Hilton Head Island (SC) Temperatures: Monthly Averages and Year-Round Insights

On this page, we’ll explore Hilton Head Island’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.

Monthly Temperature Averages

Visitors to Hilton Head Island will encounter a climate influenced by big temperature differences across the year. Average maximum daytime temperatures reach a very warm 32°C in July. In January, the coolest month of the year, temperatures drop to a moderate 15°C. At night, minimum temperatures can drop even lower, averaging around 5°C.

The chart below illustrates the average maximum day and minimum night temperatures in Hilton Head Island by month:

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM. During this time the sun's heating effect is the strongest.

The chart below shows the average temperature throughout the year:

July, the city’s warmest month, also receives about 121 mm of rainfall spread over roughly 13 days. For more information, please visit our Hilton Head Island Precipitation page.

Annual Temperatures in the United States of America Compared

The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.

Annual

Annual

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

Hilton Head Island Temperatures Compared World Wide

Hilton Head Island’s average annual maximum temperature is 24°C. Let’s compare this with some popular tourist destinations:

Seville, Spain, stands out with its warm Mediterranean climate and an average annual temperature of 23°C.

In Toronto, Canada, the average annual temperature is 13°C, with snowy winters and warm summers.

Meanwhile, New York City, USA, experiences a more pronounced seasonal variation with an average annual temperature of 17°C.

In Brisbane, Australia, the average annual temperature is 26°C, making it warmer than Sydney.

How are these Temperatures Measured?

Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.

This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.

Sea vs. Land Temperatures

The influence of nearby oceans or large water bodies significantly affects local temperatures:

Ocean Influence: Coastal regions tend to have more stable temperatures, as large bodies of water absorb and release heat slowly. This often results in milder winters and cooler summers compared to inland areas.
Continental Climates: Landmasses well away from large bodies of water tend to show greater extremes in temperature, having hotter summers and colder winters because of the absence of water as a moderating influence.

For more detailed information about Hilton Head Island’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Hilton Head Island climate page.