Appleton, Wisconsin · field elev 918 ft
Density Altitude at Appleton International (KATW)
Appleton International sits at 918 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,583 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 | 17.7 | −1,689 ft | 25.4 | −1,137 ft |
| February | 20.4 | −1,494 ft | 29.1 | −875 ft |
| March | 31.4 | −714 ft | 40.6 | −78 ft |
| April | 44.0 | 153 ft | 54.0 | 822 ft |
| May | 56.8 | 1,007 ft | 67.2 | 1,682 ft |
| June | 66.8 | 1,656 ft | 77.0 | 2,303 ft |
| July | 71.4 | 1,950 ft | 81.5 | 2,583 ft |
| August | 69.5 | 1,829 ft | 79.3 | 2,446 ft |
| September | 61.3 | 1,301 ft | 71.9 | 1,981 ft |
| October | 48.6 | 463 ft | 57.8 | 1,073 ft |
| November | 35.5 | −429 ft | 43.4 | 112 ft |
| December | 23.8 | −1,250 ft | 30.7 | −763 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 KATW
DENSITY ALTITUDE
Field elevation 918 ft — the air behaves like 2,614 ft.
- PRESSURE ALT
- 919 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 Wisconsin fields
- 79C — Brennand
Neenah · elev 844 ft
- W34 — Shiocton
Shiocton · elev 760 ft
- KOSH — Wittman Regional
Oshkosh · elev 809 ft
- 11Y — Flying Feathers
Chilton · elev 913 ft
- KGRB — Green Bay/Austin Straubel International
Green Bay · elev 695 ft
- KPCZ — Waupaca Municipal
Waupaca · elev 840 ft
- KCLI — Clintonville Municipal
Clintonville · elev 826 ft
- 8D1 — New Holstein Municipal
New Holstein · elev 992 ft
Frequently asked questions
How high does density altitude get at KATW in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Appleton International reaches roughly 2,583 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 KATW on an average day?
It swings with the seasons: from roughly −1,689 ft at the coldest month's average temperature to about 1,950 ft at the warmest month's — all from a constant field elevation of 918 ft. The month-by-month table above carries the full year.
What is the field elevation of Appleton International?
918 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KATW (ICAO) / ATW (FAA), in Appleton, Wisconsin.