Chicago/Romeoville, Illinois · field elev 679 ft

Density Altitude at Lewis University (KLOT)

Lewis University sits at 679 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 2,489 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,489 ft station: ROMEOVILLE WFO · 1 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at ROMEOVILLE WFO (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 23.9 −1,543 ft 31.7 −992 ft
February 28.0 −1,252 ft 36.3 −671 ft
March 39.1 −478 ft 48.5 160 ft
April 50.3 281 ft 61.0 987 ft
May 61.4 1,013 ft 72.4 1,720 ft
June 70.9 1,625 ft 81.5 2,291 ft
July 74.6 1,859 ft 84.7 2,489 ft
August 72.8 1,745 ft 82.7 2,366 ft
September 65.9 1,304 ft 76.4 1,973 ft
October 53.7 507 ft 63.8 1,169 ft
November 40.4 −389 ft 48.9 187 ft
December 29.4 −1,153 ft 36.8 −637 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 KLOT

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,508 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,508 ft

Field elevation 679 ft — the air behaves like 2,508 ft.

PRESSURE ALT
680 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

Nearby Illinois fields

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Frequently asked questions

How high does density altitude get at KLOT in summer?

On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Lewis University reaches roughly 2,489 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 KLOT on an average day?

It swings with the seasons: from roughly −1,543 ft at the coldest month's average temperature to about 1,859 ft at the warmest month's — all from a constant field elevation of 679 ft. The month-by-month table above carries the full year.

What is the field elevation of Lewis University?

679 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLOT (ICAO) / LOT (FAA), in Chicago/Romeoville, Illinois.