Adel, Georgia · field elev 235 ft
Density Altitude at Cook County (15J)
Cook County sits at 235 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 2,286 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 | 49.9 | −296 ft | 60.6 | 413 ft |
| February | 53.6 | −49 ft | 64.4 | 661 ft |
| March | 59.3 | 328 ft | 70.7 | 1,067 ft |
| April | 65.5 | 732 ft | 77.2 | 1,479 ft |
| May | 73.1 | 1,220 ft | 84.2 | 1,917 ft |
| June | 78.9 | 1,586 ft | 88.6 | 2,188 ft |
| July | 80.8 | 1,705 ft | 90.2 | 2,286 ft |
| August | 80.3 | 1,674 ft | 89.2 | 2,225 ft |
| September | 76.3 | 1,423 ft | 85.6 | 2,003 ft |
| October | 67.6 | 868 ft | 78.0 | 1,530 ft |
| November | 58.0 | 243 ft | 68.9 | 951 ft |
| December | 52.3 | −136 ft | 62.7 | 550 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 15J
DENSITY ALTITUDE
Field elevation 235 ft — the air behaves like 2,274 ft.
- PRESSURE ALT
- 236 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 Georgia fields
- 4J2 — Berrien County
Nashville · elev 240 ft
- KMUL — Spence
Moultrie · elev 292 ft
- KTMA — Henry Tift Myers
Tifton · elev 355 ft
- KMGR — Moultrie Municipal
Moultrie · elev 297 ft
- 4J5 — Quitman Brooks County
Quitman · elev 185 ft
- KVLD — Valdosta Regional
Valdosta · elev 203 ft
- KTVI — Thomasville Regional
Thomasville · elev 264 ft
- KSYV — Sylvester
Sylvester · elev 403 ft
Frequently asked questions
How high does density altitude get at 15J in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Cook County reaches roughly 2,286 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 15J on an average day?
It swings with the seasons: from roughly −296 ft at the coldest month's average temperature to about 1,705 ft at the warmest month's — all from a constant field elevation of 235 ft. The month-by-month table above carries the full year.
What is the field elevation of Cook County?
235 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 15J (FAA), in Adel, Georgia.