Portland, Tennessee · field elev 818 ft
Density Altitude at Douglas Hunter Field (1M5)
Douglas Hunter Field sits at 818 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,910 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 | 36.0 | −519 ft | 45.3 | 117 ft |
| February | 39.9 | −251 ft | 50.3 | 453 ft |
| March | 48.1 | 306 ft | 59.1 | 1,034 ft |
| April | 58.2 | 975 ft | 69.8 | 1,725 ft |
| May | 67.2 | 1,559 ft | 77.7 | 2,224 ft |
| June | 75.1 | 2,061 ft | 85.3 | 2,696 ft |
| July | 78.6 | 2,280 ft | 88.8 | 2,910 ft |
| August | 77.5 | 2,212 ft | 88.1 | 2,868 ft |
| September | 70.9 | 1,795 ft | 82.2 | 2,504 ft |
| October | 59.7 | 1,074 ft | 71.4 | 1,827 ft |
| November | 48.2 | 312 ft | 58.9 | 1,021 ft |
| December | 39.6 | −271 ft | 48.9 | 359 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 1M5
DENSITY ALTITUDE
Field elevation 818 ft — the air behaves like 2,922 ft.
- PRESSURE ALT
- 819 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
- 3M7 — Lafayette Municipal
Lafayette · elev 969 ft
- M91 — Springfield Robertson County
Springfield · elev 706 ft
- M54 — Lebanon Municipal
Lebanon · elev 588 ft
- KBNA — Nashville International
Nashville · elev 599 ft
- KJWN — John C Tune
Nashville · elev 501 ft
- KMQY — Smyrna
Smyrna · elev 543 ft
- 1A7 — Jackson County
Gainesboro · elev 517 ft
Frequently asked questions
How high does density altitude get at 1M5 in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Douglas Hunter Field reaches roughly 2,910 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 1M5 on an average day?
It swings with the seasons: from roughly −519 ft at the coldest month's average temperature to about 2,280 ft at the warmest month's — all from a constant field elevation of 818 ft. The month-by-month table above carries the full year.
What is the field elevation of Douglas Hunter Field?
818 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1M5 (FAA), in Portland, Tennessee.