Knox, Indiana · field elev 685 ft
Density Altitude at Starke County (KOXI)
Starke County sits at 685 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,354 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 | 23.8 | −1,543 ft | 31.9 | −970 ft |
| February | 26.8 | −1,329 ft | 35.4 | −726 ft |
| March | 37.7 | −567 ft | 47.3 | 87 ft |
| April | 49.1 | 208 ft | 60.5 | 962 ft |
| May | 60.0 | 929 ft | 70.9 | 1,632 ft |
| June | 69.1 | 1,517 ft | 79.7 | 2,187 ft |
| July | 72.1 | 1,708 ft | 82.4 | 2,354 ft |
| August | 70.4 | 1,600 ft | 80.8 | 2,255 ft |
| September | 63.2 | 1,137 ft | 74.0 | 1,829 ft |
| October | 52.4 | 428 ft | 62.9 | 1,118 ft |
| November | 40.0 | −409 ft | 48.6 | 174 ft |
| December | 29.8 | −1,117 ft | 37.1 | −609 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 KOXI
DENSITY ALTITUDE
Field elevation 685 ft — the air behaves like 2,330 ft.
- PRESSURE ALT
- 686 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
- KRWN — Arens Field
Winamac · elev 708 ft
- KPPO — La Porte Municipal
La Porte · elev 812 ft
- C65 — Plymouth Municipal
Plymouth · elev 800 ft
- KVPZ — Porter County Regional
Valparaiso · elev 770 ft
- KMGC — Michigan City Municipal-Phillips Field
Michigan City · elev 655 ft
- KRCR — Fulton County
Rochester · elev 790 ft
- KSBN — South Bend International
South Bend · elev 798 ft
- C92 — Mentone
Mentone · elev 860 ft
Frequently asked questions
How high does density altitude get at KOXI in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Starke County reaches roughly 2,354 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 KOXI on an average day?
It swings with the seasons: from roughly −1,543 ft at the coldest month's average temperature to about 1,708 ft at the warmest month's — all from a constant field elevation of 685 ft. The month-by-month table above carries the full year.
What is the field elevation of Starke County?
685 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOXI (ICAO) / OXI (FAA), in Knox, Indiana.