Hilton Head Island, South Carolina · field elev 19 ft
Density Altitude at Hilton Head (KHXD)
Hilton Head sits at 19 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 2,078 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 51.0 | −490 ft | 60.8 | 160 ft |
| February | 54.1 | −283 ft | 64.5 | 401 ft |
| March | 60.4 | 134 ft | 71.5 | 853 ft |
| April | 66.9 | 557 ft | 77.4 | 1,227 ft |
| May | 74.6 | 1,050 ft | 83.6 | 1,616 ft |
| June | 80.3 | 1,410 ft | 88.7 | 1,931 ft |
| July | 83.0 | 1,578 ft | 91.1 | 2,078 ft |
| August | 82.4 | 1,541 ft | 90.3 | 2,029 ft |
| September | 77.8 | 1,253 ft | 85.9 | 1,758 ft |
| October | 69.8 | 744 ft | 78.9 | 1,322 ft |
| November | 60.4 | 134 ft | 70.1 | 763 ft |
| December | 53.0 | −356 ft | 62.0 | 238 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for KHXD
DENSITY ALTITUDE
Field elevation 19 ft — the air behaves like 2,072 ft.
- PRESSURE ALT
- 20 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby South Carolina fields
- KARW — Beaufort Exec
Beaufort · elev 9 ft
- 3J1 — Ridgeland-Claude Dean
Ridgeland · elev 85 ft
- KRBW — Lowcountry Regional
Walterboro · elev 101 ft
- 3J0 — Hampton County
Hampton · elev 112 ft
- KJZI — Charleston Exec
Charleston · elev 19 ft
- KCHS — Charleston AFB/International
Charleston · elev 46 ft
- 7S1 — 7 Oaks Flight Park
Fairfax · elev 138 ft
- KDYB — Summerville
Summerville · elev 56 ft
Frequently asked questions
How high does density altitude get at KHXD in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Hilton Head reaches roughly 2,078 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at KHXD on an average day?
It swings with the seasons: from roughly −490 ft at the coldest month's average temperature to about 1,578 ft at the warmest month's — all from a constant field elevation of 19 ft. The month-by-month table above carries the full year.
What is the field elevation of Hilton Head?
19 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHXD (ICAO) / HXD (FAA), in Hilton Head Island, South Carolina.