Champaign/Urbana, Illinois · field elev 755 ft
Density Altitude at University Of Illinois/Willard (KCMI)
University Of Illinois/Willard sits at 755 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 2,601 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 | 26.0 | −1,298 ft | 34.1 | −729 ft |
| February | 30.3 | −995 ft | 38.9 | −398 ft |
| March | 41.3 | −233 ft | 51.5 | 455 ft |
| April | 52.8 | 541 ft | 64.7 | 1,321 ft |
| May | 64.0 | 1,275 ft | 75.5 | 2,009 ft |
| June | 72.6 | 1,826 ft | 83.5 | 2,508 ft |
| July | 74.7 | 1,959 ft | 85.0 | 2,601 ft |
| August | 72.8 | 1,838 ft | 83.5 | 2,508 ft |
| September | 67.0 | 1,469 ft | 79.4 | 2,253 ft |
| October | 55.0 | 687 ft | 66.9 | 1,462 ft |
| November | 41.9 | −192 ft | 51.5 | 455 ft |
| December | 31.3 | −925 ft | 39.1 | −384 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 KCMI
DENSITY ALTITUDE
Field elevation 755 ft — the air behaves like 2,601 ft.
- PRESSURE ALT
- 756 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
- C16 — Frasca Field
Urbana · elev 735 ft
- K96 — Tuscola
Tuscola · elev 665 ft
- KTIP — Rantoul Ntl Avn Cntr-Frank Elliott Field
Rantoul · elev 738 ft
- 1C1 — Paxton
Paxton · elev 779 ft
- KDEC — Decatur
Decatur · elev 682 ft
- KDNV — Vermilion Regional
Danville · elev 697 ft
- KMTO — Coles County Meml
Mattoon/Charleston · elev 722 ft
- KPRG — Edgar County
Paris · elev 654 ft
Frequently asked questions
How high does density altitude get at KCMI in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at University Of Illinois/Willard reaches roughly 2,601 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 KCMI on an average day?
It swings with the seasons: from roughly −1,298 ft at the coldest month's average temperature to about 1,959 ft at the warmest month's — all from a constant field elevation of 755 ft. The month-by-month table above carries the full year.
What is the field elevation of University Of Illinois/Willard?
755 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KCMI (ICAO) / CMI (FAA), in Champaign/Urbana, Illinois.