Olney-Noble, Illinois · field elev 482 ft
Density Altitude at Olney-Noble (KOLY)
Olney-Noble sits at 482 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,378 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 | 29.3 | −1,407 ft | 37.8 | −813 ft |
| February | 33.3 | −1,126 ft | 42.7 | −477 ft |
| March | 42.9 | −463 ft | 53.4 | 243 ft |
| April | 54.2 | 297 ft | 65.6 | 1,043 ft |
| May | 64.2 | 952 ft | 75.1 | 1,649 ft |
| June | 73.2 | 1,529 ft | 84.1 | 2,212 ft |
| July | 76.2 | 1,719 ft | 86.8 | 2,378 ft |
| August | 74.8 | 1,630 ft | 85.8 | 2,317 ft |
| September | 68.1 | 1,204 ft | 80.4 | 1,982 ft |
| October | 56.4 | 442 ft | 68.5 | 1,229 ft |
| November | 43.7 | −409 ft | 53.9 | 277 ft |
| December | 34.0 | −1,077 ft | 42.3 | −504 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 KOLY
DENSITY ALTITUDE
Field elevation 482 ft — the air behaves like 2,391 ft.
- PRESSURE ALT
- 483 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
- KFOA — Flora Municipal
Flora · elev 473 ft
- KAJG — Mount Carmel Municipal
Mount Carmel · elev 429 ft
- KFWC — Fairfield Municipal
Fairfield · elev 434 ft
- 2T2 — Percival Springs
Watson · elev 552 ft
- 1H2 — Effingham County Regional
Effingham · elev 585 ft
- KLWV — Lawrenceville-Vincennes International
Lawrenceville · elev 430 ft
- KRSV — Crawford County
Robinson · elev 461 ft
- 1H8 — Casey Municipal
Casey · elev 655 ft
Frequently asked questions
How high does density altitude get at KOLY in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Olney-Noble reaches roughly 2,378 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 KOLY on an average day?
It swings with the seasons: from roughly −1,407 ft at the coldest month's average temperature to about 1,719 ft at the warmest month's — all from a constant field elevation of 482 ft. The month-by-month table above carries the full year.
What is the field elevation of Olney-Noble?
482 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOLY (ICAO) / OLY (FAA), in Olney-Noble, Illinois.