Memphis, Tennessee · field elev 225 ft
Density Altitude at General Dewitt Spain (M01)
General Dewitt Spain sits at 225 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 2,298 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 | 39.8 | −996 ft | 48.5 | −403 ft |
| February | 43.8 | −722 ft | 53.6 | −61 ft |
| March | 52.2 | −155 ft | 62.1 | 499 ft |
| April | 61.6 | 466 ft | 71.9 | 1,131 ft |
| May | 70.8 | 1,061 ft | 80.4 | 1,668 ft |
| June | 78.8 | 1,568 ft | 88.2 | 2,151 ft |
| July | 81.7 | 1,749 ft | 90.6 | 2,298 ft |
| August | 80.7 | 1,687 ft | 90.3 | 2,280 ft |
| September | 74.8 | 1,315 ft | 85.4 | 1,979 ft |
| October | 63.3 | 577 ft | 74.7 | 1,309 ft |
| November | 51.6 | −195 ft | 61.7 | 473 ft |
| December | 43.1 | −769 ft | 51.6 | −195 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 M01
DENSITY ALTITUDE
Field elevation 225 ft — the air behaves like 2,323 ft.
- PRESSURE ALT
- 226 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
- 2M8 — Charles W Baker
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- KFYE — Fayette County
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- M04 — Covington Municipal
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- M08 — William L Whitehurst Field
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- KDYR — Dyersburg Regional
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- KMKL — Jackson Regional
Jackson · elev 435 ft
Frequently asked questions
How high does density altitude get at M01 in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at General Dewitt Spain reaches roughly 2,298 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 M01 on an average day?
It swings with the seasons: from roughly −996 ft at the coldest month's average temperature to about 1,749 ft at the warmest month's — all from a constant field elevation of 225 ft. The month-by-month table above carries the full year.
What is the field elevation of General Dewitt Spain?
225 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is M01 (FAA), in Memphis, Tennessee.