Jasper, Alabama · field elev 483 ft
Density Altitude at Walker County/Bevill Field (KJFX)
Walker County/Bevill Field sits at 483 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 2,564 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 | 41.3 | −571 ft | 52.0 | 152 ft |
| February | 44.9 | −326 ft | 56.2 | 430 ft |
| March | 52.7 | 198 ft | 65.0 | 1,005 ft |
| April | 60.6 | 719 ft | 73.3 | 1,537 ft |
| May | 68.9 | 1,256 ft | 80.2 | 1,971 ft |
| June | 76.0 | 1,707 ft | 86.3 | 2,349 ft |
| July | 79.7 | 1,940 ft | 89.8 | 2,564 ft |
| August | 79.1 | 1,902 ft | 89.7 | 2,557 ft |
| September | 73.3 | 1,537 ft | 84.4 | 2,232 ft |
| October | 61.9 | 804 ft | 74.4 | 1,606 ft |
| November | 51.3 | 105 ft | 63.7 | 921 ft |
| December | 44.0 | −387 ft | 54.7 | 331 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 KJFX
DENSITY ALTITUDE
Field elevation 483 ft — the air behaves like 2,576 ft.
- PRESSURE ALT
- 484 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
- 2A8 — Addison
Addison · elev 786 ft
- 1M4 — Posey Field
Haleyville · elev 930 ft
- M95 — Richard Arthur Field
Fayette · elev 357 ft
- KCMD — Cullman Regional/Folsom Field
Cullman · elev 970 ft
- KBHM — Birmingham-Shuttlesworth International
Birmingham · elev 650 ft
- 5M0 — Hartselle/Morgan County Regional
Hartselle · elev 629 ft
- KHAB — Marion County-Rankin Fite
Hamilton · elev 436 ft
- M22 — Bill Pugh Field
Russellville · elev 718 ft
Frequently asked questions
How high does density altitude get at KJFX in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Walker County/Bevill Field reaches roughly 2,564 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 KJFX on an average day?
It swings with the seasons: from roughly −571 ft at the coldest month's average temperature to about 1,940 ft at the warmest month's — all from a constant field elevation of 483 ft. The month-by-month table above carries the full year.
What is the field elevation of Walker County/Bevill Field?
483 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJFX (ICAO) / JFX (FAA), in Jasper, Alabama.