Mount Sterling, Illinois · field elev 734 ft
Density Altitude at Mount Sterling Municipal (I63)
Mount Sterling Municipal sits at 734 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,667 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 | −1,396 ft | 33.8 | −776 ft |
| February | 29.2 | −1,098 ft | 38.8 | −431 ft |
| March | 40.4 | −321 ft | 51.1 | 402 ft |
| April | 51.6 | 436 ft | 63.5 | 1,217 ft |
| May | 63.1 | 1,191 ft | 74.0 | 1,889 ft |
| June | 72.6 | 1,800 ft | 83.1 | 2,458 ft |
| July | 75.6 | 1,990 ft | 86.5 | 2,667 ft |
| August | 73.7 | 1,870 ft | 84.7 | 2,556 ft |
| September | 66.5 | 1,411 ft | 78.7 | 2,184 ft |
| October | 54.4 | 621 ft | 66.1 | 1,385 ft |
| November | 41.4 | −252 ft | 51.3 | 416 ft |
| December | 30.3 | −1,021 ft | 38.7 | −437 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 I63
DENSITY ALTITUDE
Field elevation 734 ft — the air behaves like 2,698 ft.
- PRESSURE ALT
- 735 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
- 5K4 — Schuy-Rush
Rushville · elev 665 ft
- KUIN — Quincy Regional-Baldwin Field
Quincy · elev 769 ft
- K06 — Greater Beardstown
Beardstown · elev 465 ft
- KPPQ — Pittsfield Penstone Municipal
Pittsfield · elev 710 ft
- KIJX — Jacksonville Municipal
Jacksonville · elev 624 ft
- KMQB — Macomb Municipal
Macomb · elev 706 ft
- 9I0 — Havana Regional
Havana · elev 488 ft
- KCTK — Ingersoll
Canton · elev 684 ft
Frequently asked questions
How high does density altitude get at I63 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Mount Sterling Municipal reaches roughly 2,667 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 I63 on an average day?
It swings with the seasons: from roughly −1,396 ft at the coldest month's average temperature to about 1,990 ft at the warmest month's — all from a constant field elevation of 734 ft. The month-by-month table above carries the full year.
What is the field elevation of Mount Sterling Municipal?
734 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is I63 (FAA), in Mount Sterling, Illinois.