Spencerport, New York · field elev 614 ft
Density Altitude at Spencerport Airpark (D91)
Spencerport Airpark sits at 614 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,274 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 | 26.2 | −1,461 ft | 33.4 | −954 ft |
| February | 27.4 | −1,376 ft | 35.2 | −829 ft |
| March | 35.2 | −829 ft | 43.6 | −252 ft |
| April | 46.8 | −35 ft | 56.6 | 618 ft |
| May | 58.8 | 763 ft | 69.4 | 1,449 ft |
| June | 67.6 | 1,334 ft | 77.9 | 1,987 ft |
| July | 72.3 | 1,634 ft | 82.5 | 2,274 ft |
| August | 70.7 | 1,532 ft | 80.5 | 2,150 ft |
| September | 63.6 | 1,076 ft | 73.6 | 1,716 ft |
| October | 52.2 | 327 ft | 61.2 | 920 ft |
| November | 41.5 | −395 ft | 49.1 | 120 ft |
| December | 32.0 | −1,052 ft | 38.5 | −601 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 D91
DENSITY ALTITUDE
Field elevation 614 ft — the air behaves like 2,305 ft.
- PRESSURE ALT
- 615 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 York fields
- 7G0 — Ledgedale Airpark
Brockport · elev 665 ft
- KROC — Frederick Douglass/Greater Rochester International
Rochester · elev 559 ft
- 5G0 — Le Roy
Le Roy · elev 780 ft
- KGVQ — Genesee County
Batavia · elev 914 ft
- 9G6 — Pine Hill
Albion · elev 669 ft
- D52 — Geneseo
Geneseo · elev 560 ft
- KIUA — Canandaigua
Canandaigua · elev 814 ft
- 01G — Perry-Warsaw
Perry · elev 1,558 ft
Frequently asked questions
How high does density altitude get at D91 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Spencerport Airpark reaches roughly 2,274 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 D91 on an average day?
It swings with the seasons: from roughly −1,461 ft at the coldest month's average temperature to about 1,634 ft at the warmest month's — all from a constant field elevation of 614 ft. The month-by-month table above carries the full year.
What is the field elevation of Spencerport Airpark?
614 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is D91 (FAA), in Spencerport, New York.