Rockdale, Texas · field elev 474 ft
Density Altitude at H H Coffield Regional (KRCK)
H H Coffield Regional sits at 474 ft, and even a typical August afternoon (96 °F) only lifts density altitude to about 2,929 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 | 49.9 | −0 ft | 61.1 | 741 ft |
| February | 53.6 | 247 ft | 64.6 | 968 ft |
| March | 60.6 | 708 ft | 71.6 | 1,418 ft |
| April | 67.4 | 1,149 ft | 78.6 | 1,860 ft |
| May | 75.2 | 1,646 ft | 85.2 | 2,270 ft |
| June | 81.7 | 2,053 ft | 91.7 | 2,668 ft |
| July | 84.3 | 2,215 ft | 94.8 | 2,856 ft |
| August | 84.7 | 2,239 ft | 96.0 | 2,929 ft |
| September | 79.1 | 1,891 ft | 90.3 | 2,583 ft |
| October | 69.6 | 1,290 ft | 81.7 | 2,053 ft |
| November | 59.2 | 616 ft | 70.6 | 1,354 ft |
| December | 51.6 | 114 ft | 63.0 | 864 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 KRCK
DENSITY ALTITUDE
Field elevation 474 ft — the air behaves like 2,929 ft.
- PRESSURE ALT
- 475 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
- T35 — Cameron Municipal Airpark
Cameron · elev 402 ft
- KRWV — Caldwell Municipal
Caldwell · elev 391 ft
- T74 — Taylor Municipal
Taylor · elev 600 ft
- KLHB — Hearne Municipal
Hearne · elev 285 ft
- KGYB — Giddings-Lee County
Giddings · elev 484 ft
- KCLL — Easterwood Field
College Station · elev 321 ft
- KEDC — Austin Exec
Austin · elev 620 ft
- 2TX — Salado
Salado · elev 689 ft
Frequently asked questions
How high does density altitude get at KRCK in summer?
On a typical August afternoon — around 96 °F at the nearest NOAA normals station — density altitude at H H Coffield Regional reaches roughly 2,929 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 KRCK on an average day?
It swings with the seasons: from roughly −0 ft at the coldest month's average temperature to about 2,239 ft at the warmest month's — all from a constant field elevation of 474 ft. The month-by-month table above carries the full year.
What is the field elevation of H H Coffield Regional?
474 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRCK (ICAO) / RCK (FAA), in Rockdale, Texas.