Star City, Arkansas · field elev 398 ft
Density Altitude at Jb West Municipal Airport (55M)
Jb West Municipal Airport sits at 398 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 2,600 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 | 42.9 | −568 ft | 52.3 | 66 ft |
| February | 47.1 | −283 ft | 57.3 | 398 ft |
| March | 55.1 | 252 ft | 65.8 | 952 ft |
| April | 63.2 | 784 ft | 74.4 | 1,502 ft |
| May | 71.8 | 1,337 ft | 82.1 | 1,985 ft |
| June | 79.0 | 1,792 ft | 88.7 | 2,393 ft |
| July | 82.4 | 2,004 ft | 92.1 | 2,600 ft |
| August | 81.7 | 1,960 ft | 92.1 | 2,600 ft |
| September | 75.7 | 1,584 ft | 86.9 | 2,282 ft |
| October | 64.4 | 862 ft | 76.3 | 1,622 ft |
| November | 53.9 | 173 ft | 64.8 | 888 ft |
| December | 45.7 | −377 ft | 55.2 | 259 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 55M
DENSITY ALTITUDE
Field elevation 398 ft — the air behaves like 2,594 ft.
- PRESSURE ALT
- 399 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 Arkansas fields
- KPBF — Pinebluff Regional/Grider Field
Pine Bluff · elev 206 ft
- 0M0 — Billy Free Municipal
Dumas · elev 164 ft
- KLLQ — Monticello Municipal/Ellis Field
Monticello · elev 268 ft
- 3M9 — Warren Municipal/John B Frazer Jr Field
Warren · elev 235 ft
- 5M4 — Fordyce Municipal
Fordyce · elev 193 ft
- 99A — Smith'S International
Sherrill · elev 218 ft
- 7M1 — Mc Gehee Municipal
Mc Gehee · elev 141 ft
- 4M5 — Dermott Municipal
Dermott · elev 135 ft
Frequently asked questions
How high does density altitude get at 55M in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Jb West Municipal Airport reaches roughly 2,600 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 55M on an average day?
It swings with the seasons: from roughly −568 ft at the coldest month's average temperature to about 2,004 ft at the warmest month's — all from a constant field elevation of 398 ft. The month-by-month table above carries the full year.
What is the field elevation of Jb West Municipal Airport?
398 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 55M (FAA), in Star City, Arkansas.