Hackettstown, New Jersey · field elev 670 ft
Density Altitude at Hackettstown (N05)
Hackettstown sits at 670 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,410 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 | 27.4 | −1,306 ft | 35.9 | −710 ft |
| February | 29.4 | −1,164 ft | 39.2 | −483 ft |
| March | 37.8 | −579 ft | 47.8 | 102 ft |
| April | 49.5 | 216 ft | 60.8 | 963 ft |
| May | 59.5 | 878 ft | 71.0 | 1,620 ft |
| June | 68.1 | 1,435 ft | 79.1 | 2,131 ft |
| July | 72.7 | 1,728 ft | 83.6 | 2,410 ft |
| August | 70.8 | 1,607 ft | 81.5 | 2,280 ft |
| September | 63.4 | 1,132 ft | 74.4 | 1,836 ft |
| October | 52.3 | 403 ft | 62.9 | 1,099 ft |
| November | 42.0 | −291 ft | 51.6 | 356 ft |
| December | 32.8 | −926 ft | 40.8 | −373 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 N05
DENSITY ALTITUDE
Field elevation 670 ft — the air behaves like 2,435 ft.
- PRESSURE ALT
- 671 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
- 1N7 — Blairstown
Blairstown · elev 372 ft
- 12N — Aeroflex/Andover
Andover · elev 583 ft
- KSMQ — Somerset
Somerville · elev 106 ft
- N51 — Solberg/Hunterdon
Readington · elev 190 ft
- N85 — Alexandria
Pittstown · elev 480 ft
- N40 — Sky Manor
Pittstown · elev 560 ft
- KMMU — Morristown Municipal
Morristown · elev 187 ft
- 47N — Central Jersey Regional
Manville · elev 86 ft
Frequently asked questions
How high does density altitude get at N05 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Hackettstown reaches roughly 2,410 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 N05 on an average day?
It swings with the seasons: from roughly −1,306 ft at the coldest month's average temperature to about 1,728 ft at the warmest month's — all from a constant field elevation of 670 ft. The month-by-month table above carries the full year.
What is the field elevation of Hackettstown?
670 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N05 (FAA), in Hackettstown, New Jersey.