Alma, Michigan · field elev 754 ft
Density Altitude at Gratiot Community (KAMN)
Gratiot Community sits at 754 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,426 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 | 22.0 | −1,585 ft | 29.1 | −1,080 ft |
| February | 23.7 | −1,463 ft | 32.0 | −877 ft |
| March | 33.0 | −807 ft | 42.6 | −146 ft |
| April | 45.2 | 31 ft | 55.9 | 745 ft |
| May | 57.0 | 818 ft | 68.5 | 1,564 ft |
| June | 66.9 | 1,461 ft | 78.1 | 2,171 ft |
| July | 70.8 | 1,710 ft | 82.2 | 2,426 ft |
| August | 69.0 | 1,595 ft | 80.1 | 2,296 ft |
| September | 61.3 | 1,099 ft | 72.9 | 1,844 ft |
| October | 49.7 | 333 ft | 60.0 | 1,014 ft |
| November | 37.7 | −481 ft | 45.8 | 71 ft |
| December | 28.2 | −1,144 ft | 34.5 | −703 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 KAMN
DENSITY ALTITUDE
Field elevation 754 ft — the air behaves like 2,414 ft.
- PRESSURE ALT
- 755 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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- 39T — Tripp Creek
St Johns · elev 717 ft
- 4M4 — Shady Lawn Field
Bannister · elev 683 ft
- KMOP — Mount Pleasant Municipal
Mount Pleasant · elev 755 ft
- 53W — Woodruff Lake
Winn · elev 938 ft
- 97G — Glowacki
St Johns · elev 775 ft
- C57 — Millers Landing
Elsie · elev 757 ft
Frequently asked questions
How high does density altitude get at KAMN in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Gratiot Community reaches roughly 2,426 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 KAMN on an average day?
It swings with the seasons: from roughly −1,585 ft at the coldest month's average temperature to about 1,710 ft at the warmest month's — all from a constant field elevation of 754 ft. The month-by-month table above carries the full year.
What is the field elevation of Gratiot Community?
754 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KAMN (ICAO) / AMN (FAA), in Alma, Michigan.