Sonora, Texas · field elev 2,339 ft
Density Altitude at Rocking L (11T)
Rocking L sits at 2,339 ft, and even a typical August afternoon (91 °F) only lifts density altitude to about 4,910 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 | 47.8 | 2,169 ft | 58.5 | 2,869 ft |
| February | 51.7 | 2,426 ft | 62.5 | 3,126 ft |
| March | 58.1 | 2,843 ft | 69.5 | 3,571 ft |
| April | 65.3 | 3,305 ft | 76.9 | 4,033 ft |
| May | 72.2 | 3,740 ft | 82.8 | 4,396 ft |
| June | 77.9 | 4,095 ft | 88.3 | 4,729 ft |
| July | 80.1 | 4,230 ft | 90.8 | 4,880 ft |
| August | 80.5 | 4,255 ft | 91.3 | 4,910 ft |
| September | 74.9 | 3,909 ft | 84.9 | 4,524 ft |
| October | 66.5 | 3,381 ft | 76.7 | 4,020 ft |
| November | 56.0 | 2,707 ft | 66.0 | 3,350 ft |
| December | 48.9 | 2,242 ft | 59.3 | 2,921 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 11T
DENSITY ALTITUDE
Field elevation 2,339 ft — the air behaves like 4,892 ft.
- PRESSURE ALT
- 2,340 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
- KJCT — Kimble County
Junction · elev 1,754 ft
- KECU — Edwards County
Rocksprings · elev 2,372 ft
- KSOA — Sonora Municipal
Sonora · elev 2,140 ft
- 27R — Eldorado
Eldorado · elev 2,448 ft
- T50 — Menard County
Menard · elev 1,933 ft
- 49R — Real County
Leakey · elev 1,640 ft
- 10X — Ox Ranch
Uvalde · elev 1,305 ft
- T92 — Mason County
Mason · elev 1,514 ft
Frequently asked questions
How high does density altitude get at 11T in summer?
On a typical August afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Rocking L reaches roughly 4,910 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 11T on an average day?
It swings with the seasons: from roughly 2,169 ft at the coldest month's average temperature to about 4,255 ft at the warmest month's — all from a constant field elevation of 2,339 ft. The month-by-month table above carries the full year.
What is the field elevation of Rocking L?
2,339 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 11T (FAA), in Sonora, Texas.