Peoria, Illinois · field elev 793 ft
Density Altitude at Mount Hawley Auxiliary (3MY)
Mount Hawley Auxiliary sits at 793 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,684 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 | 23.5 | −1,429 ft | 32.5 | −793 ft |
| February | 27.8 | −1,123 ft | 37.4 | −453 ft |
| March | 39.1 | −336 ft | 50.2 | 415 ft |
| April | 51.0 | 469 ft | 63.5 | 1,290 ft |
| May | 62.5 | 1,225 ft | 74.5 | 1,993 ft |
| June | 71.7 | 1,815 ft | 82.9 | 2,517 ft |
| July | 74.4 | 1,986 ft | 85.6 | 2,684 ft |
| August | 72.3 | 1,853 ft | 83.8 | 2,573 ft |
| September | 65.2 | 1,400 ft | 78.2 | 2,225 ft |
| October | 53.1 | 608 ft | 65.4 | 1,412 ft |
| November | 40.4 | −247 ft | 50.7 | 449 ft |
| December | 28.6 | −1,067 ft | 37.4 | −453 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 3MY
DENSITY ALTITUDE
Field elevation 793 ft — the air behaves like 2,708 ft.
- PRESSURE ALT
- 794 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
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- 2C6 — Tri-County
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- KCTK — Ingersoll
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- KEZI — Kewanee Municipal
Kewanee · elev 858 ft
- KBMI — Central Il Regional/Bloomington-Normal
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- KGBG — Harrel W Timmons Galesburg Regional
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Frequently asked questions
How high does density altitude get at 3MY in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Mount Hawley Auxiliary reaches roughly 2,684 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 3MY on an average day?
It swings with the seasons: from roughly −1,429 ft at the coldest month's average temperature to about 1,986 ft at the warmest month's — all from a constant field elevation of 793 ft. The month-by-month table above carries the full year.
What is the field elevation of Mount Hawley Auxiliary?
793 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3MY (FAA), in Peoria, Illinois.