Oaktown, Indiana · field elev 426 ft
Density Altitude at Ed-Air (I20)
Ed-Air sits at 426 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,359 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 | 31.1 | −1,350 ft | 39.4 | −773 ft |
| February | 35.4 | −1,049 ft | 44.2 | −444 ft |
| March | 44.8 | −404 ft | 55.1 | 287 ft |
| April | 56.1 | 353 ft | 67.3 | 1,083 ft |
| May | 66.4 | 1,025 ft | 76.8 | 1,688 ft |
| June | 74.7 | 1,555 ft | 85.3 | 2,218 ft |
| July | 77.4 | 1,726 ft | 87.6 | 2,359 ft |
| August | 76.0 | 1,638 ft | 86.8 | 2,310 ft |
| September | 69.2 | 1,205 ft | 81.6 | 1,988 ft |
| October | 57.6 | 452 ft | 69.4 | 1,218 ft |
| November | 44.8 | −404 ft | 54.6 | 254 ft |
| December | 35.4 | −1,049 ft | 43.4 | −499 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 I20
DENSITY ALTITUDE
Field elevation 426 ft — the air behaves like 2,384 ft.
- PRESSURE ALT
- 427 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
- KSIV — Sullivan County
Sullivan · elev 539 ft
- KDCY — Daviess County
Washington · elev 472 ft
- 1I3 — Shawnee Field
Bloomfield · elev 501 ft
- KHUF — Terre Haute Regional
Terre Haute · elev 589 ft
- 0I2 — Brazil Clay County/Charles B Hall Field
Brazil · elev 645 ft
- 3I3 — Sky King
Terre Haute · elev 496 ft
- KHNB — Huntingburg
Huntingburg · elev 529 ft
- KBMG — Monroe County
Bloomington · elev 846 ft
Frequently asked questions
How high does density altitude get at I20 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Ed-Air reaches roughly 2,359 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 I20 on an average day?
It swings with the seasons: from roughly −1,350 ft at the coldest month's average temperature to about 1,726 ft at the warmest month's — all from a constant field elevation of 426 ft. The month-by-month table above carries the full year.
What is the field elevation of Ed-Air?
426 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is I20 (FAA), in Oaktown, Indiana.