January weather forecast
Lewes, DE

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Weather in January

January's weather is typified by cold temperatures, higher wind speeds, and frequent precipitation. Often cloaked with a white blanket of snow, Lewes experiences frosty mornings with a low temperature of 32°F (0°C), while afternoon highs may reach up to 41.2°F (5.1°C). It also marks the beginning of the year with approximately 9.8 hours of daylight per day, leading to short and chilly winter days. Notably, January weather differs significantly from the warmer temperatures of December. There is a marked increase in wind speed and a drop in sea temperature, creating a distinctly colder environment at the beginning of the year.

Temperature

January is the month when Lewes sees the lowest average temperatures, with a high of 41.2°F (5.1°C) and a low of 32°F (0°C).

Humidity

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

Rainfall

The month with the least rainfall in Lewes is January, when the rain falls for 9.6 days and typically collects 2.2" (56mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall. The month with the most snowfall is January, when snow falls for 3.7 days and typically aggregates up to 0.98" (25mm) of snow.

Ocean temperature

In January, the average ocean temperature in Lewes is 42.4°F (5.8°C).
Note: Engaging in a swim in 42.4°F (5.8°C) can threaten life. Brief exposure to 55.4°F (13°C) waters is uneasy, and submersion below 50°F (10°C) can lead to cold shock and disrupted breathing patterns, varying by individual.

Daylight

In January, the average length of the day in Lewes is 9h and 49min.
On the first day of the month, sunrise is at 7:18 am and sunset at 4:49 pm. On the last day of January, sunrise is at 7:07 am and sunset at 5:20 pm EST.

Sunshine

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

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, an average UV index of 2 transforms 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. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Frequently asked questions

What part of the year is the coldest in Lewes?

Lewes, Delaware, notes the coldest temperatures in January, with a average high of 41.2°F (5.1°C) and a low of 32°F (0°C).

How cold is January in Lewes?

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

What is the average humidity in January in Lewes?

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

What is the driest month in Lewes?

The month with the least rainfall in Lewes is January, when the rain falls for 9.6 days and typically collects 2.2" (56mm) of precipitation.

How much does it rain in Lewes in January?

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

What is the snowiest month in Lewes?

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

How much does it snow in Lewes in January?

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

What is the water temperature in January in Lewes?

In Lewes, in January, the average water temperature is 42.4°F (5.8°C). Swimming in 42.4°F (5.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

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

In Lewes, the average day length in January is 9h and 49min.

What time are sunrise and sunset in January in Lewes?

On the first day of January, sunrise is at 7:18 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 5:20 pm EST.

How many hours of sunshine does Lewes have in January?

In January, the average sunshine duration in Lewes is 5.5h.

What is the month with the lowest UV index in Lewes?

The months with the lowest UV index in Lewes, Delaware, are January and December, with an average maximum UV index of 2.

How high is the UV index in January in Lewes?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Lewes, DE

Average temperature in January - Lewes, 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).

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Average pressure in January
Lewes, DE

Average pressure in January - Lewes, DE
  • Average pressure in January: 30.09"Hg

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

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Average wind speed in January
Lewes, DE

Average wind speed in January - Lewes, 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).

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Average humidity in January
Lewes, DE

Average humidity in January - Lewes, 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%).

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Average rainfall in January
Lewes, DE

Average rainfall in January - Lewes, 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").

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Average rainfall days in January
Lewes, DE

Average rainfall days in January - Lewes, 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).

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Average snowfall in January
Lewes, DE

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

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

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Average snowfall days in January
Lewes, DE

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

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

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Average sea temperature in January
Lewes, DE

Average sea temperature in January - Lewes, DE
  • Average sea temperature in January: 42.4°F

The best month for swimming (with the highest average sea temperature) is August (76.9°F).
The coldest month (with the lowest average sea temperature) is February (40.7°F).

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Average daylight in January /
Average sunshine in January
Lewes, DE

Average daylight in January / Average sunshine in January - Lewes, DE
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 5h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

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Average sunshine days in January
Lewes, DE

Average sunshine days in January - Lewes, 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).

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Average UV index in January
Lewes, DE

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

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

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Average cloud cover in January
Lewes, DE

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

The 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).

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Average visibility in January
Lewes, DE

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

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

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Lewes, Delaware, USA

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