Indianapolis, Indiana · field elev 861 ft
Density Altitude at Post-Air (7L8)
Post-Air sits at 861 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,650 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 | 26.6 | −1,123 ft | 34.2 | −590 ft |
| February | 30.4 | −855 ft | 39.1 | −252 ft |
| March | 40.1 | −183 ft | 49.7 | 466 ft |
| April | 51.6 | 593 ft | 61.9 | 1,270 ft |
| May | 62.3 | 1,296 ft | 72.3 | 1,937 ft |
| June | 71.2 | 1,867 ft | 80.9 | 2,476 ft |
| July | 74.0 | 2,044 ft | 83.7 | 2,650 ft |
| August | 72.6 | 1,956 ft | 82.6 | 2,582 ft |
| September | 65.9 | 1,528 ft | 76.8 | 2,220 ft |
| October | 54.1 | 759 ft | 64.6 | 1,444 ft |
| November | 41.7 | −74 ft | 50.6 | 526 ft |
| December | 31.7 | −764 ft | 39.2 | −245 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 7L8
DENSITY ALTITUDE
Field elevation 861 ft — the air behaves like 2,668 ft.
- PRESSURE ALT
- 862 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 Indiana fields
- KMQJ — Indianapolis Regional
Indianapolis · elev 862 ft
- KHFY — Indy South Greenwood
Indianapolis · elev 822 ft
- KUMP — Indianapolis Metro
Indianapolis · elev 811 ft
- KGFD — Pope Field
Greenfield · elev 895 ft
- KIND — Indianapolis International
Indianapolis · elev 796 ft
- KEYE — Eagle Creek Airpark
Indianapolis · elev 823 ft
- KGEZ — Shelbyville Municipal
Shelbyville · elev 803 ft
- I80 — Noblesville
Noblesville · elev 830 ft
Frequently asked questions
How high does density altitude get at 7L8 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Post-Air reaches roughly 2,650 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 7L8 on an average day?
It swings with the seasons: from roughly −1,123 ft at the coldest month's average temperature to about 2,044 ft at the warmest month's — all from a constant field elevation of 861 ft. The month-by-month table above carries the full year.
What is the field elevation of Post-Air?
861 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7L8 (FAA), in Indianapolis, Indiana.