Olathe, Kansas · field elev 1,096 ft
Density Altitude at Johnson County Exec (KOJC)
Johnson County Exec sits at 1,096 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 3,169 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 | 30.0 | −590 ft | 38.7 | 13 ft |
| February | 34.5 | −276 ft | 43.8 | 361 ft |
| March | 45.1 | 448 ft | 55.1 | 1,115 ft |
| April | 54.8 | 1,095 ft | 64.9 | 1,753 ft |
| May | 64.6 | 1,734 ft | 73.9 | 2,326 ft |
| June | 74.0 | 2,332 ft | 83.2 | 2,905 ft |
| July | 78.2 | 2,595 ft | 87.5 | 3,169 ft |
| August | 77.0 | 2,520 ft | 86.7 | 3,120 ft |
| September | 68.4 | 1,977 ft | 78.1 | 2,589 ft |
| October | 56.7 | 1,220 ft | 66.5 | 1,856 ft |
| November | 44.0 | 374 ft | 53.1 | 983 ft |
| December | 33.8 | −325 ft | 42.2 | 252 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 KOJC
DENSITY ALTITUDE
Field elevation 1,096 ft — the air behaves like 3,200 ft.
- PRESSURE ALT
- 1,097 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 Kansas fields
- 63K — Hillside
Stilwell · elev 1,025 ft
- KIXD — New Century Aircenter
Olathe · elev 1,087 ft
- 51K — Cedar Air Park
Olathe · elev 1,024 ft
- K34 — Gardner Municipal
Gardner · elev 1,040 ft
- K81 — Miami County
Paola · elev 943 ft
- K64 — Vinland Valley Aerodrome
Baldwin City · elev 890 ft
- KLWC — Lawrence Regional
Lawrence · elev 833 ft
- KOWI — Ottawa Municipal
Ottawa · elev 966 ft
Frequently asked questions
How high does density altitude get at KOJC in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Johnson County Exec reaches roughly 3,169 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 KOJC on an average day?
It swings with the seasons: from roughly −590 ft at the coldest month's average temperature to about 2,595 ft at the warmest month's — all from a constant field elevation of 1,096 ft. The month-by-month table above carries the full year.
What is the field elevation of Johnson County Exec?
1,096 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOJC (ICAO) / OJC (FAA), in Olathe, Kansas.