Toms River, New Jersey · field elev 86 ft
Density Altitude at Ocean County (KMJX)
Ocean County 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 | 31.6 | −1,740 ft | 41.6 | −1,045 ft |
| February | 33.2 | −1,628 ft | 44.5 | −847 ft |
| March | 39.7 | −1,176 ft | 51.0 | −407 ft |
| April | 50.0 | −474 ft | 61.7 | 302 ft |
| May | 60.1 | 197 ft | 71.3 | 922 ft |
| June | 68.9 | 768 ft | 79.8 | 1,460 ft |
| July | 74.8 | 1,145 ft | 85.5 | 1,815 ft |
| August | 73.0 | 1,031 ft | 83.7 | 1,704 ft |
| September | 65.4 | 542 ft | 77.4 | 1,309 ft |
| October | 54.2 | −193 ft | 66.7 | 627 ft |
| November | 44.1 | −874 ft | 55.9 | −80 ft |
| December | 36.7 | −1,383 ft | 46.8 | −690 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 KMJX
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
- N12 — Lakewood
Lakewood · elev 42 ft
- 31E — Eagles Nest
West Creek · elev 39 ft
- KBLM — Monmouth Exec
Belmar/Farmingdale · elev 153 ft
- 2N6 — Redwing
Jobstown · elev 78 ft
- N87 — Trenton-Robbinsville
Robbinsville · elev 118 ft
- N14 — Flying W
Lumberton · elev 49 ft
- 3N6 — Old Bridge
Old Bridge · elev 87 ft
- KVAY — South Jersey Regional
Mount Holly · elev 53 ft
Frequently asked questions
How high does density altitude get at KMJX in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Ocean County 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 KMJX on an average day?
It swings with the seasons: from roughly −1,740 ft at the coldest month's average temperature to about 1,145 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 Ocean County?
86 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KMJX (ICAO) / MJX (FAA), in Toms River, New Jersey.