Dayton, Ohio · field elev 1,009 ft
Density Altitude at James M Cox Dayton International (KDAY)
James M Cox Dayton International sits at 1,009 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,965 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 | 29.4 | −740 ft | 37.1 | −205 ft |
| February | 32.8 | −503 ft | 41.2 | 76 ft |
| March | 42.1 | 137 ft | 51.5 | 769 ft |
| April | 53.7 | 915 ft | 64.5 | 1,620 ft |
| May | 64.0 | 1,588 ft | 74.2 | 2,238 ft |
| June | 72.7 | 2,143 ft | 82.6 | 2,762 ft |
| July | 76.0 | 2,351 ft | 85.9 | 2,965 ft |
| August | 74.5 | 2,257 ft | 84.6 | 2,886 ft |
| September | 67.7 | 1,826 ft | 78.6 | 2,514 ft |
| October | 56.0 | 1,067 ft | 66.2 | 1,729 ft |
| November | 44.1 | 273 ft | 52.7 | 849 ft |
| December | 34.3 | −399 ft | 41.5 | 96 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 KDAY
DENSITY ALTITUDE
Field elevation 1,009 ft — the air behaves like 2,972 ft.
- PRESSURE ALT
- 1,010 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
- 1WF — Waco Field
Troy · elev 817 ft
- 3I7 — Dayton/Phillipsburg
Dayton · elev 1,028 ft
- I44 — Dahio Trotwood
Dayton · elev 925 ft
- I73 — Moraine Air Park
Dayton · elev 720 ft
- I17 — Piqua/Hartzell Field
Piqua · elev 993 ft
- KGDK — Greene County/Lewis A Jackson Regional
Dayton · elev 949 ft
- KSGH — Springfield/Beckley Municipal
Springfield · elev 1,051 ft
- KMGY — Dayton/Wright Brothers
Dayton · elev 957 ft
Frequently asked questions
How high does density altitude get at KDAY in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at James M Cox Dayton International reaches roughly 2,965 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 KDAY on an average day?
It swings with the seasons: from roughly −740 ft at the coldest month's average temperature to about 2,351 ft at the warmest month's — all from a constant field elevation of 1,009 ft. The month-by-month table above carries the full year.
What is the field elevation of James M Cox Dayton International?
1,009 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KDAY (ICAO) / DAY (FAA), in Dayton, Ohio.