Dayton, Ohio · field elev 949 ft

Density Altitude at Greene County/Lewis A Jackson Regional (KGDK)

Greene County/Lewis A Jackson Regional sits at 949 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,738 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,738 ft station: XENIA 6 SSE · 8 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at XENIA 6 SSE (8 mi from the field) · standard pressure, dry air
Month Avg temp °F DA at avg temp Afternoon high °F DA on a typical afternoon
January 30.2 −759 ft 37.6 −245 ft
February 33.5 −529 ft 41.7 35 ft
March 42.7 103 ft 51.9 722 ft
April 54.1 867 ft 64.8 1,566 ft
May 63.5 1,482 ft 73.4 2,114 ft
June 71.4 1,988 ft 80.8 2,578 ft
July 74.1 2,158 ft 83.4 2,738 ft
August 72.5 2,057 ft 82.2 2,664 ft
September 66.6 1,681 ft 77.1 2,347 ft
October 55.9 986 ft 66.1 1,649 ft
November 44.6 232 ft 53.3 814 ft
December 34.9 −432 ft 42.0 56 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 KGDK

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,714 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,714 ft

Field elevation 949 ft — the air behaves like 2,714 ft.

PRESSURE ALT
950 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

All Ohio airports →

Frequently asked questions

How high does density altitude get at KGDK in summer?

On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Greene County/Lewis A Jackson Regional reaches roughly 2,738 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 KGDK on an average day?

It swings with the seasons: from roughly −759 ft at the coldest month's average temperature to about 2,158 ft at the warmest month's — all from a constant field elevation of 949 ft. The month-by-month table above carries the full year.

What is the field elevation of Greene County/Lewis A Jackson Regional?

949 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGDK (ICAO) / GDK (FAA), in Dayton, Ohio.