Three Lakes, Wisconsin · field elev 1,637 ft
Density Altitude at Three Lakes Municipal (40D)
Three Lakes Municipal sits at 1,637 ft, and even a typical July afternoon (78 °F) only lifts density altitude to about 3,250 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 | 11.7 | −1,220 ft | 21.2 | −534 ft |
| February | 14.5 | −1,016 ft | 25.8 | −208 ft |
| March | 25.2 | −251 ft | 37.1 | 577 ft |
| April | 38.2 | 652 ft | 50.2 | 1,460 ft |
| May | 52.3 | 1,599 ft | 65.1 | 2,431 ft |
| June | 62.4 | 2,257 ft | 74.7 | 3,038 ft |
| July | 66.0 | 2,488 ft | 78.1 | 3,250 ft |
| August | 63.7 | 2,341 ft | 75.3 | 3,076 ft |
| September | 55.9 | 1,835 ft | 67.4 | 2,577 ft |
| October | 42.8 | 964 ft | 52.9 | 1,638 ft |
| November | 29.6 | 58 ft | 38.0 | 638 ft |
| December | 18.0 | −763 ft | 26.3 | −173 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 40D
DENSITY ALTITUDE
Field elevation 1,637 ft — the air behaves like 3,244 ft.
- PRESSURE ALT
- 1,638 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
- KEGV — Eagle River Union
Eagle River · elev 1,642 ft
- KRHI — Rhinelander/Oneida County
Rhinelander · elev 1,623 ft
- Y55 — Crandon/Steve Conway Municipal
Crandon · elev 1,650 ft
- KLNL — Kings Land O' Lakes
Land O' Lakes · elev 1,706 ft
- KARV — Lakeland/Noble F Lee Meml Field
Minocqua-Woodruff · elev 1,630 ft
- KBDJ — Boulder Junction Payzer
Boulder Junction · elev 1,662 ft
- KTKV — Tomahawk Regional
Tomahawk · elev 1,487 ft
- D25 — Manitowish Waters
Manitowish Waters · elev 1,610 ft
Frequently asked questions
How high does density altitude get at 40D in summer?
On a typical July afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Three Lakes Municipal reaches roughly 3,250 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 40D on an average day?
It swings with the seasons: from roughly −1,220 ft at the coldest month's average temperature to about 2,488 ft at the warmest month's — all from a constant field elevation of 1,637 ft. The month-by-month table above carries the full year.
What is the field elevation of Three Lakes Municipal?
1,637 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 40D (FAA), in Three Lakes, Wisconsin.