Gregory, Michigan · field elev 921 ft
Density Altitude at Richmond Field (69G)
Richmond Field sits at 921 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,581 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 | 22.9 | −1,311 ft | 31.5 | −703 ft |
| February | 25.4 | −1,133 ft | 34.6 | −487 ft |
| March | 34.0 | −529 ft | 44.4 | 184 ft |
| April | 46.5 | 326 ft | 57.8 | 1,076 ft |
| May | 58.6 | 1,129 ft | 70.2 | 1,877 ft |
| June | 67.3 | 1,692 ft | 78.3 | 2,388 ft |
| July | 70.1 | 1,871 ft | 81.4 | 2,581 ft |
| August | 69.4 | 1,826 ft | 80.5 | 2,525 ft |
| September | 62.2 | 1,363 ft | 74.1 | 2,124 ft |
| October | 49.8 | 547 ft | 60.7 | 1,266 ft |
| November | 39.2 | −170 ft | 47.8 | 413 ft |
| December | 29.2 | −865 ft | 36.4 | −363 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 69G
DENSITY ALTITUDE
Field elevation 921 ft — the air behaves like 2,556 ft.
- PRESSURE ALT
- 922 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
- KOZW — Livingston County/Spencer J Hardy
Howell · elev 962 ft
- 45G — Brighton
Brighton · elev 973 ft
- 75G — Rossettie
Manchester · elev 1,005 ft
- 26W — Wolf Lake
Napoleon · elev 980 ft
- 65G — Maple Grove
Fowlerville · elev 906 ft
- KTEW — Mason Jewett Field
Mason · elev 919 ft
- 3NP — Napoleon
Napoleon · elev 963 ft
- KARB — Ann Arbor Municipal
Ann Arbor · elev 839 ft
Frequently asked questions
How high does density altitude get at 69G in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Richmond Field reaches roughly 2,581 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 69G on an average day?
It swings with the seasons: from roughly −1,311 ft at the coldest month's average temperature to about 1,871 ft at the warmest month's — all from a constant field elevation of 921 ft. The month-by-month table above carries the full year.
What is the field elevation of Richmond Field?
921 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 69G (FAA), in Gregory, Michigan.