Marion, Kentucky · field elev 653 ft
Density Altitude at Marion-Crittenden County James C Johnson Regional (KGDA)
Marion-Crittenden County James C Johnson Regional sits at 653 ft, and even a typical August afternoon (90 °F) only lifts density altitude to about 2,801 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 | 38.8 | −531 ft | 47.7 | 74 ft |
| February | 42.8 | −258 ft | 52.0 | 362 ft |
| March | 51.6 | 335 ft | 61.7 | 1,000 ft |
| April | 61.0 | 955 ft | 72.0 | 1,663 ft |
| May | 69.3 | 1,491 ft | 79.3 | 2,122 ft |
| June | 77.1 | 1,985 ft | 86.8 | 2,587 ft |
| July | 80.4 | 2,191 ft | 90.1 | 2,789 ft |
| August | 80.1 | 2,172 ft | 90.3 | 2,801 ft |
| September | 73.6 | 1,764 ft | 84.8 | 2,464 ft |
| October | 62.8 | 1,072 ft | 73.9 | 1,783 ft |
| November | 51.3 | 315 ft | 61.1 | 961 ft |
| December | 42.4 | −285 ft | 50.6 | 269 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 KGDA
DENSITY ALTITUDE
Field elevation 653 ft — the air behaves like 2,783 ft.
- PRESSURE ALT
- 654 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 Kentucky fields
- KTWT — Sturgis Municipal
Sturgis · elev 372 ft
- 2M0 — Princeton-Caldwell County
Princeton · elev 584 ft
- M34 — Kentucky Dam State Park
Calvert City · elev 351 ft
- 8M7 — Tradewater
Dawson Springs · elev 405 ft
- 1M9 — Lake Barkley State Park
Cadiz · elev 571 ft
- 2I0 — Madisonville Regional
Madisonville · elev 439 ft
- KEHR — Henderson City-County
Henderson · elev 387 ft
- KPAH — Barkley Regional
Paducah · elev 410 ft
Frequently asked questions
How high does density altitude get at KGDA in summer?
On a typical August afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Marion-Crittenden County James C Johnson Regional reaches roughly 2,801 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 KGDA on an average day?
It swings with the seasons: from roughly −531 ft at the coldest month's average temperature to about 2,191 ft at the warmest month's — all from a constant field elevation of 653 ft. The month-by-month table above carries the full year.
What is the field elevation of Marion-Crittenden County James C Johnson Regional?
653 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGDA (ICAO) / GDA (FAA), in Marion, Kentucky.