Washington Court House, Ohio · field elev 980 ft
Density Altitude at Fayette County (I23)
Fayette County sits at 980 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,782 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 | 27.8 | −889 ft | 36.0 | −317 ft |
| February | 30.9 | −672 ft | 39.9 | −49 ft |
| March | 39.9 | −49 ft | 50.2 | 647 ft |
| April | 51.6 | 740 ft | 63.8 | 1,539 ft |
| May | 61.8 | 1,410 ft | 73.0 | 2,127 ft |
| June | 70.1 | 1,943 ft | 80.7 | 2,609 ft |
| July | 73.2 | 2,140 ft | 83.5 | 2,782 ft |
| August | 71.7 | 2,045 ft | 82.3 | 2,708 ft |
| September | 65.5 | 1,649 ft | 77.2 | 2,391 ft |
| October | 54.0 | 899 ft | 65.7 | 1,662 ft |
| November | 41.9 | 88 ft | 51.8 | 753 ft |
| December | 32.9 | −532 ft | 40.7 | 6 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 I23
DENSITY ALTITUDE
Field elevation 980 ft — the air behaves like 2,813 ft.
- PRESSURE ALT
- 981 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
- 2B6 — Hollister Field
Wilmington · elev 1,090 ft
- KILN — Wilmington Air Park
Wilmington · elev 1,077 ft
- KRZT — Ross County
Chillicothe · elev 725 ft
- KCYO — Pickaway County Meml
Circleville · elev 685 ft
- I66 — Clinton Field
Wilmington · elev 1,033 ft
- KUYF — Madison County
London · elev 1,082 ft
- KHOC — Highland County
Hillsboro · elev 977 ft
- KTZR — Bolton Field
Columbus · elev 904 ft
Frequently asked questions
How high does density altitude get at I23 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Fayette County reaches roughly 2,782 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 I23 on an average day?
It swings with the seasons: from roughly −889 ft at the coldest month's average temperature to about 2,140 ft at the warmest month's — all from a constant field elevation of 980 ft. The month-by-month table above carries the full year.
What is the field elevation of Fayette County?
980 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is I23 (FAA), in Washington Court House, Ohio.