January weather forecast and climate
Nassau, DE

January, the same as December, is another cold winter month in Nassau, Delaware, with average temperature ranging between min 32°F (0°C) and max 41.2°F (5.1°C).

Temperature

January is the coldest month, with an average high-temperature of 41.2°F (5.1°C) and an average low-temperature of 32°F (0°C).

Humidity

In Nassau, Delaware, the average relative humidity in January is 74%.

Rainfall

January is the month with the least rainfall in Nassau. Rain falls for 9.6 days and accumulates 2.2" (56mm) of precipitation.

Snowfall

Months with snowfall in Nassau are January through March, November and December. January is the month with the most snowfall in Nassau. Snow falls for 3.7 days and accumulates 0.98" (25mm) of snow.

Daylight

In January, the average length of the day in Nassau is 9.8h.

Sunshine

In January, the average sunshine in Nassau is 5.5h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Nassau, Delaware. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for average individuals.
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 solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Nassau?

The coldest month in Nassau, Delaware, is January, with an average high-temperature of 41.2°F (5.1°C) and an average low-temperature of 32°F (0°C).

What is the temperature in January in Nassau?

The average high-temperature, in January, is 41.2°F (5.1°C), while the average low-temperature is 32°F (0°C).

What is the average humidity in January in Nassau?

In Nassau, the average relative humidity in January is 74%.

How many days does it rain in January in Nassau?

In Nassau, Delaware, in January, during 9.6 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

What is the driest month in Nassau?

January is the month with the least rainfall. Rain falls for 9.6 days and accumulates 2.2" (56mm) of precipitation.

How much does it snow in Nassau in January?

In January, it is snowing for 3.7 days. Throughout January, 0.98" (25mm) of snow is accumulated.

What is the snowiest month in Nassau?

January is the month with the most snowfall in Nassau. Snow falls for 3.7 days and accumulates 0.98" (25mm) of snow.

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

In Nassau, Delaware, the average length of the day in January is 9.8h.

How long on average sun shines in January in Nassau?

In January, the average sunshine in Nassau, Delaware, is 5.5h.

When is the lowest UV index in Nassau?

Months with the lowest UV index are January and December, with an average maximum UV index of 2.

What is the UV index reading in January in Nassau?

In Nassau, Delaware, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in January - Nassau, DE
  • Average high temperature in January: 41.2°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (41.2°F).

  • Average low temperature in January: 32°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (32°F).

Average pressure in January - Nassau, DE
  • Average pressure in January: 30.09"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

Average wind speed in January - Nassau, DE
  • Average wind speed in January: 12.5mph

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

Average humidity in January - Nassau, DE
  • Average humidity in January: 74%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).

Average rainfall in January - Nassau, DE
  • Average rainfall in January: 2.2"

The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.2").

Average rainfall days in January - Nassau, DE
  • Average rainfall days in January: 9.6 days

The month with the highest number of rainy days is July (18.6 days).
The month with the least rainy days is January (9.6 days).

Average snowfall in January - Nassau, DE
  • Average snowfall in January: 0.98"

The month with the highest snowfall is January (0.98").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in January - Nassau, DE
  • Average snowfall days in January: 3.7 days

The month with the highest number of snowfall days is January (3.7 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in January / Average sunshine in January - Nassau, DE
  • Average daylight in January: 9.8h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in January: 5.5h

The month with the most sunshine is July (Average sunshine: 11h).
The month with the least sunshine is February (Average sunshine: 5h).

Average sunshine days in January - Nassau, DE
  • Average sunshine days in January: 17.1 days

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (9.8 days).

Average UV index in January - Nassau, DE
  • Average UV index in January: 2

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

Average cloud cover in January - Nassau, DE
  • Average cloud cover in January: 41

Months with the most cloud cover are February and March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).

Average visibility in January - Nassau, DE
  • Average visibility in January: 6mi

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