La Porte, Texas · field elev 25 ft
Density Altitude at La Porte Municipal (T41)
La Porte Municipal sits at 25 ft, and even a typical August afternoon (94 °F) only lifts density altitude to about 2,232 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 | 55.0 | −216 ft | 63.8 | 363 ft |
| February | 58.8 | 36 ft | 67.6 | 610 ft |
| March | 64.7 | 422 ft | 73.4 | 981 ft |
| April | 70.5 | 796 ft | 79.3 | 1,354 ft |
| May | 77.6 | 1,247 ft | 85.9 | 1,766 ft |
| June | 82.9 | 1,579 ft | 91.0 | 2,079 ft |
| July | 84.8 | 1,697 ft | 92.9 | 2,195 ft |
| August | 85.1 | 1,716 ft | 93.5 | 2,232 ft |
| September | 81.1 | 1,467 ft | 89.3 | 1,975 ft |
| October | 73.0 | 956 ft | 82.1 | 1,529 ft |
| November | 63.3 | 331 ft | 72.6 | 930 ft |
| December | 56.9 | −90 ft | 65.7 | 487 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 T41
DENSITY ALTITUDE
Field elevation 25 ft — the air behaves like 2,262 ft.
- PRESSURE ALT
- 26 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 T41 in summer?
On a typical August afternoon — around 94 °F at the nearest NOAA normals station — density altitude at La Porte Municipal reaches roughly 2,232 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 T41 on an average day?
It swings with the seasons: from roughly −216 ft at the coldest month's average temperature to about 1,716 ft at the warmest month's — all from a constant field elevation of 25 ft. The month-by-month table above carries the full year.
What is the field elevation of La Porte Municipal?
25 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is T41 (FAA), in La Porte, Texas.