Fort Hood (Killeen), Texas · field elev 1,015 ft
Density Altitude at Robert Gray Aaf (KGRK)
Robert Gray Aaf sits at 1,015 ft, and even a typical August afternoon (97 °F) only lifts density altitude to about 3,621 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 | 47.8 | 530 ft | 59.5 | 1,303 ft |
| February | 51.5 | 777 ft | 63.1 | 1,537 ft |
| March | 58.5 | 1,238 ft | 69.8 | 1,967 ft |
| April | 65.3 | 1,679 ft | 77.0 | 2,421 ft |
| May | 73.4 | 2,195 ft | 83.8 | 2,844 ft |
| June | 81.0 | 2,671 ft | 92.2 | 3,356 ft |
| July | 84.0 | 2,856 ft | 95.7 | 3,567 ft |
| August | 84.6 | 2,893 ft | 96.6 | 3,621 ft |
| September | 78.2 | 2,496 ft | 89.6 | 3,199 ft |
| October | 68.0 | 1,852 ft | 79.7 | 2,590 ft |
| November | 57.6 | 1,179 ft | 69.4 | 1,941 ft |
| December | 49.3 | 630 ft | 60.4 | 1,362 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 KGRK
DENSITY ALTITUDE
Field elevation 1,015 ft — the air behaves like 3,645 ft.
- PRESSURE ALT
- 1,016 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
- KILE — Skylark Field
Killeen · elev 848 ft
- 2TX — Salado
Salado · elev 689 ft
- KLZZ — Lampasas
Lampasas · elev 1,214 ft
- KGOP — Gatesville Municipal
Gatesville · elev 905 ft
- KTPL — Draughon-Miller Central Texas Regional
Temple · elev 682 ft
- KGTU — Georgetown Exec
Georgetown · elev 790 ft
- KBMQ — Burnet Municipal/Kate Craddock Field
Burnet · elev 1,283 ft
- KRYW — Lago Vista Tx/Rusty Allen
Lago Vista · elev 1,230 ft
Frequently asked questions
How high does density altitude get at KGRK in summer?
On a typical August afternoon — around 97 °F at the nearest NOAA normals station — density altitude at Robert Gray Aaf reaches roughly 3,621 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 KGRK on an average day?
It swings with the seasons: from roughly 530 ft at the coldest month's average temperature to about 2,893 ft at the warmest month's — all from a constant field elevation of 1,015 ft. The month-by-month table above carries the full year.
What is the field elevation of Robert Gray Aaf?
1,015 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGRK (ICAO) / GRK (FAA), in Fort Hood (Killeen), Texas.