Canton, Illinois · field elev 684 ft
Density Altitude at Ingersoll (KCTK)
Ingersoll sits at 684 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,557 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 | 24.4 | −1,501 ft | 32.7 | −915 ft |
| February | 28.5 | −1,210 ft | 37.9 | −555 ft |
| March | 39.6 | −438 ft | 50.5 | 300 ft |
| April | 51.7 | 380 ft | 63.6 | 1,162 ft |
| May | 62.9 | 1,117 ft | 73.8 | 1,815 ft |
| June | 72.0 | 1,701 ft | 82.4 | 2,353 ft |
| July | 75.1 | 1,897 ft | 85.7 | 2,557 ft |
| August | 73.0 | 1,764 ft | 83.5 | 2,421 ft |
| September | 66.4 | 1,343 ft | 78.0 | 2,079 ft |
| October | 54.5 | 566 ft | 66.0 | 1,317 ft |
| November | 40.5 | −376 ft | 50.2 | 280 ft |
| December | 29.9 | −1,112 ft | 38.1 | −541 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 KCTK
DENSITY ALTITUDE
Field elevation 684 ft — the air behaves like 2,576 ft.
- PRESSURE ALT
- 685 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
- 2C6 — Tri-County
Yates City · elev 661 ft
- KPIA — General Downing - Peoria International
Peoria · elev 661 ft
- C15 — Pekin Municipal
Pekin · elev 530 ft
- 9I0 — Havana Regional
Havana · elev 488 ft
- 3MY — Mount Hawley Auxiliary
Peoria · elev 793 ft
- KMQB — Macomb Municipal
Macomb · elev 706 ft
- KGBG — Harrel W Timmons Galesburg Regional
Galesburg · elev 764 ft
- C66 — Monmouth Municipal
Monmouth · elev 753 ft
Frequently asked questions
How high does density altitude get at KCTK in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Ingersoll reaches roughly 2,557 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 KCTK on an average day?
It swings with the seasons: from roughly −1,501 ft at the coldest month's average temperature to about 1,897 ft at the warmest month's — all from a constant field elevation of 684 ft. The month-by-month table above carries the full year.
What is the field elevation of Ingersoll?
684 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KCTK (ICAO) / CTK (FAA), in Canton, Illinois.