Freer, Texas · field elev 564 ft
Density Altitude at Duval-Freer (T19)
Duval-Freer sits at 564 ft, and even a typical August afternoon (98 °F) only lifts density altitude to about 3,182 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 | 54.7 | 431 ft | 66.2 | 1,182 ft |
| February | 59.6 | 754 ft | 71.2 | 1,503 ft |
| March | 66.1 | 1,176 ft | 77.7 | 1,913 ft |
| April | 72.2 | 1,566 ft | 84.4 | 2,331 ft |
| May | 79.1 | 2,001 ft | 90.7 | 2,717 ft |
| June | 83.6 | 2,281 ft | 94.8 | 2,966 ft |
| July | 85.5 | 2,398 ft | 97.3 | 3,116 ft |
| August | 85.9 | 2,423 ft | 98.4 | 3,182 ft |
| September | 80.5 | 2,089 ft | 92.0 | 2,796 ft |
| October | 73.6 | 1,655 ft | 85.3 | 2,386 ft |
| November | 63.8 | 1,027 ft | 75.1 | 1,750 ft |
| December | 56.5 | 550 ft | 67.8 | 1,285 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 T19
DENSITY ALTITUDE
Field elevation 564 ft — the air behaves like 3,158 ft.
- PRESSURE ALT
- 565 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
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Kingsville · elev 130 ft
- 8T6 — Live Oak County
George West · elev 129 ft
- 67T — Old Hoppe Place
Agua Dulce · elev 96 ft
- KCOT — Cotulla-La Salle County
Cotulla · elev 474 ft
- 07R — Bishop-Windham
Bishop · elev 55 ft
- KBKS — Brooks County
Falfurrias · elev 112 ft
Frequently asked questions
How high does density altitude get at T19 in summer?
On a typical August afternoon — around 98 °F at the nearest NOAA normals station — density altitude at Duval-Freer reaches roughly 3,182 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 T19 on an average day?
It swings with the seasons: from roughly 431 ft at the coldest month's average temperature to about 2,423 ft at the warmest month's — all from a constant field elevation of 564 ft. The month-by-month table above carries the full year.
What is the field elevation of Duval-Freer?
564 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is T19 (FAA), in Freer, Texas.