Palmyra, Illinois · field elev 663 ft
Density Altitude at Zelmer Meml Airpark Inc (5K1)
Zelmer Meml Airpark Inc sits at 663 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,562 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 | 27.7 | −1,293 ft | 36.1 | −705 ft |
| February | 32.2 | −977 ft | 41.3 | −348 ft |
| March | 42.1 | −293 ft | 52.1 | 381 ft |
| April | 54.0 | 507 ft | 65.1 | 1,233 ft |
| May | 63.8 | 1,149 ft | 74.1 | 1,808 ft |
| June | 72.8 | 1,726 ft | 82.9 | 2,359 ft |
| July | 76.1 | 1,934 ft | 86.2 | 2,562 ft |
| August | 74.3 | 1,821 ft | 85.0 | 2,488 ft |
| September | 67.1 | 1,362 ft | 79.2 | 2,128 ft |
| October | 55.4 | 600 ft | 67.0 | 1,356 ft |
| November | 43.0 | −232 ft | 52.9 | 434 ft |
| December | 32.8 | −935 ft | 40.9 | −375 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 5K1
DENSITY ALTITUDE
Field elevation 663 ft — the air behaves like 2,550 ft.
- PRESSURE ALT
- 664 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
- 3LF — Litchfield Municipal
Litchfield · elev 691 ft
- KIJX — Jacksonville Municipal
Jacksonville · elev 624 ft
- KSPI — Abraham Lincoln Capital
Springfield · elev 598 ft
- KTAZ — Taylorville Municipal
Taylorville · elev 622 ft
- KALN — St Louis Regional
Alton/St Louis · elev 544 ft
- K06 — Greater Beardstown
Beardstown · elev 465 ft
- KPPQ — Pittsfield Penstone Municipal
Pittsfield · elev 710 ft
- H07 — Highland-Winet
Highland · elev 537 ft
Frequently asked questions
How high does density altitude get at 5K1 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Zelmer Meml Airpark Inc reaches roughly 2,562 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 5K1 on an average day?
It swings with the seasons: from roughly −1,293 ft at the coldest month's average temperature to about 1,934 ft at the warmest month's — all from a constant field elevation of 663 ft. The month-by-month table above carries the full year.
What is the field elevation of Zelmer Meml Airpark Inc?
663 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5K1 (FAA), in Palmyra, Illinois.