Weslaco, Texas · field elev 70 ft
Density Altitude at Mid Valley (KTXW)
Mid Valley sits at 70 ft, and even a typical August afternoon (97 °F) only lifts density altitude to about 2,516 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 | 60.7 | 216 ft | 71.3 | 903 ft |
| February | 64.4 | 458 ft | 75.4 | 1,163 ft |
| March | 70.4 | 845 ft | 80.7 | 1,497 ft |
| April | 75.7 | 1,182 ft | 86.3 | 1,845 ft |
| May | 80.9 | 1,510 ft | 90.3 | 2,091 ft |
| June | 85.1 | 1,771 ft | 94.6 | 2,353 ft |
| July | 86.1 | 1,833 ft | 95.7 | 2,420 ft |
| August | 86.9 | 1,882 ft | 97.3 | 2,516 ft |
| September | 82.4 | 1,603 ft | 92.0 | 2,195 ft |
| October | 76.6 | 1,239 ft | 87.2 | 1,901 ft |
| November | 69.2 | 768 ft | 79.9 | 1,447 ft |
| December | 61.8 | 288 ft | 72.0 | 947 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 KTXW
DENSITY ALTITUDE
Field elevation 70 ft — the air behaves like 2,498 ft.
- PRESSURE ALT
- 71 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
- KMFE — Mc Allen International
Mc Allen · elev 107 ft
- KHRL — Valley International
Harlingen · elev 36 ft
- KEBG — South Texas International At Edinburg
Edinburg · elev 75 ft
- KBRO — Brownsville/South Padre Island International
Brownsville · elev 22 ft
- KPIL — Cameron County
Port Isabel · elev 19 ft
- T05 — Charles R Johnson
Port Mansfield · elev 10 ft
- 67R — Rio Grande City Municipal
Rio Grande City · elev 290 ft
- KBKS — Brooks County
Falfurrias · elev 112 ft
Frequently asked questions
How high does density altitude get at KTXW in summer?
On a typical August afternoon — around 97 °F at the nearest NOAA normals station — density altitude at Mid Valley reaches roughly 2,516 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 KTXW on an average day?
It swings with the seasons: from roughly 216 ft at the coldest month's average temperature to about 1,882 ft at the warmest month's — all from a constant field elevation of 70 ft. The month-by-month table above carries the full year.
What is the field elevation of Mid Valley?
70 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KTXW (ICAO) / TXW (FAA), in Weslaco, Texas.