Springfield, Tennessee · field elev 706 ft
Density Altitude at Springfield Robertson County (M91)
Springfield Robertson County sits at 706 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,756 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 | 36.2 | −645 ft | 45.3 | −22 ft |
| February | 39.7 | −404 ft | 49.7 | 274 ft |
| March | 48.1 | 167 ft | 58.9 | 883 ft |
| April | 57.8 | 811 ft | 69.0 | 1,537 ft |
| May | 66.8 | 1,396 ft | 77.2 | 2,056 ft |
| June | 74.8 | 1,905 ft | 85.1 | 2,547 ft |
| July | 78.4 | 2,131 ft | 88.5 | 2,756 ft |
| August | 77.2 | 2,056 ft | 88.1 | 2,731 ft |
| September | 70.9 | 1,658 ft | 82.3 | 2,374 ft |
| October | 59.4 | 916 ft | 71.2 | 1,677 ft |
| November | 48.2 | 173 ft | 58.7 | 870 ft |
| December | 39.7 | −404 ft | 48.7 | 207 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 M91
DENSITY ALTITUDE
Field elevation 706 ft — the air behaves like 2,786 ft.
- PRESSURE ALT
- 707 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
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- KBNA — Nashville International
Nashville · elev 599 ft
- M02 — Dickson Municipal
Dickson · elev 892 ft
- M54 — Lebanon Municipal
Lebanon · elev 588 ft
- KMQY — Smyrna
Smyrna · elev 543 ft
Frequently asked questions
How high does density altitude get at M91 in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Springfield Robertson County reaches roughly 2,756 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 M91 on an average day?
It swings with the seasons: from roughly −645 ft at the coldest month's average temperature to about 2,131 ft at the warmest month's — all from a constant field elevation of 706 ft. The month-by-month table above carries the full year.
What is the field elevation of Springfield Robertson County?
706 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is M91 (FAA), in Springfield, Tennessee.