Stephenville, Texas · field elev 1,321 ft
Density Altitude at Stephenville Clark Regional (KSEP)
Stephenville Clark Regional sits at 1,321 ft, and even a typical August afternoon (98 °F) only lifts density altitude to about 4,052 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 | 45.0 | 721 ft | 59.1 | 1,654 ft |
| February | 49.0 | 989 ft | 63.1 | 1,914 ft |
| March | 56.4 | 1,478 ft | 70.4 | 2,380 ft |
| April | 64.4 | 1,997 ft | 78.6 | 2,895 ft |
| May | 72.7 | 2,526 ft | 85.6 | 3,327 ft |
| June | 80.4 | 3,007 ft | 93.1 | 3,782 ft |
| July | 84.0 | 3,229 ft | 97.3 | 4,034 ft |
| August | 83.6 | 3,204 ft | 97.6 | 4,052 ft |
| September | 76.3 | 2,752 ft | 90.2 | 3,607 ft |
| October | 66.0 | 2,100 ft | 80.5 | 3,013 ft |
| November | 54.9 | 1,380 ft | 68.8 | 2,279 ft |
| December | 46.8 | 842 ft | 60.5 | 1,745 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 KSEP
DENSITY ALTITUDE
Field elevation 1,321 ft — the air behaves like 4,076 ft.
- PRESSURE ALT
- 1,322 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
- 9F0 — Dublin Municipal
Dublin · elev 1,495 ft
- KGDJ — Granbury Regional
Granbury · elev 835 ft
- F78 — Horseshoe Bend
Weatherford · elev 715 ft
- KMKN — Comanche County-City
Comanche · elev 1,387 ft
- F23 — Ranger Municipal
Ranger · elev 1,470 ft
- KMNZ — Hamilton Municipal
Hamilton · elev 1,305 ft
- KETN — Eastland Municipal
Eastland · elev 1,468 ft
- KMWL — Mineral Wells Regional
Mineral Wells · elev 974 ft
Frequently asked questions
How high does density altitude get at KSEP in summer?
On a typical August afternoon — around 98 °F at the nearest NOAA normals station — density altitude at Stephenville Clark Regional reaches roughly 4,052 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 KSEP on an average day?
It swings with the seasons: from roughly 721 ft at the coldest month's average temperature to about 3,229 ft at the warmest month's — all from a constant field elevation of 1,321 ft. The month-by-month table above carries the full year.
What is the field elevation of Stephenville Clark Regional?
1,321 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSEP (ICAO) / SEP (FAA), in Stephenville, Texas.