Oshkosh, Wisconsin · field elev 809 ft
Density Altitude at Wittman Regional (KOSH)
Wittman Regional sits at 809 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,438 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 | 18.5 | −1,768 ft | 26.0 | −1,231 ft |
| February | 21.6 | −1,544 ft | 29.7 | −969 ft |
| March | 32.8 | −752 ft | 41.5 | −152 ft |
| April | 45.1 | 92 ft | 54.8 | 741 ft |
| May | 57.1 | 892 ft | 67.4 | 1,561 ft |
| June | 67.3 | 1,554 ft | 77.3 | 2,188 ft |
| July | 71.3 | 1,810 ft | 81.3 | 2,438 ft |
| August | 69.4 | 1,689 ft | 79.2 | 2,307 ft |
| September | 61.7 | 1,193 ft | 72.0 | 1,854 ft |
| October | 49.3 | 375 ft | 58.5 | 984 ft |
| November | 36.3 | −509 ft | 44.1 | 25 ft |
| December | 24.8 | −1,316 ft | 31.7 | −829 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 KOSH
DENSITY ALTITUDE
Field elevation 809 ft — the air behaves like 2,419 ft.
- PRESSURE ALT
- 810 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
- KFLD — Fond Du Lac County
Fond Du Lac · elev 809 ft
- 11Y — Flying Feathers
Chilton · elev 913 ft
- KATW — Appleton International
Appleton · elev 918 ft
- 8D1 — New Holstein Municipal
New Holstein · elev 992 ft
- W34 — Shiocton
Shiocton · elev 760 ft
- KPCZ — Waupaca Municipal
Waupaca · elev 840 ft
- W23 — Wild Rose Idlewild
Wild Rose · elev 908 ft
Frequently asked questions
How high does density altitude get at KOSH in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Wittman Regional reaches roughly 2,438 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 KOSH on an average day?
It swings with the seasons: from roughly −1,768 ft at the coldest month's average temperature to about 1,810 ft at the warmest month's — all from a constant field elevation of 809 ft. The month-by-month table above carries the full year.
What is the field elevation of Wittman Regional?
809 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOSH (ICAO) / OSH (FAA), in Oshkosh, Wisconsin.