San Antonio, Texas · field elev 809 ft
Density Altitude at San Antonio International (KSAT)
San Antonio International sits at 809 ft, and even a typical August afternoon (96 °F) only lifts density altitude to about 3,335 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 | 568 ft | 63.3 | 1,296 ft |
| February | 56.3 | 840 ft | 67.5 | 1,567 ft |
| March | 62.8 | 1,264 ft | 73.8 | 1,968 ft |
| April | 69.4 | 1,689 ft | 80.3 | 2,375 ft |
| May | 76.5 | 2,138 ft | 86.6 | 2,765 ft |
| June | 82.6 | 2,518 ft | 92.4 | 3,118 ft |
| July | 84.8 | 2,654 ft | 94.9 | 3,269 ft |
| August | 85.5 | 2,697 ft | 96.0 | 3,335 ft |
| September | 79.9 | 2,351 ft | 90.1 | 2,979 ft |
| October | 71.3 | 1,810 ft | 82.2 | 2,493 ft |
| November | 60.7 | 1,128 ft | 71.7 | 1,835 ft |
| December | 53.5 | 655 ft | 64.7 | 1,387 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 KSAT
DENSITY ALTITUDE
Field elevation 809 ft — the air behaves like 3,335 ft.
- PRESSURE ALT
- 810 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
- T94 — Twin-Oaks
San Antonio · elev 873 ft
- KSKF — Kelly Field
San Antonio · elev 691 ft
- KSSF — Stinson Municipal
San Antonio · elev 578 ft
- 1T8 — Bulverde Airpark
San Antonio · elev 1,088 ft
- 74R — Horizon
San Antonio · elev 551 ft
- 5C1 — Boerne Stage Airfield
San Antonio · elev 1,384 ft
- 1T7 — Kestrel Airpark
San Antonio · elev 1,261 ft
- 8T8 — San Geronimo Airpark
San Antonio · elev 1,040 ft
Frequently asked questions
How high does density altitude get at KSAT in summer?
On a typical August afternoon — around 96 °F at the nearest NOAA normals station — density altitude at San Antonio International reaches roughly 3,335 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 KSAT on an average day?
It swings with the seasons: from roughly 568 ft at the coldest month's average temperature to about 2,697 ft at the warmest month's — all from a constant field elevation of 809 ft. The month-by-month table above carries the full year.
What is the field elevation of San Antonio International?
809 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSAT (ICAO) / SAT (FAA), in San Antonio, Texas.