Interlochen, Michigan · field elev 866 ft
Density Altitude at Green Lake (Y88)
Green Lake sits at 866 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 2,389 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 | 21.6 | −1,473 ft | 27.8 | −1,032 ft |
| February | 21.9 | −1,451 ft | 29.7 | −898 ft |
| March | 30.0 | −877 ft | 39.4 | −225 ft |
| April | 41.3 | −95 ft | 51.9 | 619 ft |
| May | 53.7 | 738 ft | 65.1 | 1,483 ft |
| June | 63.9 | 1,405 ft | 75.0 | 2,113 ft |
| July | 68.9 | 1,727 ft | 79.4 | 2,389 ft |
| August | 67.5 | 1,637 ft | 77.7 | 2,283 ft |
| September | 60.2 | 1,165 ft | 70.6 | 1,835 ft |
| October | 48.2 | 372 ft | 57.3 | 976 ft |
| November | 36.8 | −404 ft | 43.9 | 82 ft |
| December | 27.4 | −1,060 ft | 33.3 | −646 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 Y88
DENSITY ALTITUDE
Field elevation 866 ft — the air behaves like 2,364 ft.
- PRESSURE ALT
- 867 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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- KTVC — Cherry Capital
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- Y87 — William B Bolton
Empire · elev 944 ft
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Harrietta · elev 993 ft
- KFKS — Frankfort Dow Meml Field
Frankfort · elev 633 ft
- KCAD — Wexford County
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- Y89 — Kalkaska City
Kalkaska · elev 1,029 ft
Frequently asked questions
How high does density altitude get at Y88 in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Green Lake reaches roughly 2,389 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 Y88 on an average day?
It swings with the seasons: from roughly −1,473 ft at the coldest month's average temperature to about 1,727 ft at the warmest month's — all from a constant field elevation of 866 ft. The month-by-month table above carries the full year.
What is the field elevation of Green Lake?
866 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is Y88 (FAA), in Interlochen, Michigan.