Hilliard, Florida · field elev 59 ft

Density Altitude at Hilliard Airpark (01J)

Hilliard Airpark sits at 59 ft, and even a typical July afternoon (94 °F) only lifts density altitude to about 2,328 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,328 ft station: FOLKSTON 9 SW · 14 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at FOLKSTON 9 SW (14 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 55.2 −160 ft 66.6 587 ft
February 58.4 52 ft 70.2 819 ft
March 63.6 392 ft 76.3 1,207 ft
April 69.7 787 ft 82.7 1,608 ft
May 76.1 1,194 ft 88.4 1,961 ft
June 81.5 1,534 ft 92.6 2,218 ft
July 83.6 1,664 ft 94.4 2,328 ft
August 83.0 1,627 ft 93.2 2,255 ft
September 79.6 1,415 ft 89.5 2,029 ft
October 71.9 927 ft 82.6 1,602 ft
November 63.2 366 ft 74.7 1,106 ft
December 57.4 −14 ft 68.4 703 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 01J

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,303 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,303 ft

Field elevation 59 ft — the air behaves like 2,303 ft.

PRESSURE ALT
60 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 01J in summer?

On a typical July afternoon — around 94 °F at the nearest NOAA normals station — density altitude at Hilliard Airpark reaches roughly 2,328 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 01J on an average day?

It swings with the seasons: from roughly −160 ft at the coldest month's average temperature to about 1,664 ft at the warmest month's — all from a constant field elevation of 59 ft. The month-by-month table above carries the full year.

What is the field elevation of Hilliard Airpark?

59 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 01J (FAA), in Hilliard, Florida.