Jacksonville, Illinois · field elev 624 ft
Density Altitude at Jacksonville Municipal (KIJX)
Jacksonville Municipal sits at 624 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,533 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 | 27.1 | −1,384 ft | 36.0 | −761 ft |
| February | 31.2 | −1,095 ft | 41.1 | −410 ft |
| March | 41.2 | −403 ft | 52.4 | 353 ft |
| April | 52.6 | 366 ft | 64.9 | 1,172 ft |
| May | 63.3 | 1,069 ft | 74.8 | 1,804 ft |
| June | 72.1 | 1,633 ft | 83.3 | 2,336 ft |
| July | 75.3 | 1,836 ft | 86.5 | 2,533 ft |
| August | 73.4 | 1,716 ft | 85.2 | 2,453 ft |
| September | 66.7 | 1,288 ft | 80.0 | 2,131 ft |
| October | 55.0 | 525 ft | 67.7 | 1,353 ft |
| November | 42.5 | −314 ft | 53.0 | 393 ft |
| December | 32.2 | −1,025 ft | 41.2 | −403 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 KIJX
DENSITY ALTITUDE
Field elevation 624 ft — the air behaves like 2,564 ft.
- PRESSURE ALT
- 625 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
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- KSPI — Abraham Lincoln Capital
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- KPPQ — Pittsfield Penstone Municipal
Pittsfield · elev 710 ft
- 5K4 — Schuy-Rush
Rushville · elev 665 ft
- 9I0 — Havana Regional
Havana · elev 488 ft
- I63 — Mount Sterling Municipal
Mount Sterling · elev 734 ft
- KTAZ — Taylorville Municipal
Taylorville · elev 622 ft
Frequently asked questions
How high does density altitude get at KIJX in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Jacksonville Municipal reaches roughly 2,533 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 KIJX on an average day?
It swings with the seasons: from roughly −1,384 ft at the coldest month's average temperature to about 1,836 ft at the warmest month's — all from a constant field elevation of 624 ft. The month-by-month table above carries the full year.
What is the field elevation of Jacksonville Municipal?
624 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KIJX (ICAO) / IJX (FAA), in Jacksonville, Illinois.