Wilmington, Delaware · field elev 80 ft
Density Altitude at New Castle (KILG)
New Castle sits at 80 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 1,888 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 | 33.5 | −1,614 ft | 41.4 | −1,066 ft |
| February | 35.5 | −1,474 ft | 44.1 | −881 ft |
| March | 43.2 | −943 ft | 52.5 | −314 ft |
| April | 53.9 | −221 ft | 64.2 | 457 ft |
| May | 63.5 | 412 ft | 73.5 | 1,055 ft |
| June | 72.6 | 998 ft | 82.2 | 1,603 ft |
| July | 77.6 | 1,315 ft | 86.8 | 1,888 ft |
| August | 75.8 | 1,201 ft | 84.9 | 1,771 ft |
| September | 68.9 | 761 ft | 78.5 | 1,371 ft |
| October | 57.2 | −2 ft | 67.0 | 639 ft |
| November | 46.6 | −711 ft | 55.9 | −88 ft |
| December | 38.2 | −1,287 ft | 46.0 | −752 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 KILG
DENSITY ALTITUDE
Field elevation 80 ft — the air behaves like 1,901 ft.
- PRESSURE ALT
- 81 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 Delaware fields
- KEVY — Summit
Middletown · elev 70 ft
- 38N — Smyrna
Smyrna · elev 18 ft
- 33N — Delaware Airpark
Dover/Cheswold · elev 55 ft
- 0N4 — Chandelle
Dover · elev 22 ft
- KDOV — Dover AFB
Dover · elev 29 ft
- 15N — Jenkins
Wyoming · elev 53 ft
- D74 — Chorman
Farmington · elev 65 ft
- KGED — Delaware Coastal
Georgetown · elev 53 ft
Frequently asked questions
How high does density altitude get at KILG in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at New Castle reaches roughly 1,888 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 KILG on an average day?
It swings with the seasons: from roughly −1,614 ft at the coldest month's average temperature to about 1,315 ft at the warmest month's — all from a constant field elevation of 80 ft. The month-by-month table above carries the full year.
What is the field elevation of New Castle?
80 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KILG (ICAO) / ILG (FAA), in Wilmington, Delaware.