Independence, Iowa · field elev 979 ft
Density Altitude at James H Connell Field At Independence Municipal (KIIB)
James H Connell Field At Independence Municipal sits at 979 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,750 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 | 17.3 | −1,641 ft | 26.5 | −982 ft |
| February | 21.2 | −1,360 ft | 30.8 | −680 ft |
| March | 34.1 | −450 ft | 44.2 | 242 ft |
| April | 47.3 | 451 ft | 59.0 | 1,226 ft |
| May | 59.3 | 1,246 ft | 70.8 | 1,986 ft |
| June | 69.8 | 1,923 ft | 80.5 | 2,596 ft |
| July | 72.4 | 2,088 ft | 83.0 | 2,750 ft |
| August | 70.4 | 1,961 ft | 81.4 | 2,651 ft |
| September | 62.9 | 1,480 ft | 74.9 | 2,245 ft |
| October | 50.0 | 632 ft | 61.7 | 1,402 ft |
| November | 35.7 | −339 ft | 45.9 | 357 ft |
| December | 23.3 | −1,210 ft | 32.0 | −596 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 KIIB
DENSITY ALTITUDE
Field elevation 979 ft — the air behaves like 2,750 ft.
- PRESSURE ALT
- 980 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
- KOLZ — Oelwein Municipal
Oelwein · elev 1,076 ft
- KVTI — Vinton Veterans Meml Airpark
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- C27 — Manchester Municipal
Manchester · elev 987 ft
- KALO — Waterloo Regional
Waterloo · elev 873 ft
- 8C6 — Traer Municipal
Traer · elev 892 ft
- C25 — Waverly Municipal
Waverly · elev 992 ft
- C17 — Marion
Marion · elev 861 ft
- 3Y2 — George L Scott Municipal
West Union · elev 1,232 ft
Frequently asked questions
How high does density altitude get at KIIB in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at James H Connell Field At Independence Municipal reaches roughly 2,750 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 KIIB on an average day?
It swings with the seasons: from roughly −1,641 ft at the coldest month's average temperature to about 2,088 ft at the warmest month's — all from a constant field elevation of 979 ft. The month-by-month table above carries the full year.
What is the field elevation of James H Connell Field At Independence Municipal?
979 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KIIB (ICAO) / IIB (FAA), in Independence, Iowa.