Rayville, Louisiana · field elev 83 ft

Density Altitude at John H Hooks Jr Meml (M79)

John H Hooks Jr Meml sits at 83 ft, and even a typical August afternoon (94 °F) only lifts density altitude to about 2,308 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: August · ≈2,308 ft station: RAYVILLE · 1 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at RAYVILLE (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 47.7 −633 ft 57.4 15 ft
February 51.3 −391 ft 61.6 291 ft
March 59.0 121 ft 69.8 822 ft
April 66.6 616 ft 77.6 1,318 ft
May 74.0 1,091 ft 84.0 1,719 ft
June 80.7 1,513 ft 90.1 2,095 ft
July 83.5 1,688 ft 92.7 2,254 ft
August 83.6 1,694 ft 93.6 2,308 ft
September 77.9 1,337 ft 88.5 1,997 ft
October 68.0 707 ft 80.1 1,475 ft
November 57.0 −11 ft 68.3 726 ft
December 49.8 −491 ft 59.7 167 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 M79

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,333 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,333 ft

Field elevation 83 ft — the air behaves like 2,333 ft.

PRESSURE ALT
84 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 M79 in summer?

On a typical August afternoon — around 94 °F at the nearest NOAA normals station — density altitude at John H Hooks Jr Meml reaches roughly 2,308 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 M79 on an average day?

It swings with the seasons: from roughly −633 ft at the coldest month's average temperature to about 1,694 ft at the warmest month's — all from a constant field elevation of 83 ft. The month-by-month table above carries the full year.

What is the field elevation of John H Hooks Jr Meml?

83 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is M79 (FAA), in Rayville, Louisiana.