Terrell, Texas · field elev 474 ft
Density Altitude at Terrell Municipal (KTRL)
Terrell Municipal sits at 474 ft, and even a typical August afternoon (96 °F) only lifts density altitude to about 2,947 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 | 46.5 | −229 ft | 57.4 | 498 ft |
| February | 50.7 | 54 ft | 61.7 | 780 ft |
| March | 57.9 | 531 ft | 69.2 | 1,264 ft |
| April | 65.1 | 1,001 ft | 76.4 | 1,722 ft |
| May | 73.9 | 1,564 ft | 84.4 | 2,221 ft |
| June | 81.3 | 2,028 ft | 91.6 | 2,662 ft |
| July | 85.0 | 2,258 ft | 95.7 | 2,911 ft |
| August | 85.2 | 2,270 ft | 96.3 | 2,947 ft |
| September | 78.2 | 1,835 ft | 89.5 | 2,534 ft |
| October | 67.6 | 1,162 ft | 79.3 | 1,904 ft |
| November | 56.5 | 439 ft | 67.7 | 1,168 ft |
| December | 48.3 | −108 ft | 59.0 | 603 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 KTRL
DENSITY ALTITUDE
Field elevation 474 ft — the air behaves like 2,929 ft.
- PRESSURE ALT
- 475 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
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Frequently asked questions
How high does density altitude get at KTRL in summer?
On a typical August afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Terrell Municipal reaches roughly 2,947 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 KTRL on an average day?
It swings with the seasons: from roughly −229 ft at the coldest month's average temperature to about 2,270 ft at the warmest month's — all from a constant field elevation of 474 ft. The month-by-month table above carries the full year.
What is the field elevation of Terrell Municipal?
474 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KTRL (ICAO) / TRL (FAA), in Terrell, Texas.