Summerville, South Carolina · field elev 56 ft
Density Altitude at Summerville (KDYB)
Summerville sits at 56 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 2,062 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 | 46.4 | −755 ft | 58.2 | 35 ft |
| February | 49.4 | −552 ft | 61.9 | 278 ft |
| March | 55.4 | −151 ft | 68.5 | 706 ft |
| April | 62.6 | 323 ft | 75.6 | 1,159 ft |
| May | 70.7 | 847 ft | 82.3 | 1,580 ft |
| June | 77.2 | 1,260 ft | 87.2 | 1,884 ft |
| July | 80.5 | 1,467 ft | 90.1 | 2,062 ft |
| August | 80.1 | 1,442 ft | 89.7 | 2,037 ft |
| September | 74.8 | 1,108 ft | 84.7 | 1,729 ft |
| October | 64.8 | 467 ft | 76.6 | 1,222 ft |
| November | 54.9 | −184 ft | 67.7 | 654 ft |
| December | 49.3 | −559 ft | 61.3 | 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 KDYB
DENSITY ALTITUDE
Field elevation 56 ft — the air behaves like 2,056 ft.
- PRESSURE ALT
- 57 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
- 6J2 — St George
St George · elev 85 ft
- KMKS — Berkeley County
Moncks Corner · elev 74 ft
- 5J5 — Holly Hill
Holly Hill · elev 96 ft
- KCHS — Charleston AFB/International
Charleston · elev 46 ft
- KRBW — Lowcountry Regional
Walterboro · elev 101 ft
- KJZI — Charleston Exec
Charleston · elev 19 ft
- KLRO — Mt Pleasant Regional-Faison Field
Mount Pleasant · elev 12 ft
- KMNI — Santee Cooper Regional
Manning · elev 103 ft
Frequently asked questions
How high does density altitude get at KDYB in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Summerville reaches roughly 2,062 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 KDYB on an average day?
It swings with the seasons: from roughly −755 ft at the coldest month's average temperature to about 1,467 ft at the warmest month's — all from a constant field elevation of 56 ft. The month-by-month table above carries the full year.
What is the field elevation of Summerville?
56 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KDYB (ICAO) / DYB (FAA), in Summerville, South Carolina.