Greenwood/Wonder Lake, Illinois · field elev 875 ft
Density Altitude at Galt Field (10C)
Galt Field sits at 875 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,555 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 | 20.8 | −1,519 ft | 29.0 | −936 ft |
| February | 23.4 | −1,333 ft | 32.5 | −691 ft |
| March | 34.7 | −538 ft | 44.4 | 127 ft |
| April | 45.9 | 228 ft | 57.0 | 967 ft |
| May | 57.1 | 974 ft | 68.6 | 1,718 ft |
| June | 66.9 | 1,610 ft | 78.1 | 2,319 ft |
| July | 70.6 | 1,846 ft | 81.9 | 2,555 ft |
| August | 68.6 | 1,718 ft | 80.2 | 2,450 ft |
| September | 61.7 | 1,274 ft | 73.2 | 2,011 ft |
| October | 50.0 | 503 ft | 60.9 | 1,222 ft |
| November | 37.5 | −344 ft | 46.4 | 262 ft |
| December | 27.3 | −1,056 ft | 35.0 | −517 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 10C
DENSITY ALTITUDE
Field elevation 875 ft — the air behaves like 2,562 ft.
- PRESSURE ALT
- 876 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 Illinois fields
- 0C0 — Dacy
Harvard · elev 913 ft
- 3CK — Lake In The Hills
Chicago/Lake In The Hills · elev 887 ft
- C81 — Campbell
Grayslake · elev 788 ft
- C77 — Poplar Grove
Poplar Grove · elev 857 ft
- KUGN — Waukegan Ntl
Chicago/Waukegan · elev 728 ft
- KPWK — Chicago Exec
Chicago/Prospect Heights/Wheeling · elev 645 ft
- 06C — Schaumburg Regional
Chicago/Schaumburg · elev 801 ft
- KDPA — Dupage
Chicago/West Chicago · elev 759 ft
Frequently asked questions
How high does density altitude get at 10C in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Galt Field reaches roughly 2,555 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 10C on an average day?
It swings with the seasons: from roughly −1,519 ft at the coldest month's average temperature to about 1,846 ft at the warmest month's — all from a constant field elevation of 875 ft. The month-by-month table above carries the full year.
What is the field elevation of Galt Field?
875 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 10C (FAA), in Greenwood/Wonder Lake, Illinois.