Andalusia, Alabama · field elev 310 ft
Density Altitude at South Alabama Regional At Bill Benton Field (79J)
South Alabama Regional At Bill Benton Field sits at 310 ft, and even a typical July afternoon (94 °F) only lifts density altitude to about 2,603 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 | 52.2 | −49 ft | 63.2 | 675 ft |
| February | 55.7 | 183 ft | 67.2 | 934 ft |
| March | 62.1 | 604 ft | 74.6 | 1,407 ft |
| April | 68.3 | 1,005 ft | 80.7 | 1,791 ft |
| May | 75.6 | 1,470 ft | 87.8 | 2,230 ft |
| June | 81.9 | 1,865 ft | 92.2 | 2,499 ft |
| July | 83.9 | 1,990 ft | 93.9 | 2,603 ft |
| August | 83.4 | 1,959 ft | 93.1 | 2,554 ft |
| September | 79.5 | 1,715 ft | 89.6 | 2,341 ft |
| October | 69.6 | 1,089 ft | 81.1 | 1,815 ft |
| November | 59.8 | 453 ft | 71.9 | 1,235 ft |
| December | 53.7 | 51 ft | 64.4 | 753 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 79J
DENSITY ALTITUDE
Field elevation 310 ft — the air behaves like 2,609 ft.
- PRESSURE ALT
- 311 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 Alabama fields
- 0J4 — Florala Municipal
Florala · elev 314 ft
- 14J — Carl Folsom
Elba · elev 258 ft
- 1A4 — Logan Field
Samson · elev 200 ft
- KEDN — Enterprise Municipal
Enterprise · elev 361 ft
- 04A — Frank Sikes
Luverne · elev 302 ft
- 33J — Geneva Municipal
Geneva · elev 100 ft
- KGZH — Evergreen Regional/Middleton Field
Evergreen · elev 259 ft
- KPRN — Mac Crenshaw Meml
Greenville · elev 451 ft
Frequently asked questions
How high does density altitude get at 79J in summer?
On a typical July afternoon — around 94 °F at the nearest NOAA normals station — density altitude at South Alabama Regional At Bill Benton Field reaches roughly 2,603 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 79J on an average day?
It swings with the seasons: from roughly −49 ft at the coldest month's average temperature to about 1,990 ft at the warmest month's — all from a constant field elevation of 310 ft. The month-by-month table above carries the full year.
What is the field elevation of South Alabama Regional At Bill Benton Field?
310 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 79J (FAA), in Andalusia, Alabama.