Lafayette, Tennessee · field elev 969 ft
Density Altitude at Lafayette Municipal (3M7)
Lafayette Municipal sits at 969 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 3,064 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 | 35.7 | −351 ft | 44.6 | 257 ft |
| February | 40.1 | −49 ft | 49.5 | 586 ft |
| March | 48.8 | 540 ft | 58.9 | 1,207 ft |
| April | 58.6 | 1,188 ft | 69.5 | 1,891 ft |
| May | 67.1 | 1,738 ft | 77.8 | 2,415 ft |
| June | 75.0 | 2,240 ft | 85.1 | 2,868 ft |
| July | 78.6 | 2,465 ft | 88.3 | 3,064 ft |
| August | 77.6 | 2,403 ft | 87.9 | 3,039 ft |
| September | 70.9 | 1,980 ft | 81.7 | 2,658 ft |
| October | 59.7 | 1,260 ft | 71.2 | 1,999 ft |
| November | 48.7 | 533 ft | 59.2 | 1,227 ft |
| December | 39.6 | −83 ft | 48.5 | 519 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 3M7
DENSITY ALTITUDE
Field elevation 969 ft — the air behaves like 3,045 ft.
- PRESSURE ALT
- 970 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
- KXNX — Music City Exec
Gallatin · elev 583 ft
- 1M5 — Douglas Hunter Field
Portland · elev 818 ft
- 1A7 — Jackson County
Gainesboro · elev 517 ft
- M54 — Lebanon Municipal
Lebanon · elev 588 ft
- 0A3 — Smithville Municipal
Smithville · elev 1,084 ft
- 8A3 — Livingston Municipal
Livingston · elev 1,372 ft
- KSRB — Upper Cumberland Regional
Sparta · elev 1,025 ft
- KMQY — Smyrna
Smyrna · elev 543 ft
Frequently asked questions
How high does density altitude get at 3M7 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Lafayette Municipal reaches roughly 3,064 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 3M7 on an average day?
It swings with the seasons: from roughly −351 ft at the coldest month's average temperature to about 2,465 ft at the warmest month's — all from a constant field elevation of 969 ft. The month-by-month table above carries the full year.
What is the field elevation of Lafayette Municipal?
969 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3M7 (FAA), in Lafayette, Tennessee.