Ackley, Iowa · field elev 1,070 ft
Density Altitude at Ackley Municipal (4C7)
Ackley Municipal sits at 1,070 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,855 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 | 16.9 | −1,555 ft | 25.7 | −925 ft |
| February | 21.3 | −1,238 ft | 30.6 | −580 ft |
| March | 33.9 | −350 ft | 43.5 | 308 ft |
| April | 46.8 | 531 ft | 58.3 | 1,293 ft |
| May | 58.8 | 1,325 ft | 69.9 | 2,041 ft |
| June | 69.1 | 1,990 ft | 79.9 | 2,669 ft |
| July | 72.6 | 2,212 ft | 82.9 | 2,855 ft |
| August | 70.2 | 2,060 ft | 80.8 | 2,725 ft |
| September | 62.7 | 1,579 ft | 74.8 | 2,351 ft |
| October | 50.0 | 745 ft | 61.7 | 1,514 ft |
| November | 35.3 | −253 ft | 45.0 | 409 ft |
| December | 23.2 | −1,103 ft | 31.5 | −517 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 4C7
DENSITY ALTITUDE
Field elevation 1,070 ft — the air behaves like 2,861 ft.
- PRESSURE ALT
- 1,071 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 Iowa fields
- KIFA — Iowa Falls Municipal
Iowa Falls · elev 1,137 ft
- 27P — Eldora
Eldora · elev 975 ft
- KHPT — Hampton Municipal
Hampton · elev 1,176 ft
- 6K7 — Grundy Center Municipal
Grundy Center · elev 1,075 ft
- K98 — Allison Municipal
Allison · elev 1,053 ft
- 2Y1 — Drake
Radcliffe · elev 1,179 ft
- C25 — Waverly Municipal
Waverly · elev 992 ft
- KMIW — Marshalltown Municipal
Marshalltown · elev 975 ft
Frequently asked questions
How high does density altitude get at 4C7 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Ackley Municipal reaches roughly 2,855 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 4C7 on an average day?
It swings with the seasons: from roughly −1,555 ft at the coldest month's average temperature to about 2,212 ft at the warmest month's — all from a constant field elevation of 1,070 ft. The month-by-month table above carries the full year.
What is the field elevation of Ackley Municipal?
1,070 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4C7 (FAA), in Ackley, Iowa.