Montgomery, Alabama · field elev 221 ft
Density Altitude at Montgomery Regional (Dannelly Field) (KMGM)
Montgomery Regional (Dannelly Field) sits at 221 ft, and even a typical July afternoon (94 °F) only lifts density altitude to about 2,482 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 | 48.1 | −435 ft | 59.8 | 344 ft |
| February | 52.6 | −133 ft | 64.7 | 663 ft |
| March | 59.2 | 304 ft | 71.9 | 1,126 ft |
| April | 65.7 | 728 ft | 78.8 | 1,563 ft |
| May | 73.6 | 1,234 ft | 86.0 | 2,011 ft |
| June | 80.2 | 1,650 ft | 91.5 | 2,348 ft |
| July | 82.9 | 1,819 ft | 93.7 | 2,482 ft |
| August | 82.5 | 1,794 ft | 93.6 | 2,476 ft |
| September | 77.8 | 1,500 ft | 89.3 | 2,214 ft |
| October | 67.4 | 838 ft | 80.2 | 1,650 ft |
| November | 56.6 | 133 ft | 69.8 | 992 ft |
| December | 50.2 | −293 ft | 61.9 | 481 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 KMGM
DENSITY ALTITUDE
Field elevation 221 ft — the air behaves like 2,500 ft.
- PRESSURE ALT
- 222 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
- 1A9 — Prattville/Grouby Field
Prattville · elev 225 ft
- 08A — Wetumpka Municipal
Wetumpka · elev 197 ft
- KPRN — Mac Crenshaw Meml
Greenville · elev 451 ft
- KSEM — Craig Field
Selma · elev 166 ft
- 07A — Franklin Field
Union Springs · elev 301 ft
- KTOI — Troy Municipal At N Kenneth Campbell Field
Troy · elev 397 ft
- 04A — Frank Sikes
Luverne · elev 302 ft
- 02A — Chilton County
Clanton · elev 585 ft
Frequently asked questions
How high does density altitude get at KMGM in summer?
On a typical July afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Montgomery Regional (Dannelly Field) reaches roughly 2,482 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 KMGM on an average day?
It swings with the seasons: from roughly −435 ft at the coldest month's average temperature to about 1,819 ft at the warmest month's — all from a constant field elevation of 221 ft. The month-by-month table above carries the full year.
What is the field elevation of Montgomery Regional (Dannelly Field)?
221 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KMGM (ICAO) / MGM (FAA), in Montgomery, Alabama.