Springfield, Illinois · field elev 598 ft
Density Altitude at Abraham Lincoln Capital (KSPI)
Abraham Lincoln Capital sits at 598 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,520 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 | 27.9 | −1,360 ft | 35.9 | −800 ft |
| February | 32.4 | −1,044 ft | 41.1 | −442 ft |
| March | 43.2 | −299 ft | 53.1 | 367 ft |
| April | 54.4 | 453 ft | 65.6 | 1,185 ft |
| May | 65.1 | 1,153 ft | 75.7 | 1,829 ft |
| June | 73.7 | 1,703 ft | 84.0 | 2,347 ft |
| July | 76.5 | 1,880 ft | 86.8 | 2,520 ft |
| August | 74.9 | 1,779 ft | 85.4 | 2,434 ft |
| September | 68.0 | 1,340 ft | 80.2 | 2,111 ft |
| October | 56.0 | 559 ft | 67.4 | 1,301 ft |
| November | 43.5 | −278 ft | 52.7 | 340 ft |
| December | 32.9 | −1,009 ft | 40.7 | −469 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 KSPI
DENSITY ALTITUDE
Field elevation 598 ft — the air behaves like 2,532 ft.
- PRESSURE ALT
- 599 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
- KAAA — Logan County
Lincoln · elev 594 ft
- KTAZ — Taylorville Municipal
Taylorville · elev 622 ft
- KIJX — Jacksonville Municipal
Jacksonville · elev 624 ft
- 9I0 — Havana Regional
Havana · elev 488 ft
- 5K1 — Zelmer Meml Airpark Inc
Palmyra · elev 663 ft
- K06 — Greater Beardstown
Beardstown · elev 465 ft
- KDEC — Decatur
Decatur · elev 682 ft
- C15 — Pekin Municipal
Pekin · elev 530 ft
Frequently asked questions
How high does density altitude get at KSPI in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Abraham Lincoln Capital reaches roughly 2,520 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 KSPI on an average day?
It swings with the seasons: from roughly −1,360 ft at the coldest month's average temperature to about 1,880 ft at the warmest month's — all from a constant field elevation of 598 ft. The month-by-month table above carries the full year.
What is the field elevation of Abraham Lincoln Capital?
598 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSPI (ICAO) / SPI (FAA), in Springfield, Illinois.