Manville, New Jersey · field elev 86 ft
Density Altitude at Central Jersey Regional (47N)
Central Jersey Regional sits at 86 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 1,815 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 | 29.0 | −1,923 ft | 38.7 | −1,245 ft |
| February | 30.4 | −1,825 ft | 41.3 | −1,066 ft |
| March | 38.4 | −1,265 ft | 49.5 | −508 ft |
| April | 49.2 | −528 ft | 62.1 | 328 ft |
| May | 58.9 | 118 ft | 71.7 | 948 ft |
| June | 68.4 | 736 ft | 80.5 | 1,504 ft |
| July | 73.7 | 1,075 ft | 85.5 | 1,815 ft |
| August | 71.7 | 948 ft | 83.4 | 1,685 ft |
| September | 65.0 | 516 ft | 76.7 | 1,265 ft |
| October | 52.7 | −293 ft | 64.4 | 477 ft |
| November | 42.3 | −997 ft | 53.5 | −240 ft |
| December | 33.9 | −1,579 ft | 43.3 | −929 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 47N
DENSITY ALTITUDE
Field elevation 86 ft — the air behaves like 1,846 ft.
- PRESSURE ALT
- 87 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
- KSMQ — Somerset
Somerville · elev 106 ft
- N51 — Solberg/Hunterdon
Readington · elev 190 ft
- 39N — Princeton
Princeton/Rocky Hill · elev 128 ft
- 3N6 — Old Bridge
Old Bridge · elev 87 ft
- KLDJ — Linden
Linden · elev 22 ft
- N40 — Sky Manor
Pittstown · elev 560 ft
- KTTN — Trenton Mercer
Trenton · elev 213 ft
- KMMU — Morristown Municipal
Morristown · elev 187 ft
Frequently asked questions
How high does density altitude get at 47N in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Central Jersey Regional reaches roughly 1,815 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 47N on an average day?
It swings with the seasons: from roughly −1,923 ft at the coldest month's average temperature to about 1,075 ft at the warmest month's — all from a constant field elevation of 86 ft. The month-by-month table above carries the full year.
What is the field elevation of Central Jersey Regional?
86 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 47N (FAA), in Manville, New Jersey.