San Antonio, Texas · field elev 873 ft
Density Altitude at Twin-Oaks (T94)
Twin-Oaks sits at 873 ft, and even a typical August afternoon (96 °F) only lifts density altitude to about 3,413 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 | 52.2 | 647 ft | 63.3 | 1,375 ft |
| February | 56.3 | 919 ft | 67.5 | 1,646 ft |
| March | 62.8 | 1,343 ft | 73.8 | 2,046 ft |
| April | 69.4 | 1,767 ft | 80.3 | 2,454 ft |
| May | 76.5 | 2,216 ft | 86.6 | 2,843 ft |
| June | 82.6 | 2,596 ft | 92.4 | 3,196 ft |
| July | 84.8 | 2,732 ft | 94.9 | 3,347 ft |
| August | 85.5 | 2,775 ft | 96.0 | 3,413 ft |
| September | 79.9 | 2,429 ft | 90.1 | 3,056 ft |
| October | 71.3 | 1,888 ft | 82.2 | 2,572 ft |
| November | 60.7 | 1,206 ft | 71.7 | 1,913 ft |
| December | 53.5 | 734 ft | 64.7 | 1,466 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 T94
DENSITY ALTITUDE
Field elevation 873 ft — the air behaves like 3,413 ft.
- PRESSURE ALT
- 874 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
- KSAT — San Antonio International
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- 1T8 — Bulverde Airpark
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- KSKF — Kelly Field
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- KSSF — Stinson Municipal
San Antonio · elev 578 ft
- 1T7 — Kestrel Airpark
San Antonio · elev 1,261 ft
- 5C1 — Boerne Stage Airfield
San Antonio · elev 1,384 ft
- 74R — Horizon
San Antonio · elev 551 ft
- 8T8 — San Geronimo Airpark
San Antonio · elev 1,040 ft
Frequently asked questions
How high does density altitude get at T94 in summer?
On a typical August afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Twin-Oaks reaches roughly 3,413 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 T94 on an average day?
It swings with the seasons: from roughly 647 ft at the coldest month's average temperature to about 2,775 ft at the warmest month's — all from a constant field elevation of 873 ft. The month-by-month table above carries the full year.
What is the field elevation of Twin-Oaks?
873 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is T94 (FAA), in San Antonio, Texas.