Le Mars, Iowa · field elev 1,197 ft
Density Altitude at Le Mars Municipal (KLRJ)
Le Mars Municipal sits at 1,197 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 3,109 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 17.3 | −1,367 ft | 27.2 | −660 ft |
| February | 21.8 | −1,043 ft | 32.2 | −310 ft |
| March | 34.5 | −150 ft | 45.9 | 628 ft |
| April | 47.0 | 701 ft | 59.9 | 1,554 ft |
| May | 59.3 | 1,515 ft | 71.7 | 2,311 ft |
| June | 69.8 | 2,190 ft | 81.3 | 2,911 ft |
| July | 73.1 | 2,399 ft | 84.5 | 3,109 ft |
| August | 70.5 | 2,235 ft | 82.0 | 2,955 ft |
| September | 62.7 | 1,735 ft | 75.8 | 2,569 ft |
| October | 49.7 | 882 ft | 62.5 | 1,722 ft |
| November | 34.6 | −143 ft | 45.7 | 614 ft |
| December | 22.4 | −1,000 ft | 32.0 | −324 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 KLRJ
DENSITY ALTITUDE
Field elevation 1,197 ft — the air behaves like 3,139 ft.
- PRESSURE ALT
- 1,198 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 Iowa fields
- KSXK — Sioux County Regional
Maurice · elev 1,409 ft
- KSUX — Sioux Gateway/Brig General Bud Day Field
Sioux City · elev 1,099 ft
- 1Y9 — Paullina Municipal
Paullina · elev 1,385 ft
- KCKP — Cherokee County Regional
Cherokee · elev 1,227 ft
- KSHL — Sheldon Regional
Sheldon · elev 1,419 ft
- KMEY — James G Whiting Meml Field
Mapleton · elev 1,116 ft
- KISB — Sibley Municipal
Sibley · elev 1,538 ft
- KRRQ — Rock Rapids Municipal
Rock Rapids · elev 1,363 ft
Frequently asked questions
How high does density altitude get at KLRJ in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Le Mars Municipal reaches roughly 3,109 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 KLRJ on an average day?
It swings with the seasons: from roughly −1,367 ft at the coldest month's average temperature to about 2,399 ft at the warmest month's — all from a constant field elevation of 1,197 ft. The month-by-month table above carries the full year.
What is the field elevation of Le Mars Municipal?
1,197 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLRJ (ICAO) / LRJ (FAA), in Le Mars, Iowa.