Temperatures in September
It's hot in September in Hilton Head Island with an average temperature of 30°C. Temperatures this month range from a low of 28°C to a high of 32°C. At night, you can expect temperatures between 20°C and 24°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Hilton Head Island in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Hilton Head Island with hot temperatures, averaging around 32°C during the day and nights close to 24°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-September
By mid-September, the average daytime temperature drops to around 30°C, with nights close to 23°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Hilton Head Island will be around 29°C, with nights close to 22°C. A shower might show up, but overall the weather will be dry and sunny.
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Precipitation in September
In September, there is an average of 107 mm of precipitation, spread over 10 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
The average precipitation chance is 35% per day this month. The weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Hilton Head Island. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Hilton Head Island in September |
London | ||
|---|---|---|---|
 Average Temperature |
30°C | 20°C | |
 High Temp |
32°C | 22°C | |
| Low Temp |
28°C | 17°C | |
 Total Precipitation |
107 mm | 44 mm | |
| Rainy Days |
10 days | 8 days | |
August
UV index
The UV index is a maximum of 5 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Hilton Head Island?
After some sun? Then September isn’t the best time to be in Hilton Head Island. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Hilton Head Island in September
With 36°C, Hilton Head Island hit the highest temperature in the last 10 years in September 2020. The lowest daytime temperature in this month was 17°C in 2022. The extreme night temperatures ranged from a low of 13°C to a high of 27°C.
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Daily Temperature in September in Hilton Head Island
This chart shows the average daily temperatures, both day and night, for each day in September in Hilton Head Island, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Hilton Head Island
The chart below shows the average daily precipitation in September for Hilton Head Island, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 10 days of rain in Hilton Head Island.
Daily UV Index in September in Hilton Head Island
This chart shows the average daily UV index in September in Hilton Head Island, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Hilton Head Island Over the Years
This chart shows the average temperature in September in Hilton Head Island, measured in degrees Celsius, over the past years.
Total Precipitation in September in Hilton Head Island Over the Years
This chart shows the average precipitation in September in Hilton Head Island, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Hilton Head Island
Click on a specific day in September for detailed info on the typical weather on that day in Hilton Head Island. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Hilton Head Island
Have you been to Hilton Head Island in September?
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Average Weather in Hilton Head Island by Month
Click on a month below to see detailed weather info for Hilton Head Island. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Hilton Head Island for all months at once
