Dowagiac, Michigan · field elev 747 ft
Density Altitude at Dowagiac Municipal (C91)
Dowagiac Municipal sits at 747 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,374 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 | 23.7 | −1,472 ft | 31.1 | −949 ft |
| February | 25.9 | −1,315 ft | 34.2 | −732 ft |
| March | 34.8 | −691 ft | 44.4 | −32 ft |
| April | 46.4 | 103 ft | 57.4 | 835 ft |
| May | 57.9 | 868 ft | 68.6 | 1,561 ft |
| June | 67.4 | 1,484 ft | 78.0 | 2,156 ft |
| July | 70.8 | 1,702 ft | 81.5 | 2,374 ft |
| August | 69.0 | 1,587 ft | 79.7 | 2,262 ft |
| September | 62.1 | 1,142 ft | 73.5 | 1,873 ft |
| October | 50.3 | 365 ft | 60.9 | 1,064 ft |
| November | 39.0 | −401 ft | 47.2 | 157 ft |
| December | 29.4 | −1,068 ft | 36.2 | −594 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 C91
DENSITY ALTITUDE
Field elevation 747 ft — the air behaves like 2,405 ft.
- PRESSURE ALT
- 748 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
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- KLWA — South Haven Area Regional
South Haven · elev 666 ft
- KHAI — Three Rivers Municipal/Dr Haines
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- 4N0 — Newmans
Kalamazoo · elev 840 ft
Frequently asked questions
How high does density altitude get at C91 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Dowagiac Municipal reaches roughly 2,374 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 C91 on an average day?
It swings with the seasons: from roughly −1,472 ft at the coldest month's average temperature to about 1,702 ft at the warmest month's — all from a constant field elevation of 747 ft. The month-by-month table above carries the full year.
What is the field elevation of Dowagiac Municipal?
747 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is C91 (FAA), in Dowagiac, Michigan.