Zellwood, Florida · field elev 78 ft
Density Altitude at Bob White Field (X61)
Bob White Field sits at 78 ft, and even a typical July afternoon (93 °F) only lifts density altitude to about 2,235 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 | 57.6 | 22 ft | 70.8 | 880 ft |
| February | 60.5 | 213 ft | 74.0 | 1,084 ft |
| March | 64.4 | 468 ft | 79.1 | 1,407 ft |
| April | 69.7 | 810 ft | 83.3 | 1,669 ft |
| May | 76.0 | 1,211 ft | 88.5 | 1,991 ft |
| June | 80.9 | 1,519 ft | 90.8 | 2,132 ft |
| July | 82.7 | 1,632 ft | 92.5 | 2,235 ft |
| August | 82.4 | 1,613 ft | 92.3 | 2,223 ft |
| September | 80.2 | 1,476 ft | 90.0 | 2,083 ft |
| October | 73.5 | 1,053 ft | 84.4 | 1,737 ft |
| November | 66.3 | 591 ft | 78.1 | 1,344 ft |
| December | 60.7 | 226 ft | 72.9 | 1,014 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 X61
DENSITY ALTITUDE
Field elevation 78 ft — the air behaves like 2,266 ft.
- PRESSURE ALT
- 79 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
- X04 — Orlando Apopka
Apopka · elev 150 ft
- X55 — Mid-Florida
Eustis · elev 167 ft
- KLEE — Leesburg International
Leesburg · elev 76 ft
- X23 — Umatilla Municipal
Umatilla · elev 106 ft
- KORL — Orlando Exec
Orlando · elev 113 ft
- KSFB — Orlando Sanford International
Orlando · elev 55 ft
- KMCO — Orlando International
Orlando · elev 96 ft
- KDED — Deland Municipal-Sidney H Taylor Field
Deland · elev 79 ft
Frequently asked questions
How high does density altitude get at X61 in summer?
On a typical July afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Bob White Field reaches roughly 2,235 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 X61 on an average day?
It swings with the seasons: from roughly 22 ft at the coldest month's average temperature to about 1,632 ft at the warmest month's — all from a constant field elevation of 78 ft. The month-by-month table above carries the full year.
What is the field elevation of Bob White Field?
78 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is X61 (FAA), in Zellwood, Florida.