Post, Texas · field elev 2,545 ft
Density Altitude at Post-Garza County Municipal (5F1)
From a field elevation of 2,545 ft, a typical July afternoon at Post-Garza County Municipal (95 °F) raises density altitude to about 5,392 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 42.3 | 2,057 ft | 55.9 | 2,954 ft |
| February | 46.0 | 2,304 ft | 60.5 | 3,251 ft |
| March | 53.8 | 2,818 ft | 68.6 | 3,766 ft |
| April | 62.1 | 3,354 ft | 77.4 | 4,315 ft |
| May | 71.1 | 3,923 ft | 85.1 | 4,786 ft |
| June | 79.2 | 4,426 ft | 92.5 | 5,231 ft ▲ |
| July | 82.5 | 4,628 ft | 95.2 | 5,392 ft ▲ |
| August | 81.4 | 4,561 ft | 94.2 | 5,332 ft ▲ |
| September | 73.8 | 4,092 ft | 86.4 | 4,865 ft |
| October | 63.8 | 3,462 ft | 77.5 | 4,321 ft |
| November | 51.9 | 2,693 ft | 65.5 | 3,570 ft |
| December | 43.5 | 2,137 ft | 56.5 | 2,993 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 5F1
DENSITY ALTITUDE caution
Field elevation 2,545 ft — the air behaves like 5,380 ft.
- PRESSURE ALT
- 2,547 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 5F1 in summer?
On a typical July afternoon — around 95 °F at the nearest NOAA normals station — density altitude at Post-Garza County Municipal reaches roughly 5,392 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 5F1 on an average day?
It swings with the seasons: from roughly 2,057 ft at the coldest month's average temperature to about 4,628 ft at the warmest month's — all from a constant field elevation of 2,545 ft. The month-by-month table above carries the full year.
What is the field elevation of Post-Garza County Municipal?
2,545 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5F1 (FAA), in Post, Texas.