Greenville, South Carolina · field elev 956 ft
Density Altitude at Donaldson Field (KGYH)
Donaldson Field sits at 956 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,950 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 | 40.7 | −24 ft | 51.5 | 704 ft |
| February | 44.1 | 207 ft | 55.7 | 982 ft |
| March | 51.1 | 677 ft | 63.5 | 1,490 ft |
| April | 59.6 | 1,237 ft | 72.0 | 2,034 ft |
| May | 66.9 | 1,709 ft | 77.5 | 2,380 ft |
| June | 74.3 | 2,180 ft | 83.8 | 2,772 ft |
| July | 77.5 | 2,380 ft | 86.7 | 2,950 ft |
| August | 76.7 | 2,330 ft | 85.7 | 2,889 ft |
| September | 70.9 | 1,964 ft | 79.8 | 2,524 ft |
| October | 59.9 | 1,257 ft | 70.3 | 1,926 ft |
| November | 50.2 | 617 ft | 61.3 | 1,348 ft |
| December | 43.4 | 160 ft | 53.8 | 856 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 KGYH
DENSITY ALTITUDE
Field elevation 956 ft — the air behaves like 2,968 ft.
- PRESSURE ALT
- 957 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
- KGMU — Greenville Downtown
Greenville · elev 1,048 ft
- KGSP — Greenville Spartanburg International
Greer · elev 964 ft
- KLQK — Pickens County
Pickens · elev 1,013 ft
- KAND — Anderson Regional
Anderson · elev 782 ft
- KSPA — Spartanburg Downtown Meml/Simpson Field
Spartanburg · elev 802 ft
- KCEU — Oconee County Regional
Clemson · elev 891 ft
- KLUX — Laurens County
Laurens · elev 698 ft
- 33A — Fairview
Landrum · elev 1,046 ft
Frequently asked questions
How high does density altitude get at KGYH in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Donaldson Field reaches roughly 2,950 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 KGYH on an average day?
It swings with the seasons: from roughly −24 ft at the coldest month's average temperature to about 2,380 ft at the warmest month's — all from a constant field elevation of 956 ft. The month-by-month table above carries the full year.
What is the field elevation of Donaldson Field?
956 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGYH (ICAO) / GYH (FAA), in Greenville, South Carolina.