Sherman, New York · field elev 1,640 ft
Density Altitude at Pratt'S Eastern Divide (D88)
Pratt'S Eastern Divide sits at 1,640 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 3,372 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 | 24.3 | −310 ft | 32.3 | 250 ft |
| February | 24.8 | −275 ft | 34.5 | 402 ft |
| March | 33.1 | 305 ft | 43.2 | 995 ft |
| April | 45.1 | 1,123 ft | 56.4 | 1,872 ft |
| May | 56.4 | 1,872 ft | 68.2 | 2,632 ft |
| June | 65.0 | 2,428 ft | 75.9 | 3,117 ft |
| July | 69.2 | 2,695 ft | 80.0 | 3,372 ft |
| August | 67.6 | 2,594 ft | 78.7 | 3,291 ft |
| September | 61.0 | 2,171 ft | 72.7 | 2,916 ft |
| October | 49.7 | 1,430 ft | 61.0 | 2,171 ft |
| November | 39.5 | 744 ft | 48.3 | 1,337 ft |
| December | 29.9 | 83 ft | 37.3 | 594 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 D88
DENSITY ALTITUDE
Field elevation 1,640 ft — the air behaves like 3,372 ft.
- PRESSURE ALT
- 1,641 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
- D79 — Dart
Mayville · elev 1,330 ft
- KJHW — Chautauqua County/Jamestown
Jamestown · elev 1,723 ft
- KDKK — Chautauqua County/Dunkirk
Dunkirk · elev 692 ft
- D59 — Gowanda
Gowanda · elev 830 ft
- N56 — Great Valley
Great Valley · elev 1,450 ft
- 4G2 — Hamburg
Hamburg · elev 751 ft
- 8G3 — Giermek Exec
Olean · elev 1,420 ft
- KOLE — Cattaraugus County-Olean
Olean · elev 2,135 ft
Frequently asked questions
How high does density altitude get at D88 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Pratt'S Eastern Divide reaches roughly 3,372 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 D88 on an average day?
It swings with the seasons: from roughly −310 ft at the coldest month's average temperature to about 2,695 ft at the warmest month's — all from a constant field elevation of 1,640 ft. The month-by-month table above carries the full year.
What is the field elevation of Pratt'S Eastern Divide?
1,640 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is D88 (FAA), in Sherman, New York.