Winnsboro, South Carolina · field elev 578 ft
Density Altitude at Fairfield County (KFDW)
Fairfield County sits at 578 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 2,758 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 | 42.0 | −405 ft | 53.1 | 342 ft |
| February | 45.2 | −188 ft | 57.1 | 607 ft |
| March | 52.3 | 289 ft | 65.0 | 1,122 ft |
| April | 61.1 | 869 ft | 74.0 | 1,697 ft |
| May | 69.0 | 1,379 ft | 81.1 | 2,143 ft |
| June | 76.4 | 1,849 ft | 87.6 | 2,545 ft |
| July | 80.0 | 2,074 ft | 91.1 | 2,758 ft |
| August | 78.3 | 1,968 ft | 88.8 | 2,618 ft |
| September | 72.5 | 1,602 ft | 83.3 | 2,280 ft |
| October | 61.8 | 915 ft | 73.6 | 1,672 ft |
| November | 51.2 | 216 ft | 63.4 | 1,019 ft |
| December | 44.5 | −235 ft | 55.4 | 495 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 KFDW
DENSITY ALTITUDE
Field elevation 578 ft — the air behaves like 2,752 ft.
- PRESSURE ALT
- 579 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
- KCUB — Jim Hamilton L B Owens
Columbia · elev 193 ft
- KCAE — Columbia Metro
Columbia · elev 236 ft
- KEOE — Newberry County
Newberry · elev 570 ft
- KCDN — Woodward Field
Camden · elev 303 ft
- KLKR — Lancaster County-Mc Whirter Field
Lancaster · elev 486 ft
- KDCM — Chester Catawba Regional
Chester · elev 657 ft
- T73 — Kirk Air Base
Lancaster · elev 578 ft
- 6J0 — Lexington County
Pelion · elev 452 ft
Frequently asked questions
How high does density altitude get at KFDW in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Fairfield County reaches roughly 2,758 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 KFDW on an average day?
It swings with the seasons: from roughly −405 ft at the coldest month's average temperature to about 2,074 ft at the warmest month's — all from a constant field elevation of 578 ft. The month-by-month table above carries the full year.
What is the field elevation of Fairfield County?
578 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KFDW (ICAO) / FDW (FAA), in Winnsboro, South Carolina.