Lake City, Michigan · field elev 1,246 ft
Density Altitude at Home Acres Sky Ranch (Y91)
Home Acres Sky Ranch sits at 1,246 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,915 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 | 18.6 | −1,211 ft | 27.3 | −592 ft |
| February | 19.9 | −1,118 ft | 30.3 | −381 ft |
| March | 28.9 | −479 ft | 40.5 | 323 ft |
| April | 41.3 | 377 ft | 53.2 | 1,175 ft |
| May | 53.6 | 1,201 ft | 66.3 | 2,027 ft |
| June | 63.4 | 1,841 ft | 76.2 | 2,654 ft |
| July | 67.5 | 2,104 ft | 80.4 | 2,915 ft |
| August | 65.7 | 1,989 ft | 78.6 | 2,804 ft |
| September | 57.9 | 1,484 ft | 71.1 | 2,333 ft |
| October | 46.1 | 702 ft | 57.3 | 1,444 ft |
| November | 34.8 | −68 ft | 43.4 | 520 ft |
| December | 25.0 | −754 ft | 32.6 | −221 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 Y91
DENSITY ALTITUDE
Field elevation 1,246 ft — the air behaves like 2,891 ft.
- PRESSURE ALT
- 1,247 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
- KCAD — Wexford County
Cadillac · elev 1,307 ft
- 6Y0 — Moorestown Airpark
Moorestown · elev 1,211 ft
- 5Y2 — Houghton Lake State
Houghton Lake Heights · elev 1,165 ft
- KHTL — Roscommon County/Blodgett Meml
Houghton Lake · elev 1,150 ft
- 80D — Clare County
Harrison · elev 1,142 ft
- Y89 — Kalkaska City
Kalkaska · elev 1,029 ft
- 4Y9 — Eagles Landing
Harrietta · elev 993 ft
- 9C8 — Evart Municipal
Evart · elev 1,020 ft
Frequently asked questions
How high does density altitude get at Y91 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Home Acres Sky Ranch reaches roughly 2,915 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 Y91 on an average day?
It swings with the seasons: from roughly −1,211 ft at the coldest month's average temperature to about 2,104 ft at the warmest month's — all from a constant field elevation of 1,246 ft. The month-by-month table above carries the full year.
What is the field elevation of Home Acres Sky Ranch?
1,246 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is Y91 (FAA), in Lake City, Michigan.