Pinckneyville, Illinois · field elev 400 ft
Density Altitude at Pinckneyville/Du Quoin (KPJY)
Pinckneyville/Du Quoin sits at 400 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,303 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 | 32.1 | −1,312 ft | 40.4 | −736 ft |
| February | 36.7 | −992 ft | 45.7 | −375 ft |
| March | 46.0 | −355 ft | 55.9 | 308 ft |
| April | 56.8 | 367 ft | 67.5 | 1,064 ft |
| May | 66.1 | 974 ft | 76.1 | 1,612 ft |
| June | 74.3 | 1,498 ft | 84.4 | 2,130 ft |
| July | 77.4 | 1,694 ft | 87.2 | 2,303 ft |
| August | 75.7 | 1,587 ft | 86.4 | 2,254 ft |
| September | 68.3 | 1,116 ft | 80.0 | 1,857 ft |
| October | 57.5 | 413 ft | 69.0 | 1,161 ft |
| November | 45.2 | −409 ft | 55.0 | 248 ft |
| December | 36.2 | −1,026 ft | 44.4 | −463 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 KPJY
DENSITY ALTITUDE
Field elevation 400 ft — the air behaves like 2,291 ft.
- PRESSURE ALT
- 401 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 Illinois fields
- KMDH — Southern Illinois
Carbondale/Murphysboro · elev 411 ft
- KSAR — Sparta Community-Hunter Field
Sparta · elev 538 ft
- H96 — Benton Municipal
Benton · elev 444 ft
- KMWA — Veterans Airport Of Southern Illinois
Marion · elev 472 ft
- KMVN — Mount Vernon
Mount Vernon · elev 480 ft
- KENL — Centralia Municipal
Centralia · elev 534 ft
- KHSB — Harrisburg-Raleigh
Harrisburg · elev 398 ft
- KBLV — Scott AFB/Midamerica St Louis
Belleville · elev 459 ft
Frequently asked questions
How high does density altitude get at KPJY in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Pinckneyville/Du Quoin reaches roughly 2,303 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 KPJY on an average day?
It swings with the seasons: from roughly −1,312 ft at the coldest month's average temperature to about 1,694 ft at the warmest month's — all from a constant field elevation of 400 ft. The month-by-month table above carries the full year.
What is the field elevation of Pinckneyville/Du Quoin?
400 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KPJY (ICAO) / PJY (FAA), in Pinckneyville, Illinois.