Annual mean 20°C · wettest around August · prevailing wind SW
Warmest
31.4 °C
Coldest
12.8 °C
Wettest
43%
Windiest
4.2 m/s
Prevailing
SW
3.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Hilton Head Island over the whole year is 20°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 8°C. Hilton Head Island has no sharply defined rainy season: the chance of rain on a given day runs from 34% in February, the driest month, to 48% in August, the wettest. Winds in Hilton Head Island are highest in March, averaging 3.1 m/s (11 km/h), and lightest in July, at 2.2 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in Hilton Head Island come in April, when the sky is typically 31% covered; December is the cloudiest month, at 43%.
Month by month Hilton Head Island climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
13°C
8°C
11°C
35%
38%
2.7 m/s
29
3
59
February
17°C
11°C
15°C
34%
41%
2.8 m/s
51
10
66
March
19°C
13°C
18°C
35%
37%
3.1 m/s
61
15
65
April
23°C
16°C
22°C
35%
31%
2.9 m/s
70
34
49
May
27°C
20°C
28°C
38%
36%
2.7 m/s
42
58
18
June
30°C
24°C
32°C
44%
39%
2.5 m/s
11
49
3
July
31°C
25°C
35°C
46%
34%
2.2 m/s
2
27
0
August
30°C
25°C
34°C
48%
41%
2.2 m/s
5
31
0
September
28°C
23°C
31°C
40%
38%
2.5 m/s
20
54
7
October
25°C
18°C
25°C
42%
33%
2.6 m/s
55
48
32
November
19°C
12°C
18°C
41%
39%
2.7 m/s
57
17
64
December
15°C
10°C
13°C
44%
43%
2.7 m/s
42
6
64
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Hilton Head Island weather by season
Year round, Hilton Head Island has days of about 13°C at their warmest in January, its coolest month, and 31°C in July, its warmest; the coolest hours of the day run from 8°C to 25°C through the year, and the average temperature over the year is 20°C around the clock. Rain is most likely around August and least likely around February. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Hilton Head Island weather in winterDecember to February
High 15°CLow 9°CRain 37%
Winter in Hilton Head Island has typical daily highs of about 15°C and lows of about 9°C, with a 37% chance of rain on a given day.
Hilton Head Island weather in springMarch to May
High 23°CLow 16°CRain 36%
Spring in Hilton Head Island has typical daily highs of about 23°C and lows of about 16°C, with a 36% chance of rain on a given day.
Hilton Head Island weather in summerJune to August
High 30°CLow 25°CRain 46%
Summer in Hilton Head Island has typical daily highs of about 30°C and lows of about 25°C, with a 46% chance of rain on a given day.
Hilton Head Island weather in autumnSeptember to November
High 24°CLow 18°CRain 41%
Autumn in Hilton Head Island has typical daily highs of about 24°C and lows of about 18°C, with a 41% chance of rain on a given day.
When is the rainy season in Hilton Head Island?
Hilton Head Island has no sharply defined rainy season: the chance of rain on a given day runs from 34% in February, the driest month, to 48% in August, the wettest.
What time of year is Hilton Head Island windiest?
Winds in Hilton Head Island are highest in March, averaging 3.1 m/s (11 km/h), and lightest in July, at 2.2 m/s (8 km/h). The prevailing wind is from the SW.
What is the average temperature in Hilton Head Island year round?
The average temperature in Hilton Head Island over the whole year is 20°C. July is the hottest month, with highs of about 31°C; January is the coldest, with lows of about 8°C.