Angleton/Lake Jackson, Texas · field elev 25 ft
Density Altitude at Texas Gulf Coast Regional (KLBX)
Texas Gulf Coast Regional sits at 25 ft, and even a typical August afternoon (93 °F) only lifts density altitude to about 2,213 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 | 55.1 | −209 ft | 65.3 | 461 ft |
| February | 58.7 | 29 ft | 68.5 | 668 ft |
| March | 64.2 | 389 ft | 73.9 | 1,013 ft |
| April | 69.8 | 751 ft | 79.4 | 1,361 ft |
| May | 77.1 | 1,216 ft | 85.9 | 1,766 ft |
| June | 82.1 | 1,529 ft | 90.9 | 2,073 ft |
| July | 83.8 | 1,635 ft | 92.8 | 2,189 ft |
| August | 83.9 | 1,642 ft | 93.2 | 2,213 ft |
| September | 80.1 | 1,404 ft | 89.4 | 1,981 ft |
| October | 72.7 | 937 ft | 83.5 | 1,617 ft |
| November | 63.4 | 337 ft | 74.2 | 1,032 ft |
| December | 57.0 | −83 ft | 67.4 | 597 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 KLBX
DENSITY ALTITUDE
Field elevation 25 ft — the air behaves like 2,201 ft.
- PRESSURE ALT
- 26 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
- 7R9 — Bailes
Angleton · elev 21 ft
- 81D — Flyin Tiger
Angleton · elev 30 ft
- 6R5 — Alvin Airpark
Alvin · elev 43 ft
- KBYY — Bay City Regional
Bay City · elev 45 ft
- 3T2 — Wolfe Air Park
Manvel · elev 55 ft
- KAXH — Houston/Southwest
Houston · elev 69 ft
- KLVJ — Pearland Regional
Houston · elev 44 ft
- T79 — Skyway Manor
Pearland · elev 55 ft
Frequently asked questions
How high does density altitude get at KLBX in summer?
On a typical August afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Texas Gulf Coast Regional reaches roughly 2,213 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 KLBX on an average day?
It swings with the seasons: from roughly −209 ft at the coldest month's average temperature to about 1,642 ft at the warmest month's — all from a constant field elevation of 25 ft. The month-by-month table above carries the full year.
What is the field elevation of Texas Gulf Coast Regional?
25 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLBX (ICAO) / LBX (FAA), in Angleton/Lake Jackson, Texas.