Millersburg, Ohio · field elev 1,227 ft
Density Altitude at Holmes County (10G)
Holmes County sits at 1,227 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 3,096 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 | 26.8 | −651 ft | 35.5 | −44 ft |
| February | 29.1 | −489 ft | 39.0 | 197 ft |
| March | 37.9 | 121 ft | 48.9 | 866 ft |
| April | 49.3 | 893 ft | 62.1 | 1,733 ft |
| May | 59.5 | 1,565 ft | 72.0 | 2,366 ft |
| June | 68.3 | 2,132 ft | 80.3 | 2,886 ft |
| July | 72.0 | 2,366 ft | 83.7 | 3,096 ft |
| August | 70.4 | 2,265 ft | 82.3 | 3,010 ft |
| September | 63.5 | 1,824 ft | 76.2 | 2,631 ft |
| October | 52.1 | 1,079 ft | 64.6 | 1,895 ft |
| November | 41.1 | 340 ft | 51.6 | 1,046 ft |
| December | 32.0 | −286 ft | 40.4 | 292 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 10G
DENSITY ALTITUDE
Field elevation 1,227 ft — the air behaves like 3,114 ft.
- PRESSURE ALT
- 1,228 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
- I40 — Richard Downing
Coshocton · elev 979 ft
- 2D7 — Beach City
Beach City · elev 984 ft
- 80G — Tri-City
West Lafayette · elev 844 ft
- KBJJ — Wayne County
Wooster · elev 1,136 ft
- KPHD — Harry Clever Field
New Philadelphia · elev 894 ft
- 3G4 — Ashland County
Ashland · elev 1,207 ft
- 6G4 — Wynkoop
Mount Vernon · elev 1,041 ft
- 4I3 — Knox County
Mount Vernon · elev 1,192 ft
Frequently asked questions
How high does density altitude get at 10G in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Holmes County reaches roughly 3,096 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 10G on an average day?
It swings with the seasons: from roughly −651 ft at the coldest month's average temperature to about 2,366 ft at the warmest month's — all from a constant field elevation of 1,227 ft. The month-by-month table above carries the full year.
What is the field elevation of Holmes County?
1,227 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 10G (FAA), in Millersburg, Ohio.