Hilton Head Island Weather in January

January brings the most severe of winter weather to Hilton Head Island, South Carolina. This is the coldest and cloudiest month of the year. Winter's rainfall also peaks this month. Despite that, most days have mild temperatures and dry weather.

This page gives detailed information on the typical January weather for Hilton Head Island. The temperature and rainfall numbers here are historical averages based on climate data gathered at Hilton Head Island. The humidity and sunshine measurements are averages from the Savannah / Hilton Head International Airport.

Temperature

60 °F	January average high	16 °C
40 °F	January average low	4 °C

In most years, Hilton Head Island averages a daily maximum temperature for January that's between 57 and 64 degrees Fahrenheit (14 to 18 degrees Celsius). The minimum temperature usually falls between 36 and 43 °F (2 to 6 °C).

January is the coldest month overall for Hilton Head Island and the 1st to 6th are its chilliest days. These days, along with the last few in December, have daily highs averaging 59.7 °F (15.4 °C). The coldest nights of the year occur from January 12th to 21st when the low averages 39.5 °F (4.2 °C).

17 days	60 °F max. or more (16 °C)
16 days	40 °F min. or less (4 °C)

The temperature rises nearly every day during January to over 50 °F (10 °C) at Hilton Head. The Island averages 3 days in January when the thermometer reaches into the 70s °F (over 21 °C). This time of year, a temperature of 80 °F (27 °C) or above occurs about once a decade .

The thermometer dips to 32 °F (0 °C) or below on 7 nights. Although uncommon, January can get as cold as 10 °F (-12 °C).

Rain

4.0 in	total precipitation	101 mm
10 days	of rain

January rainfall varies a lot from year to year. Half the time, Hilton Head Island receives 1.6 to 6 inches (39 to 156 mm) total rain for the month. One in four years has drier weather, while another one in four is wetter.

Sun

54 %	sunshine
9 days	clear skies

This is the cloudiest month of the year at Hilton Head Island. The sun's rays reach the ground in the island town during 54 percent of daylight hours on average in January, for a total of 173 hours in the month. Typically on 9 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in January at Hilton Head Island lasts for 10 hours and 19 minutes a day on average. The shortest day of the month is the 1st with 10 hours and 5 minutes of daylight. By the end of the month, the days have lengthened to 10:39 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humidity

70 %	January average humidity

The relative humidity in Hilton Head Island during January usually peaks at 82 percent in the morning then drops to 52 percent by late afternoon.

Local Time	1 am	4 am	7 am	10 am	1 pm	4 pm	7 pm	10 pm
Humidity %	78	80	82	70	54	52	66	75

Storms

3 days

rainfall of 0.5 inches (13 mm) or more

Heavy rainstorms are more common in January than in previous months.