Oscoda, Michigan · field elev 633 ft
Density Altitude at Oscoda/Wurtsmith (KOSC)
Oscoda/Wurtsmith sits at 633 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,154 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 | 21.5 | −1,773 ft | 29.7 | −1,190 ft |
| February | 22.6 | −1,694 ft | 32.3 | −1,007 ft |
| March | 30.9 | −1,105 ft | 40.8 | −419 ft |
| April | 42.2 | −323 ft | 52.2 | 351 ft |
| May | 54.4 | 497 ft | 64.9 | 1,183 ft |
| June | 64.2 | 1,138 ft | 75.2 | 1,841 ft |
| July | 69.2 | 1,460 ft | 80.2 | 2,154 ft |
| August | 67.8 | 1,370 ft | 78.8 | 2,067 ft |
| September | 60.4 | 891 ft | 71.7 | 1,619 ft |
| October | 48.4 | 96 ft | 58.8 | 786 ft |
| November | 37.3 | −660 ft | 45.5 | −99 ft |
| December | 27.8 | −1,324 ft | 35.0 | −819 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 KOSC
DENSITY ALTITUDE
Field elevation 633 ft — the air behaves like 2,142 ft.
- PRESSURE ALT
- 634 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 Michigan fields
- 6D9 — Iosco County
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- 29C — Grindstone Air Harbor
Port Austin · elev 640 ft
- 51M — Oscoda County/Dennis Kauffman Meml
Mio · elev 1,033 ft
- Y31 — West Branch Community
West Branch · elev 882 ft
- KAPN — Alpena County Regional
Alpena · elev 690 ft
- E53 — Engler Field
Bad Axe · elev 725 ft
Frequently asked questions
How high does density altitude get at KOSC in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Oscoda/Wurtsmith reaches roughly 2,154 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 KOSC on an average day?
It swings with the seasons: from roughly −1,773 ft at the coldest month's average temperature to about 1,460 ft at the warmest month's — all from a constant field elevation of 633 ft. The month-by-month table above carries the full year.
What is the field elevation of Oscoda/Wurtsmith?
633 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOSC (ICAO) / OSC (FAA), in Oscoda, Michigan.