Siloam Springs, Arkansas · field elev 1,191 ft
Density Altitude at Smith Field (KSLG)
Smith Field sits at 1,191 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 3,455 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 | 37.1 | 22 ft | 47.5 | 728 ft |
| February | 41.1 | 295 ft | 52.3 | 1,047 ft |
| March | 49.6 | 868 ft | 61.2 | 1,631 ft |
| April | 58.1 | 1,429 ft | 70.2 | 2,208 ft |
| May | 66.3 | 1,959 ft | 77.4 | 2,662 ft |
| June | 74.9 | 2,505 ft | 85.5 | 3,163 ft |
| July | 79.4 | 2,786 ft | 90.3 | 3,455 ft |
| August | 78.6 | 2,736 ft | 90.2 | 3,449 ft |
| September | 70.5 | 2,227 ft | 82.4 | 2,972 ft |
| October | 59.4 | 1,514 ft | 71.6 | 2,297 ft |
| November | 48.5 | 795 ft | 59.7 | 1,533 ft |
| December | 39.6 | 193 ft | 50.0 | 895 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 KSLG
DENSITY ALTITUDE
Field elevation 1,191 ft — the air behaves like 3,437 ft.
- PRESSURE ALT
- 1,192 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
- 5M5 — Crystal Lake
Decatur · elev 1,178 ft
- KXNA — Northwest Arkansas Ntl
Fayetteville/Springdale/Rogers · elev 1,288 ft
- KVBT — Bentonville Municipal/Louise M Thaden Field
Bentonville · elev 1,298 ft
- KASG — Springdale Municipal
Springdale · elev 1,353 ft
- KFYV — Drake Field
Fayetteville · elev 1,252 ft
- KROG — Rogers Exec - Carter Field
Rogers · elev 1,359 ft
- H34 — Huntsville Municipal
Huntsville · elev 1,748 ft
- 17A — Trigger Gap
Berryville · elev 1,650 ft
Frequently asked questions
How high does density altitude get at KSLG in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Smith Field reaches roughly 3,455 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 KSLG on an average day?
It swings with the seasons: from roughly 22 ft at the coldest month's average temperature to about 2,786 ft at the warmest month's — all from a constant field elevation of 1,191 ft. The month-by-month table above carries the full year.
What is the field elevation of Smith Field?
1,191 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSLG (ICAO) / SLG (FAA), in Siloam Springs, Arkansas.