Fond Du Lac, Wisconsin · field elev 809 ft
Density Altitude at Fond Du Lac County (KFLD)
Fond Du Lac County sits at 809 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,475 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 | 18.9 | −1,739 ft | 26.7 | −1,181 ft |
| February | 22.0 | −1,516 ft | 30.3 | −927 ft |
| March | 33.2 | −725 ft | 42.1 | −111 ft |
| April | 45.4 | 113 ft | 55.7 | 800 ft |
| May | 57.4 | 912 ft | 68.2 | 1,612 ft |
| June | 67.4 | 1,561 ft | 78.1 | 2,238 ft |
| July | 71.3 | 1,810 ft | 81.9 | 2,475 ft |
| August | 69.4 | 1,689 ft | 79.5 | 2,326 ft |
| September | 61.9 | 1,206 ft | 72.6 | 1,892 ft |
| October | 49.5 | 388 ft | 59.3 | 1,036 ft |
| November | 36.7 | −482 ft | 44.7 | 65 ft |
| December | 25.1 | −1,295 ft | 32.4 | −780 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 KFLD
DENSITY ALTITUDE
Field elevation 809 ft — the air behaves like 2,481 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
- KOSH — Wittman Regional
Oshkosh · elev 809 ft
- 8D1 — New Holstein Municipal
New Holstein · elev 992 ft
- 11Y — Flying Feathers
Chilton · elev 913 ft
- KUNU — Dodge County
Juneau · elev 934 ft
- 79C — Brennand
Neenah · elev 844 ft
- KHXF — Hartford Municipal
Hartford · elev 1,070 ft
- KETB — West Bend Municipal
West Bend · elev 888 ft
- KSBM — Sheboygan County Meml International
Sheboygan · elev 755 ft
Frequently asked questions
How high does density altitude get at KFLD in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Fond Du Lac County reaches roughly 2,475 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 KFLD on an average day?
It swings with the seasons: from roughly −1,739 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 Fond Du Lac County?
809 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KFLD (ICAO) / FLD (FAA), in Fond Du Lac, Wisconsin.