Diamondhead, Mississippi · field elev 14 ft
Density Altitude at Diamondhead (66Y)
Diamondhead sits at 14 ft, and even a typical August afternoon (89 °F) only lifts density altitude to about 1,943 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 | 50.5 | −530 ft | 59.4 | 62 ft |
| February | 53.8 | −309 ft | 63.1 | 304 ft |
| March | 59.8 | 88 ft | 68.6 | 660 ft |
| April | 66.2 | 506 ft | 74.8 | 1,057 ft |
| May | 73.9 | 1,000 ft | 81.7 | 1,491 ft |
| June | 79.5 | 1,353 ft | 86.8 | 1,808 ft |
| July | 81.4 | 1,472 ft | 88.5 | 1,912 ft |
| August | 81.5 | 1,479 ft | 89.0 | 1,943 ft |
| September | 77.9 | 1,253 ft | 85.7 | 1,740 ft |
| October | 68.7 | 667 ft | 78.0 | 1,259 ft |
| November | 58.5 | 3 ft | 68.2 | 635 ft |
| December | 52.2 | −416 ft | 61.3 | 187 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 66Y
DENSITY ALTITUDE
Field elevation 14 ft — the air behaves like 1,943 ft.
- PRESSURE ALT
- 15 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 Mississippi fields
- KHSA — Stennis International
Bay St Louis · elev 23 ft
- KMJD — Picayune Municipal
Picayune · elev 55 ft
- KGPT — Gulfport-Biloxi International
Gulfport · elev 28 ft
- M13 — Poplarville/Pearl River County
Poplarville · elev 319 ft
- M24 — Dean Griffin Meml
Wiggins · elev 273 ft
- 5R2 — Ocean Springs
Ocean Springs · elev 20 ft
- 4R1 — I H Bass Jr Meml
Lumberton · elev 310 ft
- KPQL — Trent Lott International
Pascagoula · elev 17 ft
Frequently asked questions
How high does density altitude get at 66Y in summer?
On a typical August afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Diamondhead reaches roughly 1,943 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 66Y on an average day?
It swings with the seasons: from roughly −530 ft at the coldest month's average temperature to about 1,479 ft at the warmest month's — all from a constant field elevation of 14 ft. The month-by-month table above carries the full year.
What is the field elevation of Diamondhead?
14 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 66Y (FAA), in Diamondhead, Mississippi.