January weather forecastHilton Head Island, SC

Tall iconic lighthouse seen in a great night view over downtown Hilton Head Island, South Carolina

January

Weather in January

January in Hilton Head Island is renowned for its mild winters. These months typically see a mix of clear and partially cloudy skies, with temperatures suiting light to medium-weight clothing. The month witnesses an interesting blend of rain and humidity, enhancing the overall awe-inspiring ambiance of the place. As compared with December, the weather tends to be slightly cooler but less rainy making it ideal for outdoor exploration. January's highest recorded temperature from the data is 57.4°F (14.1°C), with the lowest average being 46°F (7.8°C).

Temperature

In Hilton Head Island, South Carolina, the lowest average temperatures are observed in January, with a high of 57.4°F (14.1°C) and a low of 46°F (7.8°C).

Humidity

The least humid month is January, with an average relative humidity of 72%.

Rainfall

January is the month with the least rainfall. Rain falls for 8.3 days and accumulates 1.02" (26mm) of precipitation.

Snowfall

January is the only month when snow falls. January is the month with the most snowfall. Snow falls for 0.1 days and accumulates 0.04" (1mm) of snow.

Ocean temperature

In Hilton Head Island, in January, the average water temperature is 57.9°F (14.4°C).
Note: Dipping into 57.9°F (14.4°C) below 50°F (10°C) is possible with the right protection; absent that, anticipate cold shock and hampered breathing. Swimming momentarily at 55.4°F (13°C) can be jarring.

Daylight

In January, the average length of the day is 10h and 19min.
On the first day of the month, sunrise is at 7:23 am and sunset at 5:28 pm. On the last day of January, in Hilton Head Island, sunrise is at 7:17 am and sunset at 5:55 pm EST.

Sunshine

The average sunshine in January is 5.8h.

UV index

With an average maximum UV index of 3, January is the month with the lowest UV index in Hilton Head Island. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A daily maximum UV index of 3 in January translates into the following instructions:
Guard yourself - An obligation to protect skin and eyes from harm exists. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.

Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

January is the coldest month in Hilton Head Island, exhibiting average temperatures of 57.4°F (14.1°C) at the peak and 46°F (7.8°C) at the base.

The average high-temperature and low-temperature in Hilton Head Island during January are 57.4°F (14.1°C) and 46°F (7.8°C) respectively.

With an average relative humidity of 72%, January is the least humid month in Hilton Head Island, South Carolina.

In January, the average relative humidity in Hilton Head Island is 72%.

The month with the least rainfall in Hilton Head Island is January, when the rain falls for 8.3 days and typically collects 1.02" (26mm) of precipitation.

In Hilton Head Island, during January, the rain falls for 8.3 days and regularly aggregates up to 1.02" (26mm) of precipitation.

January is the month with the most snowfall in Hilton Head Island. Snow falls for 0.1 days and accumulates 0.04" (1mm) of snow.

January is the first month it typically snows. Throughout January, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow.

In January, the average ocean temperature is 57.9°F (14.4°C). Swimming in 57.9°F (14.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

In January, the average day length in Hilton Head Island is 10h and 19min.

On the first day of January in Hilton Head Island, South Carolina, sunrise is at 7:23 am and sunset at 5:28 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 5:55 pm EST.

The average sunshine duration in January is 5.8h.

With an average maximum UV index of 3, January is the month with the lowest UV index.

In January, the average daily maximum UV index in Hilton Head Island is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

61.5°F

57.4°F

60.4°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.1mph

10.2mph

10.1mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.1

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

17.2

20.3

15.8

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Hilton Head Island, SC

Average high temperature in January: 57.4°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.4°F).

Average low temperature in January: 46°F

The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (46°F).

Average pressure in January
Hilton Head Island, SC

Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).

Average wind speed in January
Hilton Head Island, SC

Average wind speed in January: 9.6mph

The windiest months (with the highest average wind speed) are January, March and April (9.6mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

Average humidity in January
Hilton Head Island, SC

Average humidity in January: 72%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is January (72%).

Average rainfall in January
Hilton Head Island, SC

Average rainfall in January: 1.02"

The wettest month (with the highest rainfall) is August (6.06").
The driest month (with the least rainfall) is January (1.02").

Average rainfall days in January
Hilton Head Island, SC

Average rainfall days in January: 8.3 days

The month with the highest number of rainy days is August (25 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in January
Hilton Head Island, SC

Average snowfall in January: 0.04"

The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in January
Hilton Head Island, SC

Average snowfall days in January: 0.1 days

The months with the highest number of snowfall days are January and February (0.1 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

Average sea temperature in January
Hilton Head Island, SC

Average sea temperature in January: 57.9°F

The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (57.5°F).

Average daylight in January /
Average sunshine in January
Hilton Head Island, SC

Average daylight in January: 10h and 18min

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).

Average sunshine in January: 5h and 48min

The months with the most sunshine are June and July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).

Average sunshine days in January
Hilton Head Island, SC

Average sunshine days in January: 20.3 days

The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (2.8 days).

Average UV index in January
Hilton Head Island, SC

Average UV index in January: 3

The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).

Average cloud cover in January
Hilton Head Island, SC

Average cloud cover in January: 33

The months with the most cloud cover are February and December (Cloud cover 38).
The months with the least cloud cover are June and July (Cloud cover 25).

Average visibility in January
Hilton Head Island, SC

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).