Detroit/Grosse Ile, Michigan · field elev 591 ft
Density Altitude at Grosse Ile Municipal (KONZ)
Grosse Ile Municipal sits at 591 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,289 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 | 24.9 | −1,582 ft | 31.6 | −1,109 ft |
| February | 26.7 | −1,454 ft | 34.4 | −913 ft |
| March | 35.0 | −871 ft | 43.3 | −301 ft |
| April | 46.7 | −70 ft | 56.1 | 557 ft |
| May | 57.8 | 669 ft | 67.8 | 1,318 ft |
| June | 68.4 | 1,357 ft | 78.4 | 1,990 ft |
| July | 72.4 | 1,612 ft | 83.2 | 2,289 ft |
| August | 71.2 | 1,536 ft | 82.1 | 2,221 ft |
| September | 64.5 | 1,106 ft | 74.9 | 1,770 ft |
| October | 52.1 | 292 ft | 61.5 | 911 ft |
| November | 40.2 | −512 ft | 47.9 | 11 ft |
| December | 30.7 | −1,172 ft | 36.6 | −760 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 KONZ
DENSITY ALTITUDE
Field elevation 591 ft — the air behaves like 2,277 ft.
- PRESSURE ALT
- 592 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
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- KDTW — Detroit Metro Wayne County
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- KTTF — Custer
Monroe · elev 616 ft
- 43G — Belleville
Belleville · elev 695 ft
- KYIP — Willow Run
Detroit · elev 716 ft
- 1D2 — Canton-Plymouth-Mettetal
Plymouth · elev 696 ft
- KDET — Coleman A Young Municipal
Detroit · elev 624 ft
- KVLL — Oakland/Troy
Troy · elev 727 ft
Frequently asked questions
How high does density altitude get at KONZ in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Grosse Ile Municipal reaches roughly 2,289 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 KONZ on an average day?
It swings with the seasons: from roughly −1,582 ft at the coldest month's average temperature to about 1,612 ft at the warmest month's — all from a constant field elevation of 591 ft. The month-by-month table above carries the full year.
What is the field elevation of Grosse Ile Municipal?
591 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KONZ (ICAO) / ONZ (FAA), in Detroit/Grosse Ile, Michigan.