Seminole, Texas · field elev 3,315 ft
Density Altitude at Gaines County (KGNC)
From a field elevation of 3,315 ft, a typical July afternoon at Gaines County (94 °F) raises density altitude to about 6,253 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 42.1 | 2,997 ft | 56.2 | 3,921 ft |
| February | 46.0 | 3,256 ft | 61.2 | 4,242 ft |
| March | 53.4 | 3,740 ft | 69.1 | 4,740 ft |
| April | 61.4 | 4,254 ft | 77.8 | 5,278 ft ▲ |
| May | 70.5 | 4,827 ft | 85.8 | 5,764 ft ▲ |
| June | 78.6 | 5,327 ft | 93.2 | 6,205 ft ▲ |
| July | 80.6 | 5,449 ft | 94.0 | 6,253 ft ▲ |
| August | 79.6 | 5,388 ft | 93.1 | 6,199 ft ▲ |
| September | 72.4 | 4,945 ft | 85.6 | 5,752 ft ▲ |
| October | 62.5 | 4,324 ft | 77.1 | 5,235 ft ▲ |
| November | 50.5 | 3,552 ft | 64.9 | 4,476 ft |
| December | 42.6 | 3,031 ft | 56.7 | 3,954 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 KGNC
DENSITY ALTITUDE caution
Field elevation 3,315 ft — the air behaves like 6,253 ft.
- PRESSURE ALT
- 3,317 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 Texas fields
- E57 — Denver City
Denver City · elev 3,575 ft
- E11 — Andrews County
Andrews · elev 3,174 ft
- F98 — Yoakum County
Plains · elev 3,705 ft
- KLUV — Lamesa Municipal
Lamesa · elev 2,999 ft
- KBFE — Terry County
Brownfield · elev 3,265 ft
- KODO — Odessa-Schlemeyer Field
Odessa · elev 3,004 ft
- KMDD — Midland Airpark
Midland · elev 2,805 ft
- KMAF — Midland International Air And Space Port
Midland · elev 2,872 ft
Frequently asked questions
How high does density altitude get at KGNC in summer?
On a typical July afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Gaines County reaches roughly 6,253 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 KGNC on an average day?
It swings with the seasons: from roughly 2,997 ft at the coldest month's average temperature to about 5,449 ft at the warmest month's — all from a constant field elevation of 3,315 ft. The month-by-month table above carries the full year.
What is the field elevation of Gaines County?
3,315 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGNC (ICAO) / GNC (FAA), in Seminole, Texas.