Lebanon, Ohio · field elev 898 ft
Density Altitude at Warren County/John Lane Field (I68)
Warren County/John Lane Field sits at 898 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,830 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 | 30.6 | −795 ft | 39.1 | −206 ft |
| February | 33.8 | −572 ft | 43.0 | 60 ft |
| March | 42.6 | 33 ft | 52.6 | 705 ft |
| April | 53.9 | 791 ft | 65.2 | 1,529 ft |
| May | 64.0 | 1,451 ft | 74.8 | 2,140 ft |
| June | 72.2 | 1,976 ft | 82.8 | 2,639 ft |
| July | 75.4 | 2,178 ft | 85.9 | 2,830 ft |
| August | 74.2 | 2,102 ft | 85.1 | 2,781 ft |
| September | 67.4 | 1,670 ft | 78.8 | 2,391 ft |
| October | 55.8 | 917 ft | 66.8 | 1,631 ft |
| November | 44.3 | 149 ft | 53.8 | 784 ft |
| December | 35.1 | −482 ft | 42.9 | 54 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 I68
DENSITY ALTITUDE
Field elevation 898 ft — the air behaves like 2,836 ft.
- PRESSURE ALT
- 899 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 Ohio fields
- 40I — Red Stewart Airfield
Waynesville · elev 955 ft
- KMGY — Dayton/Wright Brothers
Dayton · elev 957 ft
- KMWO — Middletown Regional/Hook Field
Middletown · elev 651 ft
- I73 — Moraine Air Park
Dayton · elev 720 ft
- KHAO — Butler County Regional/Hogan Field
Hamilton · elev 632 ft
- I66 — Clinton Field
Wilmington · elev 1,033 ft
- KGDK — Greene County/Lewis A Jackson Regional
Dayton · elev 949 ft
- I44 — Dahio Trotwood
Dayton · elev 925 ft
Frequently asked questions
How high does density altitude get at I68 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Warren County/John Lane Field reaches roughly 2,830 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 I68 on an average day?
It swings with the seasons: from roughly −795 ft at the coldest month's average temperature to about 2,178 ft at the warmest month's — all from a constant field elevation of 898 ft. The month-by-month table above carries the full year.
What is the field elevation of Warren County/John Lane Field?
898 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is I68 (FAA), in Lebanon, Ohio.