Alma, Nebraska · field elev 2,073 ft
Density Altitude at Alma Municipal (4D9)
Alma Municipal sits at 2,073 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 4,509 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 | 26.6 | 393 ft | 39.0 | 1,248 ft |
| February | 31.0 | 700 ft | 44.2 | 1,599 ft |
| March | 41.4 | 1,411 ft | 55.5 | 2,347 ft |
| April | 51.0 | 2,052 ft | 64.6 | 2,934 ft |
| May | 61.3 | 2,722 ft | 73.7 | 3,509 ft |
| June | 72.4 | 3,427 ft | 84.7 | 4,188 ft |
| July | 77.7 | 3,758 ft | 90.0 | 4,509 ft |
| August | 75.3 | 3,609 ft | 87.6 | 4,364 ft |
| September | 67.0 | 3,087 ft | 80.7 | 3,943 ft |
| October | 53.5 | 2,216 ft | 67.8 | 3,138 ft |
| November | 40.1 | 1,323 ft | 53.5 | 2,216 ft |
| December | 30.0 | 630 ft | 41.7 | 1,431 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 4D9
DENSITY ALTITUDE
Field elevation 2,073 ft — the air behaves like 4,509 ft.
- PRESSURE ALT
- 2,074 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 Nebraska fields
- KHDE — Brewster Field
Holdrege · elev 2,314 ft
- 37V — Arapahoe Municipal
Arapahoe · elev 2,273 ft
- 0V3 — Pioneer Village Field
Minden · elev 2,160 ft
- 7V7 — Red Cloud Municipal
Red Cloud · elev 1,744 ft
- KCSB — Cambridge Municipal
Cambridge · elev 2,414 ft
- KEAR — Kearney Regional
Kearney · elev 2,132 ft
- KLXN — Jim Kelly Field
Lexington · elev 2,413 ft
- KHSI — Hastings Municipal
Hastings · elev 1,961 ft
Frequently asked questions
How high does density altitude get at 4D9 in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Alma Municipal reaches roughly 4,509 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 4D9 on an average day?
It swings with the seasons: from roughly 393 ft at the coldest month's average temperature to about 3,758 ft at the warmest month's — all from a constant field elevation of 2,073 ft. The month-by-month table above carries the full year.
What is the field elevation of Alma Municipal?
2,073 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4D9 (FAA), in Alma, Nebraska.