Zeeland, Michigan · field elev 756 ft
Density Altitude at Ottawa Exec (Z98)
Ottawa Exec sits at 756 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,398 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 | 25.9 | −1,304 ft | 31.8 | −888 ft |
| February | 27.4 | −1,198 ft | 34.3 | −714 ft |
| March | 36.0 | −596 ft | 44.4 | −21 ft |
| April | 47.1 | 161 ft | 56.8 | 807 ft |
| May | 58.3 | 905 ft | 68.6 | 1,572 ft |
| June | 67.9 | 1,528 ft | 78.1 | 2,173 ft |
| July | 71.6 | 1,764 ft | 81.7 | 2,398 ft |
| August | 70.0 | 1,662 ft | 80.2 | 2,304 ft |
| September | 62.9 | 1,205 ft | 73.5 | 1,884 ft |
| October | 51.7 | 469 ft | 60.8 | 1,069 ft |
| November | 40.7 | −273 ft | 47.6 | 195 ft |
| December | 31.5 | −909 ft | 36.9 | −534 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 Z98
DENSITY ALTITUDE
Field elevation 756 ft — the air behaves like 2,416 ft.
- PRESSURE ALT
- 757 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
- 08C — Riverview
Jenison · elev 603 ft
- KBIV — West Michigan Regional
Holland · elev 698 ft
- 41C — Calkins Field
Wayland · elev 740 ft
- 73G — Cherry Field
Nunica · elev 629 ft
- 3GM — Grand Haven Meml Airpark
Grand Haven · elev 604 ft
- 35D — Padgham Field
Allegan · elev 706 ft
- KGRR — Gerald R Ford International
Grand Rapids · elev 794 ft
- 5N7 — Hat Field
Nunica · elev 625 ft
Frequently asked questions
How high does density altitude get at Z98 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Ottawa Exec reaches roughly 2,398 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 Z98 on an average day?
It swings with the seasons: from roughly −1,304 ft at the coldest month's average temperature to about 1,764 ft at the warmest month's — all from a constant field elevation of 756 ft. The month-by-month table above carries the full year.
What is the field elevation of Ottawa Exec?
756 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is Z98 (FAA), in Zeeland, Michigan.