Ephraim, Wisconsin · field elev 773 ft
Density Altitude at Ephraim/Gibraltar (3D2)
Ephraim/Gibraltar sits at 773 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,288 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 | 19.4 | −1,748 ft | 26.7 | −1,226 ft |
| February | 21.0 | −1,633 ft | 29.1 | −1,057 ft |
| March | 29.8 | −1,007 ft | 38.6 | −396 ft |
| April | 41.1 | −224 ft | 51.0 | 444 ft |
| May | 53.2 | 590 ft | 64.5 | 1,330 ft |
| June | 63.1 | 1,239 ft | 73.8 | 1,924 ft |
| July | 68.7 | 1,600 ft | 79.6 | 2,288 ft |
| August | 67.4 | 1,516 ft | 78.3 | 2,207 ft |
| September | 60.8 | 1,090 ft | 70.3 | 1,702 ft |
| October | 48.8 | 297 ft | 57.1 | 848 ft |
| November | 36.9 | −513 ft | 43.5 | −61 ft |
| December | 25.8 | −1,290 ft | 32.5 | −818 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 3D2
DENSITY ALTITUDE
Field elevation 773 ft — the air behaves like 2,313 ft.
- PRESSURE ALT
- 774 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
- 2P2 — Washington Island
Washington Island · elev 653 ft
- KSUE — Door County Cherryland
Sturgeon Bay · elev 724 ft
- KOCQ — Oconto/J Douglas Bake Municipal
Oconto · elev 604 ft
- 3D1 — Crivitz Municipal
Crivitz · elev 735 ft
- 7P5 — Piso
Suring · elev 895 ft
- 92C — Carter
Pulaski · elev 783 ft
- KGRB — Green Bay/Austin Straubel International
Green Bay · elev 695 ft
- KEZS — Shawano Municipal
Shawano · elev 813 ft
Frequently asked questions
How high does density altitude get at 3D2 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Ephraim/Gibraltar reaches roughly 2,288 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 3D2 on an average day?
It swings with the seasons: from roughly −1,748 ft at the coldest month's average temperature to about 1,600 ft at the warmest month's — all from a constant field elevation of 773 ft. The month-by-month table above carries the full year.
What is the field elevation of Ephraim/Gibraltar?
773 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3D2 (FAA), in Ephraim, Wisconsin.