Zapata, Texas · field elev 422 ft
Density Altitude at Zapata County (KAPY)
Zapata County sits at 422 ft, and even a typical August afternoon (99 °F) only lifts density altitude to about 3,052 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 | 57.4 | 434 ft | 68.2 | 1,136 ft |
| February | 62.6 | 774 ft | 73.9 | 1,500 ft |
| March | 69.5 | 1,220 ft | 81.1 | 1,952 ft |
| April | 76.3 | 1,652 ft | 88.1 | 2,385 ft |
| May | 82.4 | 2,033 ft | 93.4 | 2,708 ft |
| June | 87.0 | 2,318 ft | 98.3 | 3,004 ft |
| July | 87.4 | 2,342 ft | 98.2 | 2,998 ft |
| August | 87.9 | 2,373 ft | 99.1 | 3,052 ft |
| September | 82.7 | 2,052 ft | 92.7 | 2,666 ft |
| October | 75.8 | 1,620 ft | 86.5 | 2,287 ft |
| November | 66.0 | 995 ft | 76.2 | 1,645 ft |
| December | 58.1 | 480 ft | 68.2 | 1,136 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 KAPY
DENSITY ALTITUDE
Field elevation 422 ft — the air behaves like 3,046 ft.
- PRESSURE ALT
- 423 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
- KHBV — Jim Hogg County
Hebbronville · elev 663 ft
- KLRD — Laredo International
Laredo · elev 508 ft
- 67R — Rio Grande City Municipal
Rio Grande City · elev 290 ft
- KBKS — Brooks County
Falfurrias · elev 112 ft
- T19 — Duval-Freer
Freer · elev 564 ft
- KEBG — South Texas International At Edinburg
Edinburg · elev 75 ft
- KMFE — Mc Allen International
Mc Allen · elev 107 ft
- KIKG — Kleberg County
Kingsville · elev 130 ft
Frequently asked questions
How high does density altitude get at KAPY in summer?
On a typical August afternoon — around 99 °F at the nearest NOAA normals station — density altitude at Zapata County reaches roughly 3,052 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 KAPY on an average day?
It swings with the seasons: from roughly 434 ft at the coldest month's average temperature to about 2,373 ft at the warmest month's — all from a constant field elevation of 422 ft. The month-by-month table above carries the full year.
What is the field elevation of Zapata County?
422 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KAPY (ICAO) / APY (FAA), in Zapata, Texas.