Sully, Iowa · field elev 922 ft
Density Altitude at Sully Municipal (8C2)
Sully Municipal sits at 922 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,699 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 | 19.3 | −1,568 ft | 28.3 | −927 ft |
| February | 23.3 | −1,281 ft | 33.0 | −597 ft |
| March | 35.4 | −431 ft | 46.1 | 300 ft |
| April | 47.3 | 381 ft | 59.4 | 1,182 ft |
| May | 58.5 | 1,123 ft | 69.9 | 1,859 ft |
| June | 68.6 | 1,776 ft | 79.5 | 2,464 ft |
| July | 72.5 | 2,024 ft | 83.3 | 2,699 ft |
| August | 70.2 | 1,878 ft | 81.2 | 2,569 ft |
| September | 62.7 | 1,397 ft | 75.2 | 2,195 ft |
| October | 50.2 | 575 ft | 62.3 | 1,371 ft |
| November | 36.6 | −348 ft | 46.8 | 347 ft |
| December | 25.2 | −1,146 ft | 34.0 | −528 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 8C2
DENSITY ALTITUDE
Field elevation 922 ft — the air behaves like 2,681 ft.
- PRESSURE ALT
- 923 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
- KGGI — Grinnell Regional
Grinnell · elev 1,008 ft
- KTNU — Newton Municipal-Earl Johnson Field
Newton · elev 953 ft
- KPEA — Pella Municipal
Pella · elev 885 ft
- KOXV — Knoxville Municipal
Knoxville · elev 928 ft
- KOOA — Oskaloosa Municipal
Oskaloosa · elev 840 ft
- 8C5 — Toledo Municipal
Toledo · elev 960 ft
- KTZT — Belle Plaine Municipal
Belle Plaine · elev 771 ft
- KMIW — Marshalltown Municipal
Marshalltown · elev 975 ft
Frequently asked questions
How high does density altitude get at 8C2 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Sully Municipal reaches roughly 2,699 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 8C2 on an average day?
It swings with the seasons: from roughly −1,568 ft at the coldest month's average temperature to about 2,024 ft at the warmest month's — all from a constant field elevation of 922 ft. The month-by-month table above carries the full year.
What is the field elevation of Sully Municipal?
922 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 8C2 (FAA), in Sully, Iowa.