Manchester, Michigan · field elev 1,005 ft
Density Altitude at Rossettie (75G)
Rossettie sits at 1,005 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,782 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 | 23.3 | −1,177 ft | 31.4 | −605 ft |
| February | 25.3 | −1,035 ft | 34.9 | −362 ft |
| March | 35.2 | −341 ft | 45.3 | 349 ft |
| April | 46.8 | 450 ft | 58.3 | 1,213 ft |
| May | 58.4 | 1,219 ft | 70.1 | 1,974 ft |
| June | 67.5 | 1,808 ft | 79.0 | 2,534 ft |
| July | 71.2 | 2,044 ft | 83.0 | 2,782 ft |
| August | 69.9 | 1,961 ft | 81.0 | 2,658 ft |
| September | 62.6 | 1,492 ft | 74.6 | 2,258 ft |
| October | 50.7 | 711 ft | 61.9 | 1,447 ft |
| November | 38.9 | −86 ft | 47.7 | 510 ft |
| December | 29.4 | −745 ft | 36.5 | −251 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 75G
DENSITY ALTITUDE
Field elevation 1,005 ft — the air behaves like 2,782 ft.
- PRESSURE ALT
- 1,006 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 75G in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Rossettie reaches roughly 2,782 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 75G on an average day?
It swings with the seasons: from roughly −1,177 ft at the coldest month's average temperature to about 2,044 ft at the warmest month's — all from a constant field elevation of 1,005 ft. The month-by-month table above carries the full year.
What is the field elevation of Rossettie?
1,005 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 75G (FAA), in Manchester, Michigan.