Marshall, Texas · field elev 357 ft
Density Altitude at Harrison County (KASL)
Harrison County sits at 357 ft, and even a typical August afternoon (94 °F) only lifts density altitude to about 2,678 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 | 45.1 | −469 ft | 57.1 | 334 ft |
| February | 49.1 | −199 ft | 61.5 | 623 ft |
| March | 56.2 | 275 ft | 68.7 | 1,089 ft |
| April | 63.6 | 759 ft | 76.3 | 1,572 ft |
| May | 71.7 | 1,280 ft | 83.3 | 2,010 ft |
| June | 79.0 | 1,742 ft | 90.2 | 2,435 ft |
| July | 82.3 | 1,948 ft | 93.9 | 2,660 ft |
| August | 82.3 | 1,948 ft | 94.2 | 2,678 ft |
| September | 76.0 | 1,553 ft | 88.3 | 2,318 ft |
| October | 65.1 | 857 ft | 78.3 | 1,698 ft |
| November | 54.7 | 175 ft | 67.2 | 992 ft |
| December | 46.9 | −347 ft | 58.9 | 452 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 KASL
DENSITY ALTITUDE
Field elevation 357 ft — the air behaves like 2,666 ft.
- PRESSURE ALT
- 358 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 Texas fields
- 24F — Cypress River
Jefferson · elev 222 ft
- 6F7 — Manning Field
Jefferson · elev 320 ft
- 4F2 — Panola County-Sharpe Field
Carthage · elev 248 ft
- KGGG — East Texas Regional
Longview · elev 366 ft
- 07F — Gladewater Municipal
Gladewater · elev 297 ft
- KJXI — Fox Stephens Field/Gilmer Municipal
Gilmer · elev 415 ft
- KATA — Hall-Miller Municipal
Atlanta · elev 280 ft
- KRFI — Rusk County
Henderson · elev 442 ft
Frequently asked questions
How high does density altitude get at KASL in summer?
On a typical August afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Harrison County reaches roughly 2,678 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 KASL on an average day?
It swings with the seasons: from roughly −469 ft at the coldest month's average temperature to about 1,948 ft at the warmest month's — all from a constant field elevation of 357 ft. The month-by-month table above carries the full year.
What is the field elevation of Harrison County?
357 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KASL (ICAO) / ASL (FAA), in Marshall, Texas.