Angleton, Texas · field elev 30 ft
Density Altitude at Flyin Tiger (81D)
Flyin Tiger sits at 30 ft, and even a typical August afternoon (92 °F) only lifts density altitude to about 2,122 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 | 55.6 | −170 ft | 64.3 | 402 ft |
| February | 59.2 | 68 ft | 67.5 | 609 ft |
| March | 64.1 | 389 ft | 71.8 | 885 ft |
| April | 69.3 | 725 ft | 76.9 | 1,209 ft |
| May | 76.7 | 1,197 ft | 83.6 | 1,629 ft |
| June | 81.7 | 1,511 ft | 88.6 | 1,938 ft |
| July | 83.6 | 1,629 ft | 91.0 | 2,085 ft |
| August | 83.9 | 1,648 ft | 91.6 | 2,122 ft |
| September | 80.8 | 1,454 ft | 88.3 | 1,920 ft |
| October | 73.0 | 962 ft | 81.9 | 1,523 ft |
| November | 64.2 | 395 ft | 73.1 | 968 ft |
| December | 58.6 | 29 ft | 67.2 | 590 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 81D
DENSITY ALTITUDE
Field elevation 30 ft — the air behaves like 2,146 ft.
- PRESSURE ALT
- 31 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
- KLBX — Texas Gulf Coast Regional
Angleton/Lake Jackson · elev 25 ft
- 6R5 — Alvin Airpark
Alvin · elev 43 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
- KHOU — William P Hobby
Houston · elev 46 ft
Frequently asked questions
How high does density altitude get at 81D in summer?
On a typical August afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Flyin Tiger reaches roughly 2,122 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 81D on an average day?
It swings with the seasons: from roughly −170 ft at the coldest month's average temperature to about 1,648 ft at the warmest month's — all from a constant field elevation of 30 ft. The month-by-month table above carries the full year.
What is the field elevation of Flyin Tiger?
30 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 81D (FAA), in Angleton, Texas.