Justin, Texas · field elev 705 ft
Density Altitude at Clark (3T6)
Clark sits at 705 ft, and even a typical July afternoon (96 °F) only lifts density altitude to about 3,191 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 | 44.0 | −111 ft | 55.7 | 672 ft |
| February | 48.2 | 172 ft | 60.0 | 954 ft |
| March | 56.1 | 698 ft | 67.6 | 1,446 ft |
| April | 63.2 | 1,162 ft | 75.0 | 1,916 ft |
| May | 72.1 | 1,733 ft | 82.9 | 2,410 ft |
| June | 80.3 | 2,248 ft | 91.3 | 2,925 ft |
| July | 84.4 | 2,503 ft | 95.7 | 3,191 ft |
| August | 84.1 | 2,484 ft | 95.6 | 3,185 ft |
| September | 76.2 | 1,992 ft | 88.1 | 2,730 ft |
| October | 65.2 | 1,291 ft | 77.6 | 2,080 ft |
| November | 54.3 | 579 ft | 66.1 | 1,349 ft |
| December | 45.5 | −10 ft | 56.8 | 744 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 3T6
DENSITY ALTITUDE
Field elevation 705 ft — the air behaves like 3,209 ft.
- PRESSURE ALT
- 706 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
- 74T — Hicks
Ponder · elev 725 ft
- 16X — Propwash
Justin · elev 804 ft
- 52F — Aero Valley
Roanoke · elev 643 ft
- KDTO — Denton Enterprise
Denton · elev 643 ft
- 70T — Fairview
Rhome · elev 915 ft
- KAFW — Perot Field/Fort Worth Alliance
Fort Worth · elev 723 ft
- 58T — Heritage Creek Airstrip
Decatur · elev 883 ft
- T76 — Rhome Meadows
Rhome · elev 900 ft
Frequently asked questions
How high does density altitude get at 3T6 in summer?
On a typical July afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Clark reaches roughly 3,191 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 3T6 on an average day?
It swings with the seasons: from roughly −111 ft at the coldest month's average temperature to about 2,503 ft at the warmest month's — all from a constant field elevation of 705 ft. The month-by-month table above carries the full year.
What is the field elevation of Clark?
705 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3T6 (FAA), in Justin, Texas.