Titusville, Florida · field elev 30 ft
Density Altitude at Arthur Dunn Air Park (X21)
Arthur Dunn Air Park sits at 30 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 2,018 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 | 59.6 | 95 ft | 68.8 | 693 ft |
| February | 62.4 | 278 ft | 71.2 | 847 ft |
| March | 66.2 | 525 ft | 75.1 | 1,095 ft |
| April | 71.0 | 834 ft | 79.4 | 1,367 ft |
| May | 76.4 | 1,178 ft | 84.1 | 1,660 ft |
| June | 80.3 | 1,423 ft | 87.7 | 1,883 ft |
| July | 82.1 | 1,536 ft | 89.9 | 2,018 ft |
| August | 82.0 | 1,529 ft | 89.3 | 1,981 ft |
| September | 80.5 | 1,436 ft | 87.1 | 1,846 ft |
| October | 75.6 | 1,127 ft | 82.6 | 1,567 ft |
| November | 68.4 | 667 ft | 76.1 | 1,159 ft |
| December | 62.8 | 304 ft | 71.2 | 847 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 X21
DENSITY ALTITUDE
Field elevation 30 ft — the air behaves like 2,024 ft.
- PRESSURE ALT
- 31 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 Florida fields
- KTIX — Space Coast Regional
Titusville · elev 34 ft
- KCOI — Merritt Island
Merritt Island · elev 6 ft
- X50 — Massey Ranch Airpark
New Smyrna Beach · elev 11 ft
- KSFB — Orlando Sanford International
Orlando · elev 55 ft
- KORL — Orlando Exec
Orlando · elev 113 ft
- KEVB — New Smyrna Beach Municipal (Jack Bolt Field)
New Smyrna Beach · elev 11 ft
- KMCO — Orlando International
Orlando · elev 96 ft
- KMLB — Melbourne Orlando International
Melbourne · elev 33 ft
Frequently asked questions
How high does density altitude get at X21 in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Arthur Dunn Air Park reaches roughly 2,018 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 X21 on an average day?
It swings with the seasons: from roughly 95 ft at the coldest month's average temperature to about 1,536 ft at the warmest month's — all from a constant field elevation of 30 ft. The month-by-month table above carries the full year.
What is the field elevation of Arthur Dunn Air Park?
30 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is X21 (FAA), in Titusville, Florida.