Sturtevant, Wisconsin · field elev 789 ft
Density Altitude at Sylvania (C89)
Sylvania sits at 789 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,388 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 | 19.9 | −1,692 ft | 28.1 | −1,107 ft |
| February | 23.5 | −1,434 ft | 31.9 | −840 ft |
| March | 33.8 | −708 ft | 43.1 | −68 ft |
| April | 44.7 | 40 ft | 54.8 | 716 ft |
| May | 55.9 | 788 ft | 66.4 | 1,472 ft |
| June | 66.0 | 1,446 ft | 76.3 | 2,101 ft |
| July | 70.7 | 1,747 ft | 80.9 | 2,388 ft |
| August | 68.6 | 1,613 ft | 78.9 | 2,264 ft |
| September | 61.3 | 1,142 ft | 72.4 | 1,855 ft |
| October | 49.4 | 357 ft | 59.8 | 1,044 ft |
| November | 36.8 | −500 ft | 45.4 | 88 ft |
| December | 25.9 | −1,263 ft | 33.5 | −729 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 C89
DENSITY ALTITUDE
Field elevation 789 ft — the air behaves like 2,395 ft.
- PRESSURE ALT
- 790 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
- KENW — Kenosha Regional
Kenosha · elev 743 ft
- KRAC — Batten International
Racine · elev 674 ft
- 62C — Cindy Guntly Meml
Franksville · elev 784 ft
- 49C — Camp Lake
Camp Lake · elev 749 ft
- KMKE — General Mitchell International
Milwaukee · elev 728 ft
- KBUU — Burlington Municipal
Burlington · elev 780 ft
- 57C — East Troy Municipal
East Troy · elev 860 ft
- KUES — Waukesha County
Waukesha · elev 912 ft
Frequently asked questions
How high does density altitude get at C89 in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Sylvania reaches roughly 2,388 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 C89 on an average day?
It swings with the seasons: from roughly −1,692 ft at the coldest month's average temperature to about 1,747 ft at the warmest month's — all from a constant field elevation of 789 ft. The month-by-month table above carries the full year.
What is the field elevation of Sylvania?
789 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is C89 (FAA), in Sturtevant, Wisconsin.