Marshall, Michigan · field elev 941 ft
Density Altitude at Brooks Field (KRMY)
Brooks Field sits at 941 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,704 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 | 24.3 | −1,186 ft | 31.3 | −692 ft |
| February | 26.4 | −1,037 ft | 34.1 | −497 ft |
| March | 36.3 | −345 ft | 45.4 | 276 ft |
| April | 48.0 | 451 ft | 58.6 | 1,153 ft |
| May | 59.4 | 1,206 ft | 70.1 | 1,895 ft |
| June | 68.9 | 1,819 ft | 79.4 | 2,481 ft |
| July | 72.5 | 2,047 ft | 83.0 | 2,704 ft |
| August | 70.8 | 1,940 ft | 80.9 | 2,574 ft |
| September | 63.5 | 1,472 ft | 74.0 | 2,142 ft |
| October | 51.6 | 692 ft | 61.2 | 1,323 ft |
| November | 39.8 | −104 ft | 47.3 | 404 ft |
| December | 30.0 | −783 ft | 36.3 | −345 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 KRMY
DENSITY ALTITUDE
Field elevation 941 ft — the air behaves like 2,704 ft.
- PRESSURE ALT
- 942 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
- KBTL — Battle Creek Exec At Kellogg Field
Battle Creek · elev 952 ft
- KOEB — Branch County Meml
Coldwater · elev 958 ft
- 49G — Wend Valley
Charlotte · elev 859 ft
- KFPK — Fitch H Beach
Charlotte · elev 891 ft
- KJXN — Jackson County/Reynolds Field
Jackson · elev 1,001 ft
- 60G — Skyway Estates
Eaton Rapids · elev 931 ft
- KJYM — Hillsdale Municipal
Hillsdale · elev 1,184 ft
- KAZO — Kalamazoo/Battle Creek International
Kalamazoo · elev 874 ft
Frequently asked questions
How high does density altitude get at KRMY in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Brooks Field reaches roughly 2,704 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 KRMY on an average day?
It swings with the seasons: from roughly −1,186 ft at the coldest month's average temperature to about 2,047 ft at the warmest month's — all from a constant field elevation of 941 ft. The month-by-month table above carries the full year.
What is the field elevation of Brooks Field?
941 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRMY (ICAO) / RMY (FAA), in Marshall, Michigan.