Oxford, Maine · field elev 345 ft

Density Altitude at Oxford County Regional (81B)

Oxford County Regional sits at 345 ft, and even a typical July afternoon (78 °F) only lifts density altitude to about 1,664 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈1,664 ft station: POLAND · 12 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at POLAND (12 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 −2,315 ft 27.4 −1,713 ft
February 21.3 −2,149 ft 30.2 −1,515 ft
March 29.4 −1,571 ft 38.2 −956 ft
April 41.7 −716 ft 51.7 −39 ft
May 53.3 67 ft 63.5 738 ft
June 62.6 680 ft 73.1 1,355 ft
July 68.2 1,042 ft 78.0 1,664 ft
August 66.9 958 ft 77.1 1,608 ft
September 58.6 418 ft 68.9 1,087 ft
October 46.7 −376 ft 55.9 240 ft
November 35.9 −1,116 ft 43.8 −572 ft
December 25.9 −1,819 ft 33.5 −1,283 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 81B

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 1,664 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 1,664 ft

Field elevation 345 ft — the air behaves like 1,664 ft.

PRESSURE ALT
346 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 81B in summer?

On a typical July afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Oxford County Regional reaches roughly 1,664 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 81B on an average day?

It swings with the seasons: from roughly −2,315 ft at the coldest month's average temperature to about 1,042 ft at the warmest month's — all from a constant field elevation of 345 ft. The month-by-month table above carries the full year.

What is the field elevation of Oxford County Regional?

345 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 81B (FAA), in Oxford, Maine.