Nacogdoches, Texas · field elev 343 ft
Density Altitude at Nacogdoches A L Mangham Jr Regional (KOCH)
Nacogdoches A L Mangham Jr Regional sits at 343 ft, and even a typical August afternoon (93 °F) only lifts density altitude to about 2,606 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 | 47.1 | −351 ft | 57.7 | 356 ft |
| February | 51.0 | −89 ft | 62.3 | 658 ft |
| March | 57.6 | 350 ft | 69.3 | 1,110 ft |
| April | 64.8 | 820 ft | 76.3 | 1,555 ft |
| May | 73.1 | 1,352 ft | 82.8 | 1,962 ft |
| June | 80.2 | 1,800 ft | 89.0 | 2,344 ft |
| July | 83.2 | 1,986 ft | 92.6 | 2,564 ft |
| August | 83.2 | 1,986 ft | 93.3 | 2,606 ft |
| September | 77.4 | 1,624 ft | 87.8 | 2,270 ft |
| October | 66.9 | 956 ft | 78.2 | 1,674 ft |
| November | 56.3 | 264 ft | 67.8 | 1,014 ft |
| December | 48.5 | −257 ft | 59.5 | 474 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 KOCH
DENSITY ALTITUDE
Field elevation 343 ft — the air behaves like 2,588 ft.
- PRESSURE ALT
- 344 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 KOCH in summer?
On a typical August afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Nacogdoches A L Mangham Jr Regional reaches roughly 2,606 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 KOCH on an average day?
It swings with the seasons: from roughly −351 ft at the coldest month's average temperature to about 1,986 ft at the warmest month's — all from a constant field elevation of 343 ft. The month-by-month table above carries the full year.
What is the field elevation of Nacogdoches A L Mangham Jr Regional?
343 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOCH (ICAO) / OCH (FAA), in Nacogdoches, Texas.