Oakley, Michigan · field elev 727 ft
Density Altitude at Tkaczyk Field (C88)
Tkaczyk Field sits at 727 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,375 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 | −1,547 ft | 30.3 | −1,030 ft |
| February | 24.7 | −1,426 ft | 33.1 | −834 ft |
| March | 33.6 | −799 ft | 43.3 | −132 ft |
| April | 45.5 | 17 ft | 56.5 | 751 ft |
| May | 57.4 | 811 ft | 68.7 | 1,543 ft |
| June | 67.0 | 1,434 ft | 78.1 | 2,138 ft |
| July | 70.8 | 1,677 ft | 81.9 | 2,375 ft |
| August | 69.3 | 1,581 ft | 80.0 | 2,257 ft |
| September | 62.3 | 1,131 ft | 73.5 | 1,848 ft |
| October | 50.3 | 340 ft | 60.6 | 1,020 ft |
| November | 38.8 | −439 ft | 47.0 | 119 ft |
| December | 29.0 | −1,121 ft | 35.5 | −667 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 C88
DENSITY ALTITUDE
Field elevation 727 ft — the air behaves like 2,381 ft.
- PRESSURE ALT
- 728 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 C88 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Tkaczyk Field reaches roughly 2,375 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 C88 on an average day?
It swings with the seasons: from roughly −1,547 ft at the coldest month's average temperature to about 1,677 ft at the warmest month's — all from a constant field elevation of 727 ft. The month-by-month table above carries the full year.
What is the field elevation of Tkaczyk Field?
727 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is C88 (FAA), in Oakley, Michigan.