Hammond, Louisiana · field elev 46 ft
Density Altitude at Hammond Northshore Regional (KHDC)
Hammond Northshore Regional sits at 46 ft, and even a typical August afternoon (92 °F) only lifts density altitude to about 2,154 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 | 49.9 | −531 ft | 61.5 | 239 ft |
| February | 53.5 | −289 ft | 65.2 | 480 ft |
| March | 60.0 | 141 ft | 71.5 | 886 ft |
| April | 66.2 | 545 ft | 77.6 | 1,273 ft |
| May | 73.5 | 1,013 ft | 84.5 | 1,704 ft |
| June | 79.4 | 1,386 ft | 89.8 | 2,031 ft |
| July | 81.5 | 1,518 ft | 91.5 | 2,135 ft |
| August | 81.4 | 1,511 ft | 91.8 | 2,154 ft |
| September | 77.5 | 1,267 ft | 88.0 | 1,921 ft |
| October | 68.1 | 668 ft | 80.6 | 1,461 ft |
| November | 58.0 | 9 ft | 70.4 | 815 ft |
| December | 52.1 | −383 ft | 63.7 | 383 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 KHDC
DENSITY ALTITUDE
Field elevation 46 ft — the air behaves like 2,166 ft.
- PRESSURE ALT
- 47 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 Louisiana fields
- L31 — St Tammany Regional
Covington · elev 38 ft
- 2R7 — Franklinton
Franklinton · elev 175 ft
- KAPS — Port Of South Louisiana Exec Regional
Reserve · elev 7 ft
- KASD — Slidell
Slidell · elev 28 ft
- KMSY — Louis Armstrong New Orleans International
New Orleans · elev 3 ft
- KBXA — George R Carr Meml Air Field
Bogalusa · elev 119 ft
- KREG — Louisiana Regional
Gonzales · elev 14 ft
- KNEW — Lakefront
New Orleans · elev 7 ft
Frequently asked questions
How high does density altitude get at KHDC in summer?
On a typical August afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Hammond Northshore Regional reaches roughly 2,154 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 KHDC on an average day?
It swings with the seasons: from roughly −531 ft at the coldest month's average temperature to about 1,518 ft at the warmest month's — all from a constant field elevation of 46 ft. The month-by-month table above carries the full year.
What is the field elevation of Hammond Northshore Regional?
46 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHDC (ICAO) / HDC (FAA), in Hammond, Louisiana.