Robbinsville, New Jersey · field elev 118 ft
Density Altitude at Trenton-Robbinsville (N87)
Trenton-Robbinsville sits at 118 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 1,928 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 | 31.0 | −1,742 ft | 40.5 | −1,081 ft |
| February | 32.8 | −1,616 ft | 43.0 | −909 ft |
| March | 40.3 | −1,094 ft | 50.9 | −374 ft |
| April | 51.0 | −367 ft | 62.9 | 419 ft |
| May | 60.6 | 269 ft | 72.8 | 1,057 ft |
| June | 69.8 | 865 ft | 81.7 | 1,618 ft |
| July | 74.9 | 1,191 ft | 86.7 | 1,928 ft |
| August | 72.9 | 1,064 ft | 84.9 | 1,817 ft |
| September | 66.1 | 627 ft | 78.3 | 1,405 ft |
| October | 54.3 | −147 ft | 66.4 | 646 ft |
| November | 44.2 | −827 ft | 55.3 | −81 ft |
| December | 36.1 | −1,385 ft | 45.5 | −739 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 N87
DENSITY ALTITUDE
Field elevation 118 ft — the air behaves like 1,947 ft.
- PRESSURE ALT
- 119 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
- KTTN — Trenton Mercer
Trenton · elev 213 ft
- 39N — Princeton
Princeton/Rocky Hill · elev 128 ft
- 2N6 — Redwing
Jobstown · elev 78 ft
- 3N6 — Old Bridge
Old Bridge · elev 87 ft
- 47N — Central Jersey Regional
Manville · elev 86 ft
- N14 — Flying W
Lumberton · elev 49 ft
- KVAY — South Jersey Regional
Mount Holly · elev 53 ft
- N12 — Lakewood
Lakewood · elev 42 ft
Frequently asked questions
How high does density altitude get at N87 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Trenton-Robbinsville reaches roughly 1,928 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 N87 on an average day?
It swings with the seasons: from roughly −1,742 ft at the coldest month's average temperature to about 1,191 ft at the warmest month's — all from a constant field elevation of 118 ft. The month-by-month table above carries the full year.
What is the field elevation of Trenton-Robbinsville?
118 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N87 (FAA), in Robbinsville, New Jersey.