Columbus, Ohio · field elev 815 ft
Density Altitude at John Glenn Columbus International (KCMH)
John Glenn Columbus International sits at 815 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 2,698 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 | 29.6 | −969 ft | 37.1 | −447 ft |
| February | 32.5 | −766 ft | 40.8 | −193 ft |
| March | 41.6 | −138 ft | 51.1 | 503 ft |
| April | 53.2 | 642 ft | 64.1 | 1,356 ft |
| May | 63.3 | 1,304 ft | 74.1 | 1,994 ft |
| June | 71.9 | 1,855 ft | 82.2 | 2,501 ft |
| July | 75.4 | 2,076 ft | 85.4 | 2,698 ft |
| August | 74.0 | 1,988 ft | 84.1 | 2,618 ft |
| September | 67.2 | 1,555 ft | 77.8 | 2,227 ft |
| October | 55.2 | 774 ft | 65.5 | 1,446 ft |
| November | 43.6 | −2 ft | 52.3 | 582 ft |
| December | 34.5 | −627 ft | 41.5 | −145 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 KCMH
DENSITY ALTITUDE
Field elevation 815 ft — the air behaves like 2,674 ft.
- PRESSURE ALT
- 816 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 Ohio fields
- KOSU — Ohio State University
Columbus · elev 906 ft
- KLCK — Rickenbacker International
Columbus · elev 744 ft
- KTZR — Bolton Field
Columbus · elev 904 ft
- 7B4 — Miller Farm Landing Strip
Baltimore · elev 930 ft
- KLHQ — Fairfield County
Lancaster · elev 868 ft
- 6CM — Chapman Meml Field
Centerburg · elev 1,180 ft
- KDLZ — Delaware Municipal/Jim Moore Field
Delaware · elev 945 ft
- KVTA — Licking County Regional
Newark · elev 884 ft
Frequently asked questions
How high does density altitude get at KCMH in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at John Glenn Columbus International reaches roughly 2,698 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 KCMH on an average day?
It swings with the seasons: from roughly −969 ft at the coldest month's average temperature to about 2,076 ft at the warmest month's — all from a constant field elevation of 815 ft. The month-by-month table above carries the full year.
What is the field elevation of John Glenn Columbus International?
815 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KCMH (ICAO) / CMH (FAA), in Columbus, Ohio.