Trenton, New Jersey · field elev 213 ft
Density Altitude at Trenton Mercer (KTTN)
Trenton Mercer sits at 213 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,001 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 | 32.0 | −1,553 ft | 39.7 | −1,017 ft |
| February | 34.3 | −1,392 ft | 42.8 | −805 ft |
| March | 41.7 | −880 ft | 50.8 | −263 ft |
| April | 52.5 | −149 ft | 62.9 | 536 ft |
| May | 62.0 | 478 ft | 72.4 | 1,148 ft |
| June | 71.0 | 1,059 ft | 81.0 | 1,691 ft |
| July | 76.3 | 1,396 ft | 86.0 | 2,001 ft |
| August | 74.4 | 1,275 ft | 84.0 | 1,877 ft |
| September | 67.4 | 828 ft | 77.1 | 1,446 ft |
| October | 55.7 | 63 ft | 65.5 | 705 ft |
| November | 45.4 | −628 ft | 54.5 | −16 ft |
| December | 36.8 | −1,218 ft | 44.4 | −696 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 KTTN
DENSITY ALTITUDE
Field elevation 213 ft — the air behaves like 2,001 ft.
- PRESSURE ALT
- 214 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 New Jersey fields
- 39N — Princeton
Princeton/Rocky Hill · elev 128 ft
- N87 — Trenton-Robbinsville
Robbinsville · elev 118 ft
- 2N6 — Redwing
Jobstown · elev 78 ft
- 47N — Central Jersey Regional
Manville · elev 86 ft
- N51 — Solberg/Hunterdon
Readington · elev 190 ft
- N40 — Sky Manor
Pittstown · elev 560 ft
- KVAY — South Jersey Regional
Mount Holly · elev 53 ft
- N14 — Flying W
Lumberton · elev 49 ft
Frequently asked questions
How high does density altitude get at KTTN in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Trenton Mercer reaches roughly 2,001 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 KTTN on an average day?
It swings with the seasons: from roughly −1,553 ft at the coldest month's average temperature to about 1,396 ft at the warmest month's — all from a constant field elevation of 213 ft. The month-by-month table above carries the full year.
What is the field elevation of Trenton Mercer?
213 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KTTN (ICAO) / TTN (FAA), in Trenton, New Jersey.