Evergreen, Alabama · field elev 259 ft
Density Altitude at Evergreen Regional/Middleton Field (KGZH)
Evergreen Regional/Middleton Field sits at 259 ft, and even a typical July afternoon (93 °F) only lifts density altitude to about 2,498 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 | 50.4 | −233 ft | 62.4 | 561 ft |
| February | 54.1 | 14 ft | 66.6 | 833 ft |
| March | 60.4 | 430 ft | 73.4 | 1,268 ft |
| April | 66.2 | 807 ft | 79.5 | 1,653 ft |
| May | 74.3 | 1,325 ft | 87.2 | 2,131 ft |
| June | 80.4 | 1,709 ft | 91.7 | 2,407 ft |
| July | 82.6 | 1,847 ft | 93.2 | 2,498 ft |
| August | 82.2 | 1,822 ft | 92.9 | 2,480 ft |
| September | 78.1 | 1,565 ft | 89.4 | 2,266 ft |
| October | 68.2 | 936 ft | 81.1 | 1,753 ft |
| November | 57.8 | 259 ft | 71.1 | 1,122 ft |
| December | 52.3 | −106 ft | 64.1 | 671 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 KGZH
DENSITY ALTITUDE
Field elevation 259 ft — the air behaves like 2,486 ft.
- PRESSURE ALT
- 260 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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- 79J — South Alabama Regional At Bill Benton Field
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- KPRN — Mac Crenshaw Meml
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- 61A — Camden Municipal
Camden · elev 143 ft
- 0J4 — Florala Municipal
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- 4R3 — Jackson Municipal
Jackson · elev 62 ft
Frequently asked questions
How high does density altitude get at KGZH in summer?
On a typical July afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Evergreen Regional/Middleton Field reaches roughly 2,498 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 KGZH on an average day?
It swings with the seasons: from roughly −233 ft at the coldest month's average temperature to about 1,847 ft at the warmest month's — all from a constant field elevation of 259 ft. The month-by-month table above carries the full year.
What is the field elevation of Evergreen Regional/Middleton Field?
259 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGZH (ICAO) / GZH (FAA), in Evergreen, Alabama.