Bloomington/Normal, Illinois · field elev 871 ft
Density Altitude at Central Il Regional/Bloomington-Normal (KBMI)
Central Il Regional/Bloomington-Normal sits at 871 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,803 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 | 24.5 | −1,260 ft | 33.4 | −633 ft |
| February | 28.5 | −976 ft | 38.2 | −301 ft |
| March | 38.8 | −260 ft | 49.8 | 485 ft |
| April | 50.3 | 518 ft | 62.8 | 1,340 ft |
| May | 61.9 | 1,282 ft | 74.0 | 2,057 ft |
| June | 71.6 | 1,905 ft | 83.3 | 2,637 ft |
| July | 74.5 | 2,088 ft | 86.0 | 2,803 ft |
| August | 72.6 | 1,968 ft | 84.4 | 2,705 ft |
| September | 65.9 | 1,541 ft | 78.8 | 2,358 ft |
| October | 53.7 | 744 ft | 65.6 | 1,521 ft |
| November | 40.5 | −144 ft | 50.2 | 512 ft |
| December | 29.8 | −885 ft | 38.3 | −294 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 KBMI
DENSITY ALTITUDE
Field elevation 871 ft — the air behaves like 2,803 ft.
- PRESSURE ALT
- 872 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
- KPNT — Pontiac Municipal
Pontiac · elev 666 ft
- C15 — Pekin Municipal
Pekin · elev 530 ft
- 1C1 — Paxton
Paxton · elev 779 ft
- KTIP — Rantoul Ntl Avn Cntr-Frank Elliott Field
Rantoul · elev 738 ft
- 3MY — Mount Hawley Auxiliary
Peoria · elev 793 ft
- KPIA — General Downing - Peoria International
Peoria · elev 661 ft
- C16 — Frasca Field
Urbana · elev 735 ft
Frequently asked questions
How high does density altitude get at KBMI in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Central Il Regional/Bloomington-Normal reaches roughly 2,803 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 KBMI on an average day?
It swings with the seasons: from roughly −1,260 ft at the coldest month's average temperature to about 2,088 ft at the warmest month's — all from a constant field elevation of 871 ft. The month-by-month table above carries the full year.
What is the field elevation of Central Il Regional/Bloomington-Normal?
871 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBMI (ICAO) / BMI (FAA), in Bloomington/Normal, Illinois.