Ludington, Michigan · field elev 647 ft

Density Altitude at Mason County (KLDM)

Mason County sits at 647 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 2,096 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,096 ft station: LUDINGTON 4 SE · 4 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at LUDINGTON 4 SE (4 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 23.1 −1,640 ft 29.2 −1,207 ft
February 24.9 −1,512 ft 32.3 −990 ft
March 32.6 −969 ft 41.2 −374 ft
April 43.6 −211 ft 54.2 501 ft
May 55.0 554 ft 66.7 1,317 ft
June 63.9 1,136 ft 75.5 1,877 ft
July 68.3 1,419 ft 79.0 2,096 ft
August 67.0 1,336 ft 77.7 2,015 ft
September 60.3 902 ft 70.6 1,566 ft
October 48.4 114 ft 57.4 712 ft
November 37.6 −622 ft 44.8 −129 ft
December 27.8 −1,306 ft 33.5 −906 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 KLDM

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,096 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,096 ft

Field elevation 647 ft — the air behaves like 2,096 ft.

PRESSURE ALT
648 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 KLDM in summer?

On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Mason County reaches roughly 2,096 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 KLDM on an average day?

It swings with the seasons: from roughly −1,640 ft at the coldest month's average temperature to about 1,419 ft at the warmest month's — all from a constant field elevation of 647 ft. The month-by-month table above carries the full year.

What is the field elevation of Mason County?

647 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLDM (ICAO) / LDM (FAA), in Ludington, Michigan.