Hilton Head Island, SC weather in July
In July, Hilton Head Island sees highs around 92°F and lows around 75°F: hot and oppressively humid, with frequent rain. Rain falls on about 13 days. It is one of the warmest months in Hilton Head Island. Plan outdoor time for mornings and evenings.
- Normal high
- 92°F
- Normal low
- 75°F
- Wet days
- 13
- 5.6 in total
- Muggy days
- 31
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 91°F | 92°F |
| Normal low | 74°F | 75°F |
| Chance of a wet day | 41% | 41% |
| Sunrise / sunset | 6:20 am / 8:33 pm | 6:37 am / 8:21 pm |
| Daylight | 14.2 h | 13.7 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical July day
- 6 am76°Fdew point 72°F
- 9 am83°Fdew point 73°F
- Noon89°Fdew point 73°F
- 3 pm89°Fdew point 73°F
- 6 pm85°Fdew point 74°F
- 9 pm80°Fdew point 74°F
NOAA hourly normals (local standard time) from Beaufort MCAS (19 mi away); average wind 6 mph; clear or few clouds in 30% of daytime hours, mostly cloudy or overcast in 46%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph15 of 31
- Hot dayshigh 90°F or more24 of 31
- Muggy daysdaily mean dew point 65°F or more31 of 31
- Wet daysat least 0.01 in of rain or melted snow13 of 31
- Notable rainat least 0.10 in8 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 5.6 in; a dry July brings about 4.0 in and a wet one about 7.0 in (25th and 75th percentiles). About 4 days bring half an inch or more, and about 2 an inch or more.
How July varies from year to year
- Warmest July, 1991-20201993: average high 98°F
- Coolest July2003: average high 89°F
- Wettest July1997: 11.7 in
- Driest July2012: 0.5 in
- Highest reading105°F (July 29, 1993)
- Lowest reading63°F (July 4, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 89°F | 92°F | 90°F |
| Normal low | 71°F | 75°F | 74°F |
| Wet days | 13 | 13 | 13 |
| Comfortable days | 0 | 0 | 0 |
| Daylight | 14.2 h | 14.0 h | 13.3 h |
Highs change by +3°F from June and -2°F into August.
How Hilton Head Island ranks in July
- Normal high106th warmest of 378 cities; 2nd of 5 in South Carolina
- Wet days329th driest of 378
- Comfortable days306th most of 340
What to pack for Hilton Head Island in July
- Light, breathable clothing – highs near 92°F and about 31 muggy days
- A rain jacket or umbrella – rain on about 13 days
- A swimsuit – about 15 beach days
- Sunglasses and sunscreen – about 14.0 hours of daylight and highs near 92°F
Heating and cooling
July has 0 heating degree days and 563 cooling degree days (base 65°F), 13% of the year's total heating and cooling demand.
Questions
How hot is Hilton Head Island in July?
The normal high is 92°F and the normal low is 75°F. From 1991 to 2020 the hottest July reading was 105°F (July 29, 1993).
Does it rain a lot in Hilton Head Island in July?
About 13 days in July have at least 0.01 in of precipitation, and the normal total is 5.6 in. The wettest July in 1991-2020 was in 1997 (11.7 in); the driest was in 2012 (0.5 in).
Is July a good time to visit Hilton Head Island?
July ranks 12th of 12 months on our comfort score for Hilton Head Island (36 out of 100). It has almost no comfortable days and about 24 days at 90°F or hotter. The best months are March and April.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Beaufort MCAS (USW00093831), 19 mi N of the city center, 37 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Beaufort MCAS (722085-93831), 19 mi N of the city center, 37 ft . Hourly observations, 1991-2020.
- Not available for this location: snowfall and snow depth (no station close enough or similar enough in elevation).