Romeo, Michigan · field elev 738 ft
Density Altitude at Romeo State (D98)
Romeo State sits at 738 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,456 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 | 23.2 | −1,519 ft | 30.1 | −1,030 ft |
| February | 24.4 | −1,433 ft | 32.8 | −841 ft |
| March | 33.5 | −792 ft | 42.1 | −200 ft |
| April | 45.8 | 51 ft | 56.2 | 745 ft |
| May | 57.9 | 857 ft | 68.5 | 1,544 ft |
| June | 68.0 | 1,512 ft | 78.4 | 2,170 ft |
| July | 72.5 | 1,799 ft | 83.0 | 2,456 ft |
| August | 69.7 | 1,621 ft | 80.0 | 2,270 ft |
| September | 62.5 | 1,157 ft | 73.1 | 1,837 ft |
| October | 50.7 | 380 ft | 60.3 | 1,014 ft |
| November | 39.1 | −405 ft | 46.5 | 99 ft |
| December | 29.3 | −1,086 ft | 35.4 | −660 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 D98
DENSITY ALTITUDE
Field elevation 738 ft — the air behaves like 2,456 ft.
- PRESSURE ALT
- 739 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
- 57D — Ray Community
Ray · elev 632 ft
- 2E2 — Sharpe'S Strip
Emmett · elev 781 ft
- D99 — Robertson Field
Richmond · elev 650 ft
- 76G — Marine City
Marine City · elev 614 ft
- KVLL — Oakland/Troy
Troy · elev 727 ft
- 39G — Avoca
Avoca · elev 726 ft
- D20 — Yale
Yale · elev 815 ft
- KPHN — St Clair County International
Port Huron · elev 650 ft
Frequently asked questions
How high does density altitude get at D98 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Romeo State reaches roughly 2,456 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 D98 on an average day?
It swings with the seasons: from roughly −1,519 ft at the coldest month's average temperature to about 1,799 ft at the warmest month's — all from a constant field elevation of 738 ft. The month-by-month table above carries the full year.
What is the field elevation of Romeo State?
738 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is D98 (FAA), in Romeo, Michigan.