Pittstown, New Jersey · field elev 480 ft
Density Altitude at Alexandria (N85)
Alexandria sits at 480 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,321 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 | 29.2 | −1,416 ft | 37.8 | −816 ft |
| February | 31.3 | −1,268 ft | 40.9 | −603 ft |
| March | 39.3 | −712 ft | 49.6 | −13 ft |
| April | 50.6 | 54 ft | 62.5 | 839 ft |
| May | 60.5 | 709 ft | 72.4 | 1,476 ft |
| June | 69.5 | 1,291 ft | 80.9 | 2,011 ft |
| July | 74.6 | 1,615 ft | 85.9 | 2,321 ft |
| August | 72.7 | 1,495 ft | 84.1 | 2,209 ft |
| September | 65.7 | 1,047 ft | 77.4 | 1,792 ft |
| October | 53.6 | 254 ft | 65.0 | 1,001 ft |
| November | 43.2 | −445 ft | 53.3 | 234 ft |
| December | 34.5 | −1,045 ft | 42.8 | −473 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 N85
DENSITY ALTITUDE
Field elevation 480 ft — the air behaves like 2,327 ft.
- PRESSURE ALT
- 481 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
- N40 — Sky Manor
Pittstown · elev 560 ft
- N51 — Solberg/Hunterdon
Readington · elev 190 ft
- N05 — Hackettstown
Hackettstown · elev 670 ft
- KSMQ — Somerset
Somerville · elev 106 ft
- 47N — Central Jersey Regional
Manville · elev 86 ft
- 39N — Princeton
Princeton/Rocky Hill · elev 128 ft
- KTTN — Trenton Mercer
Trenton · elev 213 ft
- 1N7 — Blairstown
Blairstown · elev 372 ft
Frequently asked questions
How high does density altitude get at N85 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Alexandria reaches roughly 2,321 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 N85 on an average day?
It swings with the seasons: from roughly −1,416 ft at the coldest month's average temperature to about 1,615 ft at the warmest month's — all from a constant field elevation of 480 ft. The month-by-month table above carries the full year.
What is the field elevation of Alexandria?
480 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N85 (FAA), in Pittstown, New Jersey.