Erwinna, Pennsylvania · field elev 390 ft
Density Altitude at Vansant (9N1)
Vansant sits at 390 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 2,137 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 | −1,543 ft | 38.5 | −880 ft |
| February | 30.9 | −1,409 ft | 41.3 | −687 ft |
| March | 38.8 | −859 ft | 49.5 | −131 ft |
| April | 50.5 | −64 ft | 62.5 | 728 ft |
| May | 60.5 | 598 ft | 72.1 | 1,346 ft |
| June | 69.2 | 1,161 ft | 80.2 | 1,857 ft |
| July | 73.9 | 1,461 ft | 84.7 | 2,137 ft |
| August | 71.9 | 1,334 ft | 82.3 | 1,988 ft |
| September | 64.8 | 878 ft | 75.7 | 1,575 ft |
| October | 53.2 | 116 ft | 64.7 | 871 ft |
| November | 42.7 | −591 ft | 53.9 | 163 ft |
| December | 34.1 | −1,185 ft | 43.2 | −557 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 9N1
DENSITY ALTITUDE
Field elevation 390 ft — the air behaves like 2,155 ft.
- PRESSURE ALT
- 391 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 Pennsylvania fields
- KDYL — Doylestown
Doylestown · elev 394 ft
- KCKZ — Pennridge
Perkasie · elev 568 ft
- KUKT — Quakertown
Quakertown · elev 525 ft
- N43 — Braden Airpark
Easton · elev 397 ft
- KXLL — Allentown Queen City Municipal
Allentown · elev 399 ft
- KABE — Lehigh Valley International
Allentown · elev 394 ft
- 7N8 — Butter Valley Golf Port
Bally · elev 500 ft
- KLOM — Wings Field
Philadelphia · elev 302 ft
Frequently asked questions
How high does density altitude get at 9N1 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Vansant reaches roughly 2,137 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 9N1 on an average day?
It swings with the seasons: from roughly −1,543 ft at the coldest month's average temperature to about 1,461 ft at the warmest month's — all from a constant field elevation of 390 ft. The month-by-month table above carries the full year.
What is the field elevation of Vansant?
390 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 9N1 (FAA), in Erwinna, Pennsylvania.