Rushville, Illinois · field elev 665 ft
Density Altitude at Schuy-Rush (5K4)
Schuy-Rush sits at 665 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 2,460 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 | 25.0 | −1,482 ft | 32.9 | −925 ft |
| February | 29.5 | −1,164 ft | 38.1 | −565 ft |
| March | 40.3 | −414 ft | 49.8 | 230 ft |
| April | 51.9 | 370 ft | 62.3 | 1,054 ft |
| May | 62.3 | 1,054 ft | 72.2 | 1,690 ft |
| June | 71.3 | 1,633 ft | 81.0 | 2,243 ft |
| July | 74.9 | 1,861 ft | 84.5 | 2,460 ft |
| August | 73.1 | 1,747 ft | 83.2 | 2,380 ft |
| September | 66.2 | 1,307 ft | 77.0 | 1,993 ft |
| October | 54.2 | 523 ft | 64.8 | 1,216 ft |
| November | 41.4 | −338 ft | 50.3 | 263 ft |
| December | 30.6 | −1,086 ft | 38.5 | −537 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 5K4
DENSITY ALTITUDE
Field elevation 665 ft — the air behaves like 2,491 ft.
- PRESSURE ALT
- 666 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
- K06 — Greater Beardstown
Beardstown · elev 465 ft
- I63 — Mount Sterling Municipal
Mount Sterling · elev 734 ft
- KMQB — Macomb Municipal
Macomb · elev 706 ft
- KIJX — Jacksonville Municipal
Jacksonville · elev 624 ft
- 9I0 — Havana Regional
Havana · elev 488 ft
- KUIN — Quincy Regional-Baldwin Field
Quincy · elev 769 ft
- KPPQ — Pittsfield Penstone Municipal
Pittsfield · elev 710 ft
- KCTK — Ingersoll
Canton · elev 684 ft
Frequently asked questions
How high does density altitude get at 5K4 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Schuy-Rush reaches roughly 2,460 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 5K4 on an average day?
It swings with the seasons: from roughly −1,482 ft at the coldest month's average temperature to about 1,861 ft at the warmest month's — all from a constant field elevation of 665 ft. The month-by-month table above carries the full year.
What is the field elevation of Schuy-Rush?
665 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5K4 (FAA), in Rushville, Illinois.