Orangeburg, South Carolina · field elev 180 ft
Density Altitude at Dry Swamp (1DS)
Dry Swamp sits at 180 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 2,323 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 | 47.3 | −540 ft | 57.8 | 161 ft |
| February | 50.5 | −324 ft | 61.7 | 417 ft |
| March | 57.1 | 115 ft | 68.7 | 871 ft |
| April | 64.5 | 600 ft | 76.6 | 1,374 ft |
| May | 72.1 | 1,089 ft | 83.6 | 1,812 ft |
| June | 78.9 | 1,519 ft | 89.1 | 2,152 ft |
| July | 81.9 | 1,706 ft | 91.9 | 2,323 ft |
| August | 80.8 | 1,638 ft | 90.4 | 2,231 ft |
| September | 75.8 | 1,324 ft | 85.5 | 1,930 ft |
| October | 65.9 | 690 ft | 76.9 | 1,393 ft |
| November | 55.8 | 29 ft | 67.3 | 781 ft |
| December | 49.6 | −385 ft | 60.2 | 319 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 1DS
DENSITY ALTITUDE
Field elevation 180 ft — the air behaves like 2,329 ft.
- PRESSURE ALT
- 181 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
- KOGB — Orangeburg Municipal
Orangeburg · elev 195 ft
- 99N — Bamberg County
Bamberg · elev 231 ft
- 6J2 — St George
St George · elev 85 ft
- KBNL — Barnwell Regional
Barnwell · elev 246 ft
- 5J5 — Holly Hill
Holly Hill · elev 96 ft
- 7S1 — 7 Oaks Flight Park
Fairfax · elev 138 ft
- KAQX — Allendale County
Allendale · elev 162 ft
- 6J0 — Lexington County
Pelion · elev 452 ft
Frequently asked questions
How high does density altitude get at 1DS in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Dry Swamp reaches roughly 2,323 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 1DS on an average day?
It swings with the seasons: from roughly −540 ft at the coldest month's average temperature to about 1,706 ft at the warmest month's — all from a constant field elevation of 180 ft. The month-by-month table above carries the full year.
What is the field elevation of Dry Swamp?
180 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1DS (FAA), in Orangeburg, South Carolina.