Shelbyville, Tennessee · field elev 800 ft
Density Altitude at Bomar Field/Shelbyville Municipal (KSYI)
Bomar Field/Shelbyville Municipal sits at 800 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,925 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 | 39.1 | −328 ft | 49.4 | 370 ft |
| February | 42.7 | −82 ft | 53.8 | 663 ft |
| March | 50.6 | 451 ft | 62.5 | 1,234 ft |
| April | 59.5 | 1,038 ft | 72.0 | 1,843 ft |
| May | 67.8 | 1,575 ft | 79.5 | 2,315 ft |
| June | 75.4 | 2,058 ft | 86.4 | 2,741 ft |
| July | 78.8 | 2,271 ft | 89.4 | 2,925 ft |
| August | 77.8 | 2,208 ft | 89.0 | 2,901 ft |
| September | 71.8 | 1,830 ft | 83.9 | 2,588 ft |
| October | 60.6 | 1,110 ft | 73.4 | 1,932 ft |
| November | 49.3 | 364 ft | 61.6 | 1,175 ft |
| December | 42.0 | −129 ft | 52.4 | 570 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 KSYI
DENSITY ALTITUDE
Field elevation 800 ft — the air behaves like 2,901 ft.
- PRESSURE ALT
- 801 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 Tennessee fields
- KTHA — Tullahoma Regional/Wm Northern Field
Tullahoma · elev 1,084 ft
- KLUG — Ellington
Lewisburg · elev 718 ft
- KMBT — Murfreesboro Municipal
Murfreesboro · elev 614 ft
- KMQY — Smyrna
Smyrna · elev 543 ft
- KBGF — Winchester Municipal
Winchester · elev 979 ft
- KRNC — Warren County Meml
Mc Minnville · elev 1,032 ft
- KFYM — Fayetteville Municipal
Fayetteville · elev 984 ft
- KUOS — Franklin County
Sewanee · elev 1,953 ft
Frequently asked questions
How high does density altitude get at KSYI in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Bomar Field/Shelbyville Municipal reaches roughly 2,925 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 KSYI on an average day?
It swings with the seasons: from roughly −328 ft at the coldest month's average temperature to about 2,271 ft at the warmest month's — all from a constant field elevation of 800 ft. The month-by-month table above carries the full year.
What is the field elevation of Bomar Field/Shelbyville Municipal?
800 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSYI (ICAO) / SYI (FAA), in Shelbyville, Tennessee.