San Antonio, Texas · field elev 1,384 ft
Density Altitude at Boerne Stage Airfield (5C1)
Boerne Stage Airfield sits at 1,384 ft, and even a typical August afternoon (94 °F) only lifts density altitude to about 3,919 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 | 49.0 | 1,067 ft | 61.5 | 1,888 ft |
| February | 53.0 | 1,332 ft | 65.5 | 2,145 ft |
| March | 59.6 | 1,765 ft | 72.1 | 2,565 ft |
| April | 66.3 | 2,197 ft | 78.8 | 2,985 ft |
| May | 73.3 | 2,641 ft | 84.0 | 3,306 ft |
| June | 79.4 | 3,022 ft | 89.8 | 3,660 ft |
| July | 81.8 | 3,170 ft | 92.5 | 3,823 ft |
| August | 82.3 | 3,201 ft | 94.1 | 3,919 ft |
| September | 76.8 | 2,860 ft | 88.5 | 3,581 ft |
| October | 68.0 | 2,305 ft | 80.5 | 3,090 ft |
| November | 57.7 | 1,641 ft | 70.0 | 2,432 ft |
| December | 50.3 | 1,153 ft | 62.7 | 1,965 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 5C1
DENSITY ALTITUDE
Field elevation 1,384 ft — the air behaves like 3,913 ft.
- PRESSURE ALT
- 1,385 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
- 1T8 — Bulverde Airpark
San Antonio · elev 1,088 ft
- 8T8 — San Geronimo Airpark
San Antonio · elev 1,040 ft
- T94 — Twin-Oaks
San Antonio · elev 873 ft
- 1T7 — Kestrel Airpark
San Antonio · elev 1,261 ft
- KSAT — San Antonio International
San Antonio · elev 809 ft
- KSKF — Kelly Field
San Antonio · elev 691 ft
- KCVB — Castroville Municipal
Castroville · elev 774 ft
- KERV — Kerrville Municipal/Louis Schreiner Field
Kerrville · elev 1,617 ft
Frequently asked questions
How high does density altitude get at 5C1 in summer?
On a typical August afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Boerne Stage Airfield reaches roughly 3,919 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 5C1 on an average day?
It swings with the seasons: from roughly 1,067 ft at the coldest month's average temperature to about 3,201 ft at the warmest month's — all from a constant field elevation of 1,384 ft. The month-by-month table above carries the full year.
What is the field elevation of Boerne Stage Airfield?
1,384 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5C1 (FAA), in San Antonio, Texas.