Mc Gehee, Arkansas · field elev 141 ft
Density Altitude at Mc Gehee Municipal (7M1)
Mc Gehee Municipal sits at 141 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 2,220 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 | 42.4 | −922 ft | 50.8 | −352 ft |
| February | 46.3 | −656 ft | 55.4 | −46 ft |
| March | 54.6 | −99 ft | 64.1 | 526 ft |
| April | 63.1 | 461 ft | 73.1 | 1,104 ft |
| May | 71.7 | 1,015 ft | 81.6 | 1,640 ft |
| June | 78.8 | 1,465 ft | 88.3 | 2,055 ft |
| July | 81.4 | 1,628 ft | 91.0 | 2,220 ft |
| August | 80.5 | 1,571 ft | 91.0 | 2,220 ft |
| September | 74.9 | 1,219 ft | 86.2 | 1,926 ft |
| October | 64.2 | 532 ft | 76.1 | 1,295 ft |
| November | 53.0 | −205 ft | 63.2 | 467 ft |
| December | 44.9 | −751 ft | 53.3 | −185 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 7M1
DENSITY ALTITUDE
Field elevation 141 ft — the air behaves like 2,220 ft.
- PRESSURE ALT
- 142 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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Frequently asked questions
How high does density altitude get at 7M1 in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Mc Gehee Municipal reaches roughly 2,220 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 7M1 on an average day?
It swings with the seasons: from roughly −922 ft at the coldest month's average temperature to about 1,628 ft at the warmest month's — all from a constant field elevation of 141 ft. The month-by-month table above carries the full year.
What is the field elevation of Mc Gehee Municipal?
141 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7M1 (FAA), in Mc Gehee, Arkansas.