Cheboygan, Michigan · field elev 677 ft
Density Altitude at Hoffman'S Black Mountain Aerodrome (2M7)
Hoffman'S Black Mountain Aerodrome sits at 677 ft, and even a typical July afternoon (80 °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 | 19.3 | −1,876 ft | 26.9 | −1,332 ft |
| February | 20.6 | −1,782 ft | 29.9 | −1,120 ft |
| March | 29.7 | −1,134 ft | 40.5 | −385 ft |
| April | 41.5 | −316 ft | 53.3 | 478 ft |
| May | 54.2 | 538 ft | 67.2 | 1,386 ft |
| June | 63.6 | 1,153 ft | 76.5 | 1,976 ft |
| July | 68.1 | 1,443 ft | 80.4 | 2,220 ft |
| August | 66.8 | 1,360 ft | 78.7 | 2,114 ft |
| September | 59.7 | 900 ft | 71.2 | 1,641 ft |
| October | 47.8 | 111 ft | 57.2 | 736 ft |
| November | 36.3 | −674 ft | 43.6 | −173 ft |
| December | 25.8 | −1,410 ft | 32.3 | −952 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 2M7
DENSITY ALTITUDE
Field elevation 677 ft — the air behaves like 2,195 ft.
- PRESSURE ALT
- 678 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 Michigan fields
- Y30 — Pbeaaye
Topinabee · elev 690 ft
- KSLH — Cheboygan County
Cheboygan · elev 640 ft
- Y65 — Campbell-Pratt
Indian River · elev 614 ft
- 6Y1 — Bois Blanc Island
Bois Blanc Island · elev 664 ft
- KPLN — Pellston Regional/Emmet County
Pellston · elev 721 ft
- KPZQ — Presque Isle County
Rogers City · elev 670 ft
- KMCD — Mackinac Island
Mackinac Island · elev 741 ft
- KMGN — Harbor Springs
Harbor Springs · elev 686 ft
Frequently asked questions
How high does density altitude get at 2M7 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Hoffman'S Black Mountain Aerodrome 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 2M7 on an average day?
It swings with the seasons: from roughly −1,876 ft at the coldest month's average temperature to about 1,443 ft at the warmest month's — all from a constant field elevation of 677 ft. The month-by-month table above carries the full year.
What is the field elevation of Hoffman'S Black Mountain Aerodrome?
677 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 2M7 (FAA), in Cheboygan, Michigan.