Rio, Wisconsin · field elev 927 ft

Density Altitude at Gilbert Field (94C)

Gilbert Field sits at 927 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,600 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,600 ft station: PORTAGE WWTP · 11 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at PORTAGE WWTP (11 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 18.0 −1,656 ft 26.1 −1,076 ft
February 21.9 −1,375 ft 30.6 −759 ft
March 33.2 −577 ft 42.4 56 ft
April 45.8 286 ft 55.7 946 ft
May 58.0 1,097 ft 68.2 1,757 ft
June 67.9 1,738 ft 77.9 2,370 ft
July 71.6 1,973 ft 81.6 2,600 ft
August 69.6 1,846 ft 79.9 2,495 ft
September 61.6 1,332 ft 72.6 2,037 ft
October 49.2 514 ft 59.3 1,182 ft
November 36.3 −362 ft 44.2 178 ft
December 24.4 −1,196 ft 31.8 −675 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 94C

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,625 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,625 ft

Field elevation 927 ft — the air behaves like 2,625 ft.

PRESSURE ALT
928 ft
ISA DEVIATION
—
RULE-OF-THUMB DA
—
AIR DENSITY INDEX
—
AIR DENSITY
—
WATER · GRAINS/LB
—

For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment

Nearby Wisconsin fields

All Wisconsin airports →

Frequently asked questions

How high does density altitude get at 94C in summer?

On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Gilbert Field reaches roughly 2,600 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 94C on an average day?

It swings with the seasons: from roughly −1,656 ft at the coldest month's average temperature to about 1,973 ft at the warmest month's — all from a constant field elevation of 927 ft. The month-by-month table above carries the full year.

What is the field elevation of Gilbert Field?

927 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 94C (FAA), in Rio, Wisconsin.