Merrill, Wisconsin · field elev 1,318 ft

Density Altitude at Merrill Municipal (KRRL)

Merrill Municipal sits at 1,318 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,991 ft — heat still trims performance, but the field rarely turns high-and-hot.

worst typical month: July · ≈2,991 ft station: MERRILL · 3 mi away normals vintage 1991–2020

Typical density altitude by month

From NOAA 1991–2020 monthly normals at MERRILL (3 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 12.7 −1,549 ft 22.0 −877 ft
February 15.8 −1,323 ft 26.6 −551 ft
March 27.9 −459 ft 38.7 289 ft
April 41.3 467 ft 52.9 1,244 ft
May 54.6 1,356 ft 66.6 2,135 ft
June 64.6 2,006 ft 76.1 2,736 ft
July 68.6 2,262 ft 80.2 2,991 ft
August 66.3 2,115 ft 77.9 2,848 ft
September 58.0 1,579 ft 69.7 2,332 ft
October 44.9 710 ft 55.4 1,409 ft
November 31.4 −215 ft 39.7 358 ft
December 19.4 −1,063 ft 27.4 −495 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 KRRL

Altimeter-style gauge: field elevation and density altitude needles 03691215 DENSITY ALT ×1,000 FT 2,978 DENSITY ALTITUDE · FEET
field elevation density altitude

DENSITY ALTITUDE 2,978 ft

Field elevation 1,318 ft — the air behaves like 2,978 ft.

PRESSURE ALT
1,319 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 KRRL in summer?

On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Merrill Municipal reaches roughly 2,991 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 KRRL on an average day?

It swings with the seasons: from roughly −1,549 ft at the coldest month's average temperature to about 2,262 ft at the warmest month's — all from a constant field elevation of 1,318 ft. The month-by-month table above carries the full year.

What is the field elevation of Merrill Municipal?

1,318 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRRL (ICAO) / RRL (FAA), in Merrill, Wisconsin.