Ruby, Alaska · field elev 658 ft

Density Altitude at Ruby (PARY)

Ruby sits at 658 ft, and even a typical July afternoon (71 °F) only lifts density altitude to about 1,618 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈1,618 ft station: RUBY 44 ESE · 43 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at RUBY 44 ESE (43 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 −11.1 −4,187 ft −1.4 −3,437 ft
February 1.7 −3,201 ft 11.5 −2,469 ft
March 10.3 −2,558 ft 24.3 −1,541 ft
April 30.7 −1,088 ft 43.0 −238 ft
May 46.4 −7 ft 59.4 857 ft
June 57.9 758 ft 70.3 1,561 ft
July 60.2 909 ft 71.2 1,618 ft
August 53.5 468 ft 63.7 1,136 ft
September 42.6 −265 ft 52.6 408 ft
October 25.6 −1,448 ft 33.8 −871 ft
November 2.9 −3,110 ft 11.9 −2,440 ft
December −4.5 −3,674 ft 3.8 −3,043 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 PARY

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 1,605 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 1,605 ft

Field elevation 658 ft — the air behaves like 1,605 ft.

PRESSURE ALT
659 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 PARY in summer?

On a typical July afternoon — around 71 °F at the nearest NOAA normals station — density altitude at Ruby reaches roughly 1,618 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 PARY on an average day?

It swings with the seasons: from roughly −4,187 ft at the coldest month's average temperature to about 909 ft at the warmest month's — all from a constant field elevation of 658 ft. The month-by-month table above carries the full year.

What is the field elevation of Ruby?

658 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PARY (ICAO) / RBY (FAA), in Ruby, Alaska.