Greenville, Illinois · field elev 541 ft
Density Altitude at Greenville (KGRE)
Greenville sits at 541 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,542 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 | 30.3 | −1,262 ft | 39.1 | −650 ft |
| February | 34.8 | −948 ft | 44.8 | −261 ft |
| March | 44.6 | −274 ft | 54.8 | 409 ft |
| April | 55.7 | 469 ft | 66.6 | 1,180 ft |
| May | 65.9 | 1,135 ft | 75.9 | 1,772 ft |
| June | 74.9 | 1,709 ft | 84.8 | 2,327 ft |
| July | 78.2 | 1,917 ft | 88.3 | 2,542 ft |
| August | 76.8 | 1,829 ft | 87.4 | 2,487 ft |
| September | 69.5 | 1,366 ft | 81.0 | 2,092 ft |
| October | 57.9 | 614 ft | 69.5 | 1,366 ft |
| November | 45.3 | −227 ft | 55.1 | 429 ft |
| December | 34.8 | −948 ft | 43.3 | −363 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 KGRE
DENSITY ALTITUDE
Field elevation 541 ft — the air behaves like 2,524 ft.
- PRESSURE ALT
- 542 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
- H07 — Highland-Winet
Highland · elev 537 ft
- KVLA — Vandalia Municipal
Vandalia · elev 537 ft
- KSLO — Salem-Leckrone
Salem · elev 573 ft
- KENL — Centralia Municipal
Centralia · elev 534 ft
- 3LF — Litchfield Municipal
Litchfield · elev 691 ft
- KBLV — Scott AFB/Midamerica St Louis
Belleville · elev 459 ft
- KALN — St Louis Regional
Alton/St Louis · elev 544 ft
- KMVN — Mount Vernon
Mount Vernon · elev 480 ft
Frequently asked questions
How high does density altitude get at KGRE in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Greenville reaches roughly 2,542 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 KGRE on an average day?
It swings with the seasons: from roughly −1,262 ft at the coldest month's average temperature to about 1,917 ft at the warmest month's — all from a constant field elevation of 541 ft. The month-by-month table above carries the full year.
What is the field elevation of Greenville?
541 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGRE (ICAO) / GRE (FAA), in Greenville, Illinois.