Vernon, Alabama · field elev 463 ft
Density Altitude at Lamar County (M55)
Lamar County sits at 463 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 2,661 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 | 44.2 | −399 ft | 55.0 | 326 ft |
| February | 48.1 | −135 ft | 59.4 | 616 ft |
| March | 55.8 | 379 ft | 68.0 | 1,174 ft |
| April | 62.9 | 844 ft | 75.9 | 1,677 ft |
| May | 71.1 | 1,372 ft | 82.7 | 2,102 ft |
| June | 78.2 | 1,821 ft | 89.0 | 2,490 ft |
| July | 81.2 | 2,009 ft | 91.8 | 2,661 ft |
| August | 80.9 | 1,990 ft | 91.8 | 2,661 ft |
| September | 75.1 | 1,626 ft | 86.7 | 2,349 ft |
| October | 64.2 | 929 ft | 77.1 | 1,752 ft |
| November | 53.8 | 247 ft | 65.6 | 1,019 ft |
| December | 46.6 | −236 ft | 57.1 | 465 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 M55
DENSITY ALTITUDE
Field elevation 463 ft — the air behaves like 2,673 ft.
- PRESSURE ALT
- 464 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
- M95 — Richard Arthur Field
Fayette · elev 357 ft
- KHAB — Marion County-Rankin Fite
Hamilton · elev 436 ft
- 3M8 — North Pickens
Reform · elev 237 ft
- 1M4 — Posey Field
Haleyville · elev 930 ft
- KJFX — Walker County/Bevill Field
Jasper · elev 483 ft
- M22 — Bill Pugh Field
Russellville · elev 718 ft
- KAIV — George Downer
Aliceville · elev 150 ft
- KTCL — Tuscaloosa Ntl
Tuscaloosa · elev 170 ft
Frequently asked questions
How high does density altitude get at M55 in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Lamar County reaches roughly 2,661 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 M55 on an average day?
It swings with the seasons: from roughly −399 ft at the coldest month's average temperature to about 2,009 ft at the warmest month's — all from a constant field elevation of 463 ft. The month-by-month table above carries the full year.
What is the field elevation of Lamar County?
463 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is M55 (FAA), in Vernon, Alabama.