Boonville, Indiana · field elev 395 ft
Density Altitude at Boonville (I91)
Boonville sits at 395 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,383 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 | 33.8 | −1,200 ft | 42.1 | −626 ft |
| February | 38.0 | −908 ft | 47.4 | −266 ft |
| March | 47.0 | −293 ft | 57.7 | 420 ft |
| April | 58.0 | 440 ft | 69.9 | 1,212 ft |
| May | 67.3 | 1,045 ft | 78.5 | 1,757 ft |
| June | 75.4 | 1,562 ft | 86.3 | 2,242 ft |
| July | 78.3 | 1,744 ft | 88.6 | 2,383 ft |
| August | 76.7 | 1,644 ft | 87.5 | 2,315 ft |
| September | 70.0 | 1,219 ft | 81.7 | 1,957 ft |
| October | 58.6 | 480 ft | 70.3 | 1,238 ft |
| November | 46.6 | −320 ft | 56.7 | 354 ft |
| December | 37.5 | −943 ft | 45.8 | −374 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 I91
DENSITY ALTITUDE
Field elevation 395 ft — the air behaves like 2,407 ft.
- PRESSURE ALT
- 396 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
- KEVV — Evansville Regional
Evansville · elev 422 ft
- 3EV — Skylane
Evansville · elev 380 ft
- KHNB — Huntingburg
Huntingburg · elev 529 ft
- KTEL — Perry County Municipal
Tell City · elev 660 ft
- KDCY — Daviess County
Washington · elev 472 ft
- KFRH — French Lick Municipal
French Lick · elev 792 ft
- I20 — Ed-Air
Oaktown · elev 426 ft
- I42 — Paoli Municipal
Paoli · elev 816 ft
Frequently asked questions
How high does density altitude get at I91 in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Boonville reaches roughly 2,383 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 I91 on an average day?
It swings with the seasons: from roughly −1,200 ft at the coldest month's average temperature to about 1,744 ft at the warmest month's — all from a constant field elevation of 395 ft. The month-by-month table above carries the full year.
What is the field elevation of Boonville?
395 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is I91 (FAA), in Boonville, Indiana.