Cisco, Texas · field elev 1,711 ft
Density Altitude at Gregory M Simmons Meml (KGZN)
Gregory M Simmons Meml sits at 1,711 ft, and even a typical August afternoon (96 °F) only lifts density altitude to about 4,405 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 | 44.6 | 1,177 ft | 57.3 | 2,018 ft |
| February | 48.0 | 1,405 ft | 61.0 | 2,258 ft |
| March | 55.9 | 1,926 ft | 69.0 | 2,770 ft |
| April | 64.1 | 2,457 ft | 77.5 | 3,303 ft |
| May | 72.3 | 2,978 ft | 84.4 | 3,729 ft |
| June | 79.8 | 3,446 ft | 91.1 | 4,136 ft |
| July | 83.7 | 3,686 ft | 95.5 | 4,399 ft |
| August | 83.4 | 3,667 ft | 95.6 | 4,405 ft |
| September | 75.9 | 3,204 ft | 88.1 | 3,954 ft |
| October | 65.7 | 2,560 ft | 78.4 | 3,359 ft |
| November | 54.4 | 1,828 ft | 66.9 | 2,636 ft |
| December | 46.0 | 1,271 ft | 58.2 | 2,076 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 KGZN
DENSITY ALTITUDE
Field elevation 1,711 ft — the air behaves like 4,429 ft.
- PRESSURE ALT
- 1,712 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
- 3F2 — Cisco Municipal
Cisco · elev 1,621 ft
- KETN — Eastland Municipal
Eastland · elev 1,468 ft
- F23 — Ranger Municipal
Ranger · elev 1,470 ft
- KBKD — Stephens County
Breckenridge · elev 1,284 ft
- T23 — Albany Municipal
Albany · elev 1,415 ft
- KABI — Abilene Regional
Abilene · elev 1,791 ft
- KMKN — Comanche County-City
Comanche · elev 1,387 ft
- KBWD — Brownwood Regional
Brownwood · elev 1,387 ft
Frequently asked questions
How high does density altitude get at KGZN in summer?
On a typical August afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Gregory M Simmons Meml reaches roughly 4,405 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 KGZN on an average day?
It swings with the seasons: from roughly 1,177 ft at the coldest month's average temperature to about 3,686 ft at the warmest month's — all from a constant field elevation of 1,711 ft. The month-by-month table above carries the full year.
What is the field elevation of Gregory M Simmons Meml?
1,711 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGZN (ICAO) / GZN (FAA), in Cisco, Texas.