Wilmington, Ohio · field elev 1,033 ft

Density Altitude at Clinton Field (I66)

Clinton Field sits at 1,033 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,872 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,872 ft station: WILMINGTON 3 N · 2 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at WILMINGTON 3 N (2 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 28.3 −788 ft 36.5 −216 ft
February 30.9 −605 ft 39.9 17 ft
March 40.0 24 ft 50.0 699 ft
April 51.4 792 ft 63.0 1,553 ft
May 62.0 1,488 ft 72.8 2,179 ft
June 70.7 2,046 ft 81.1 2,699 ft
July 73.2 2,204 ft 83.9 2,872 ft
August 71.5 2,097 ft 83.1 2,822 ft
September 65.3 1,701 ft 77.8 2,493 ft
October 54.0 965 ft 65.8 1,733 ft
November 42.3 181 ft 52.2 845 ft
December 33.5 −424 ft 41.1 99 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 I66

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,878 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,878 ft

Field elevation 1,033 ft — the air behaves like 2,878 ft.

PRESSURE ALT
1,034 ft
ISA DEVIATION
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RULE-OF-THUMB DA
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AIR DENSITY INDEX
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AIR DENSITY
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WATER · GRAINS/LB
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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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Frequently asked questions

How high does density altitude get at I66 in summer?

On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Clinton Field reaches roughly 2,872 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 I66 on an average day?

It swings with the seasons: from roughly −788 ft at the coldest month's average temperature to about 2,204 ft at the warmest month's — all from a constant field elevation of 1,033 ft. The month-by-month table above carries the full year.

What is the field elevation of Clinton Field?

1,033 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is I66 (FAA), in Wilmington, Ohio.