Defiance, Ohio · field elev 707 ft
Density Altitude at Defiance Meml (KDFI)
Defiance Meml sits at 707 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,462 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 | 25.2 | −1,415 ft | 32.3 | −915 ft |
| February | 27.8 | −1,231 ft | 35.5 | −692 ft |
| March | 37.4 | −561 ft | 46.5 | 60 ft |
| April | 49.2 | 242 ft | 59.9 | 950 ft |
| May | 60.0 | 956 ft | 70.9 | 1,659 ft |
| June | 69.5 | 1,570 ft | 80.1 | 2,238 ft |
| July | 72.9 | 1,786 ft | 83.7 | 2,462 ft |
| August | 70.8 | 1,653 ft | 81.5 | 2,325 ft |
| September | 63.9 | 1,210 ft | 75.3 | 1,938 ft |
| October | 52.3 | 449 ft | 62.7 | 1,132 ft |
| November | 40.6 | −341 ft | 48.7 | 208 ft |
| December | 30.3 | −1,055 ft | 36.9 | −595 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 KDFI
DENSITY ALTITUDE
Field elevation 707 ft — the air behaves like 2,480 ft.
- PRESSURE ALT
- 708 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
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Deshler · elev 706 ft
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- KVNW — Van Wert County
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- KTOL — Eugene F Kranz Toledo Express
Toledo · elev 684 ft
Frequently asked questions
How high does density altitude get at KDFI in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Defiance Meml reaches roughly 2,462 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 KDFI on an average day?
It swings with the seasons: from roughly −1,415 ft at the coldest month's average temperature to about 1,786 ft at the warmest month's — all from a constant field elevation of 707 ft. The month-by-month table above carries the full year.
What is the field elevation of Defiance Meml?
707 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KDFI (ICAO) / DFI (FAA), in Defiance, Ohio.