Delavan, Wisconsin · field elev 981 ft
Density Altitude at Lake Lawn (C59)
Lake Lawn sits at 981 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,747 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 | 21.3 | −1,350 ft | 29.2 | −789 ft |
| February | 24.3 | −1,136 ft | 32.6 | −552 ft |
| March | 34.3 | −433 ft | 43.7 | 211 ft |
| April | 46.4 | 393 ft | 57.0 | 1,098 ft |
| May | 57.9 | 1,157 ft | 68.8 | 1,861 ft |
| June | 67.9 | 1,804 ft | 79.0 | 2,505 ft |
| July | 71.9 | 2,059 ft | 82.9 | 2,747 ft |
| August | 70.0 | 1,938 ft | 81.1 | 2,635 ft |
| September | 62.7 | 1,469 ft | 74.2 | 2,204 ft |
| October | 50.2 | 648 ft | 60.8 | 1,346 ft |
| November | 37.6 | −206 ft | 46.2 | 380 ft |
| December | 27.1 | −937 ft | 34.5 | −420 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 C59
DENSITY ALTITUDE
Field elevation 981 ft — the air behaves like 2,753 ft.
- PRESSURE ALT
- 982 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
- 7V3 — Big Foot Airfield
Walworth · elev 948 ft
- KBUU — Burlington Municipal
Burlington · elev 780 ft
- 57C — East Troy Municipal
East Troy · elev 860 ft
- 5Y3 — Gutzmer'S Twin Oaks
Whitewater · elev 821 ft
- 88C — Palmyra Municipal
Palmyra · elev 851 ft
- 44C — Beloit
Beloit · elev 817 ft
- KJVL — Southern Wisconsin Regional
Janesville · elev 808 ft
- 49C — Camp Lake
Camp Lake · elev 749 ft
Frequently asked questions
How high does density altitude get at C59 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Lake Lawn reaches roughly 2,747 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 C59 on an average day?
It swings with the seasons: from roughly −1,350 ft at the coldest month's average temperature to about 2,059 ft at the warmest month's — all from a constant field elevation of 981 ft. The month-by-month table above carries the full year.
What is the field elevation of Lake Lawn?
981 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is C59 (FAA), in Delavan, Wisconsin.