Salem, Illinois · field elev 573 ft

Density Altitude at Salem-Leckrone (KSLO)

Salem-Leckrone sits at 573 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,551 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,551 ft station: SALEM · 1 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at SALEM (1 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 29.6 −1,272 ft 38.4 −659 ft
February 33.7 −984 ft 43.4 −316 ft
March 43.5 −309 ft 54.0 396 ft
April 55.0 462 ft 66.2 1,193 ft
May 65.2 1,129 ft 75.7 1,799 ft
June 74.2 1,704 ft 84.5 2,348 ft
July 77.6 1,918 ft 87.8 2,551 ft
August 75.9 1,811 ft 86.6 2,477 ft
September 68.6 1,348 ft 80.4 2,093 ft
October 56.9 588 ft 68.7 1,354 ft
November 44.1 −269 ft 54.3 416 ft
December 34.2 −949 ft 42.8 −357 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 KSLO

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,563 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,563 ft

Field elevation 573 ft — the air behaves like 2,563 ft.

PRESSURE ALT
574 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 KSLO in summer?

On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Salem-Leckrone reaches roughly 2,551 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 KSLO on an average day?

It swings with the seasons: from roughly −1,272 ft at the coldest month's average temperature to about 1,918 ft at the warmest month's — all from a constant field elevation of 573 ft. The month-by-month table above carries the full year.

What is the field elevation of Salem-Leckrone?

573 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSLO (ICAO) / SLO (FAA), in Salem, Illinois.