Morrilton, Arkansas · field elev 923 ft
Density Altitude at Petit Jean Park (KMPJ)
Petit Jean Park sits at 923 ft, and even a typical August afternoon (93 °F) only lifts density altitude to about 3,269 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 | 39.5 | −147 ft | 50.0 | 563 ft |
| February | 43.5 | 125 ft | 55.2 | 908 ft |
| March | 51.7 | 676 ft | 63.8 | 1,469 ft |
| April | 60.5 | 1,255 ft | 72.9 | 2,051 ft |
| May | 69.2 | 1,816 ft | 80.2 | 2,509 ft |
| June | 77.8 | 2,359 ft | 88.3 | 3,008 ft |
| July | 81.7 | 2,602 ft | 92.5 | 3,263 ft |
| August | 80.7 | 2,540 ft | 92.6 | 3,269 ft |
| September | 73.5 | 2,089 ft | 85.9 | 2,861 ft |
| October | 62.1 | 1,359 ft | 75.1 | 2,190 ft |
| November | 50.7 | 610 ft | 62.6 | 1,391 ft |
| December | 42.0 | 23 ft | 52.5 | 729 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 KMPJ
DENSITY ALTITUDE
Field elevation 923 ft — the air behaves like 3,293 ft.
- PRESSURE ALT
- 924 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 Arkansas fields
- KBDQ — Morrilton Municipal
Morrilton · elev 321 ft
- KRUE — Russellville Regional
Russellville · elev 409 ft
- KCXW — Conway Regional
Conway · elev 276 ft
- 32A — Danville Municipal
Danville · elev 393 ft
- 12A — Arkavalley
Greenbrier · elev 329 ft
- H35 — Clarksville Municipal
Clarksville · elev 481 ft
- KCCA — Clinton Municipal
Clinton · elev 514 ft
- KORK — North Little Rock Municipal
North Little Rock · elev 545 ft
Frequently asked questions
How high does density altitude get at KMPJ in summer?
On a typical August afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Petit Jean Park reaches roughly 3,269 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 KMPJ on an average day?
It swings with the seasons: from roughly −147 ft at the coldest month's average temperature to about 2,602 ft at the warmest month's — all from a constant field elevation of 923 ft. The month-by-month table above carries the full year.
What is the field elevation of Petit Jean Park?
923 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KMPJ (ICAO) / MPJ (FAA), in Morrilton, Arkansas.