Decorah, Iowa · field elev 1,158 ft

Density Altitude at Decorah Municipal (KDEH)

Decorah Municipal sits at 1,158 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 3,055 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈3,055 ft station: DECORAH · 3 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at DECORAH (3 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 19.0 −1,293 ft 27.7 −674 ft
February 23.4 −978 ft 32.8 −317 ft
March 36.0 −95 ft 46.2 599 ft
April 49.3 807 ft 61.3 1,597 ft
May 60.5 1,545 ft 72.5 2,313 ft
June 70.0 2,155 ft 81.4 2,870 ft
July 73.5 2,377 ft 84.4 3,055 ft
August 71.7 2,263 ft 82.7 2,950 ft
September 64.4 1,797 ft 76.4 2,559 ft
October 51.8 973 ft 63.2 1,720 ft
November 37.5 8 ft 46.6 626 ft
December 25.2 −850 ft 32.9 −310 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 KDEH

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 3,030 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 3,030 ft

Field elevation 1,158 ft — the air behaves like 3,030 ft.

PRESSURE ALT
1,159 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 KDEH in summer?

On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Decorah Municipal reaches roughly 3,055 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 KDEH on an average day?

It swings with the seasons: from roughly −1,293 ft at the coldest month's average temperature to about 2,377 ft at the warmest month's — all from a constant field elevation of 1,158 ft. The month-by-month table above carries the full year.

What is the field elevation of Decorah Municipal?

1,158 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KDEH (ICAO) / DEH (FAA), in Decorah, Iowa.