Croswell, Michigan · field elev 784 ft
Density Altitude at Arnold Field (55G)
Arnold Field sits at 784 ft, and even a typical July afternoon (78 °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 | 23.0 | −1,476 ft | 29.9 | −987 ft |
| February | 24.1 | −1,397 ft | 32.0 | −839 ft |
| March | 32.0 | −839 ft | 40.1 | −279 ft |
| April | 42.6 | −108 ft | 51.6 | 497 ft |
| May | 53.8 | 644 ft | 63.0 | 1,246 ft |
| June | 63.9 | 1,305 ft | 72.9 | 1,880 ft |
| July | 69.2 | 1,645 ft | 78.3 | 2,220 ft |
| August | 68.6 | 1,607 ft | 77.6 | 2,176 ft |
| September | 62.3 | 1,201 ft | 71.9 | 1,817 ft |
| October | 50.6 | 431 ft | 59.1 | 992 ft |
| November | 39.2 | −341 ft | 46.5 | 156 ft |
| December | 29.2 | −1,036 ft | 35.2 | −617 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 55G
DENSITY ALTITUDE
Field elevation 784 ft — the air behaves like 2,201 ft.
- PRESSURE ALT
- 785 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
- 4Y8 — Para Field
Yale · elev 800 ft
- 96G — Cowley Field
Sandusky · elev 770 ft
- D20 — Yale
Yale · elev 815 ft
- Y83 — Sandusky City
Sandusky · elev 777 ft
- 39G — Avoca
Avoca · elev 726 ft
- 55D — Burgess Field
Brown City · elev 827 ft
- 77G — Marlette Township
Marlette · elev 895 ft
- 2E2 — Sharpe'S Strip
Emmett · elev 781 ft
Frequently asked questions
How high does density altitude get at 55G in summer?
On a typical July afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Arnold Field 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 55G on an average day?
It swings with the seasons: from roughly −1,476 ft at the coldest month's average temperature to about 1,645 ft at the warmest month's — all from a constant field elevation of 784 ft. The month-by-month table above carries the full year.
What is the field elevation of Arnold Field?
784 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 55G (FAA), in Croswell, Michigan.