Alexander City, Alabama · field elev 686 ft
Density Altitude at Thomas C Russell Field (KALX)
Thomas C Russell Field sits at 686 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 2,896 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 | 44.1 | −128 ft | 56.0 | 668 ft |
| February | 47.7 | 115 ft | 60.1 | 937 ft |
| March | 54.8 | 589 ft | 68.1 | 1,454 ft |
| April | 61.8 | 1,048 ft | 75.3 | 1,912 ft |
| May | 70.1 | 1,582 ft | 82.3 | 2,349 ft |
| June | 77.1 | 2,025 ft | 88.2 | 2,713 ft |
| July | 80.5 | 2,238 ft | 91.2 | 2,896 ft |
| August | 79.4 | 2,169 ft | 90.2 | 2,835 ft |
| September | 74.2 | 1,842 ft | 85.7 | 2,559 ft |
| October | 63.7 | 1,171 ft | 76.7 | 2,000 ft |
| November | 53.4 | 496 ft | 66.4 | 1,345 ft |
| December | 46.6 | 41 ft | 58.4 | 826 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 KALX
DENSITY ALTITUDE
Field elevation 686 ft — the air behaves like 2,884 ft.
- PRESSURE ALT
- 687 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
- KSCD — Merkel Field Sylacauga Municipal
Sylacauga · elev 569 ft
- 26A — Ashland/Lineville
Ashland/Lineville · elev 1,065 ft
- 08A — Wetumpka Municipal
Wetumpka · elev 197 ft
- 06A — Moton Field Municipal
Tuskegee · elev 264 ft
- KAUO — Auburn University Regional
Auburn · elev 777 ft
- 7A5 — Roanoke Municipal Enloe
Roanoke · elev 907 ft
- 02A — Chilton County
Clanton · elev 585 ft
- 7A3 — Lanett Regional
Lanett · elev 631 ft
Frequently asked questions
How high does density altitude get at KALX in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Thomas C Russell Field reaches roughly 2,896 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 KALX on an average day?
It swings with the seasons: from roughly −128 ft at the coldest month's average temperature to about 2,238 ft at the warmest month's — all from a constant field elevation of 686 ft. The month-by-month table above carries the full year.
What is the field elevation of Thomas C Russell Field?
686 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KALX (ICAO) / ALX (FAA), in Alexander City, Alabama.