Fairfax, South Carolina · field elev 138 ft
Density Altitude at 7 Oaks Flight Park (7S1)
7 Oaks Flight Park sits at 138 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 2,253 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 | 45.9 | −687 ft | 58.5 | 156 ft |
| February | 48.8 | −491 ft | 61.8 | 372 ft |
| March | 55.1 | −69 ft | 68.8 | 826 ft |
| April | 62.5 | 418 ft | 76.4 | 1,310 ft |
| May | 70.4 | 928 ft | 83.2 | 1,736 ft |
| June | 77.3 | 1,367 ft | 88.6 | 2,070 ft |
| July | 80.5 | 1,568 ft | 91.6 | 2,253 ft |
| August | 79.0 | 1,474 ft | 89.3 | 2,113 ft |
| September | 73.9 | 1,152 ft | 84.9 | 1,842 ft |
| October | 64.5 | 548 ft | 77.4 | 1,373 ft |
| November | 54.4 | −116 ft | 68.6 | 813 ft |
| December | 47.9 | −551 ft | 60.8 | 307 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 7S1
DENSITY ALTITUDE
Field elevation 138 ft — the air behaves like 2,278 ft.
- PRESSURE ALT
- 139 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
- KAQX — Allendale County
Allendale · elev 162 ft
- 3J0 — Hampton County
Hampton · elev 112 ft
- KBNL — Barnwell Regional
Barnwell · elev 246 ft
- 99N — Bamberg County
Bamberg · elev 231 ft
- 1DS — Dry Swamp
Orangeburg · elev 180 ft
- KRBW — Lowcountry Regional
Walterboro · elev 101 ft
- 3J1 — Ridgeland-Claude Dean
Ridgeland · elev 85 ft
- KOGB — Orangeburg Municipal
Orangeburg · elev 195 ft
Frequently asked questions
How high does density altitude get at 7S1 in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at 7 Oaks Flight Park reaches roughly 2,253 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 7S1 on an average day?
It swings with the seasons: from roughly −687 ft at the coldest month's average temperature to about 1,568 ft at the warmest month's — all from a constant field elevation of 138 ft. The month-by-month table above carries the full year.
What is the field elevation of 7 Oaks Flight Park?
138 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7S1 (FAA), in Fairfax, South Carolina.