Fort Smith, Arkansas · field elev 469 ft
Density Altitude at Fort Smith Regional (KFSM)
Fort Smith Regional sits at 469 ft, and even a typical July afternoon (94 °F) only lifts density altitude to about 2,808 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 | 40.4 | −651 ft | 51.3 | 87 ft |
| February | 45.0 | −337 ft | 56.6 | 439 ft |
| March | 53.5 | 234 ft | 65.6 | 1,027 ft |
| April | 62.1 | 800 ft | 74.5 | 1,596 ft |
| May | 70.4 | 1,335 ft | 81.4 | 2,028 ft |
| June | 78.8 | 1,866 ft | 89.4 | 2,522 ft |
| July | 83.1 | 2,134 ft | 94.1 | 2,808 ft |
| August | 82.3 | 2,084 ft | 93.7 | 2,784 ft |
| September | 74.8 | 1,614 ft | 86.5 | 2,344 ft |
| October | 63.5 | 891 ft | 75.9 | 1,684 ft |
| November | 51.7 | 114 ft | 63.4 | 884 ft |
| December | 42.8 | −486 ft | 53.3 | 221 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 KFSM
DENSITY ALTITUDE
Field elevation 469 ft — the air behaves like 2,802 ft.
- PRESSURE ALT
- 470 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
- 4M2 — Booneville Municipal
Booneville · elev 468 ft
- 7M5 — Ozark/Franklin County
Ozark · elev 648 ft
- M27 — Waldron Municipal
Waldron · elev 705 ft
- 7M6 — Paris Municipal
Paris /Subiaco/ · elev 430 ft
- KFYV — Drake Field
Fayetteville · elev 1,252 ft
- H35 — Clarksville Municipal
Clarksville · elev 481 ft
- KMEZ — Mena Intermountain Municipal
Mena · elev 1,080 ft
- 32A — Danville Municipal
Danville · elev 393 ft
Frequently asked questions
How high does density altitude get at KFSM in summer?
On a typical July afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Fort Smith Regional reaches roughly 2,808 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 KFSM on an average day?
It swings with the seasons: from roughly −651 ft at the coldest month's average temperature to about 2,134 ft at the warmest month's — all from a constant field elevation of 469 ft. The month-by-month table above carries the full year.
What is the field elevation of Fort Smith Regional?
469 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KFSM (ICAO) / FSM (FAA), in Fort Smith, Arkansas.