Marlin, Texas · field elev 411 ft
Density Altitude at Marlin (T15)
Marlin sits at 411 ft, and even a typical August afternoon (96 °F) only lifts density altitude to about 2,822 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 | 46.3 | −321 ft | 59.1 | 532 ft |
| February | 50.2 | −58 ft | 63.0 | 787 ft |
| March | 56.9 | 387 ft | 69.3 | 1,193 ft |
| April | 64.5 | 884 ft | 76.9 | 1,676 ft |
| May | 72.2 | 1,378 ft | 83.4 | 2,082 ft |
| June | 79.5 | 1,839 ft | 90.6 | 2,525 ft |
| July | 82.9 | 2,051 ft | 94.5 | 2,762 ft |
| August | 83.1 | 2,063 ft | 95.5 | 2,822 ft |
| September | 76.9 | 1,676 ft | 89.8 | 2,476 ft |
| October | 67.3 | 1,065 ft | 80.6 | 1,908 ft |
| November | 55.8 | 315 ft | 69.4 | 1,200 ft |
| December | 47.9 | −213 ft | 60.8 | 643 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 T15
DENSITY ALTITUDE
Field elevation 411 ft — the air behaves like 2,852 ft.
- PRESSURE ALT
- 412 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
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Frequently asked questions
How high does density altitude get at T15 in summer?
On a typical August afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Marlin reaches roughly 2,822 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 T15 on an average day?
It swings with the seasons: from roughly −321 ft at the coldest month's average temperature to about 2,063 ft at the warmest month's — all from a constant field elevation of 411 ft. The month-by-month table above carries the full year.
What is the field elevation of Marlin?
411 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is T15 (FAA), in Marlin, Texas.