainfall) is September (4mm).

Average rainfall days in January - Dover, NJ
  • Average rainfall days in January: 4.2 days

The month with the highest number of rainy days is July (9.5 days).
The month with the least rainy days is February (4 days).

Average snowfall in January - Dover, NJ
  • Average snowfall in January: 13mm

The month with the highest snowfall is March (20mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in January - Dover, NJ
  • Average snowfall days in January: 4.5 days

The month with the highest number of snowfall days is February (5.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Dover, 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: 4.8h

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.4h).

Average sunshine days in January - Dover, NJ
  • Average sunshine days in January: 24.3 days

The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (18.3 days).

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

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

Average cloud cover in January - Dover, NJ
  • Average cloud cover in January: 48

Months with the most cloud cover are February and March (Cloud cover 51).
Months with the least cloud cover are July and August (Cloud cover 36).

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

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