Bay City, Michigan · field elev 585 ft
Density Altitude at James Clements Municipal (3CM)
James Clements Municipal sits at 585 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,195 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 | 22.7 | −1,747 ft | 29.7 | −1,250 ft |
| February | 24.4 | −1,625 ft | 32.3 | −1,067 ft |
| March | 32.8 | −1,032 ft | 41.6 | −424 ft |
| April | 44.6 | −220 ft | 54.5 | 444 ft |
| May | 57.9 | 668 ft | 67.5 | 1,292 ft |
| June | 68.0 | 1,324 ft | 77.8 | 1,945 ft |
| July | 71.9 | 1,573 ft | 81.8 | 2,195 ft |
| August | 69.8 | 1,439 ft | 79.9 | 2,077 ft |
| September | 62.7 | 982 ft | 73.7 | 1,687 ft |
| October | 50.5 | 178 ft | 60.2 | 819 ft |
| November | 38.8 | −616 ft | 46.8 | −71 ft |
| December | 29.0 | −1,299 ft | 35.1 | −872 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 3CM
DENSITY ALTITUDE
Field elevation 585 ft — the air behaves like 2,208 ft.
- PRESSURE ALT
- 586 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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Frequently asked questions
How high does density altitude get at 3CM in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at James Clements Municipal reaches roughly 2,195 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 3CM on an average day?
It swings with the seasons: from roughly −1,747 ft at the coldest month's average temperature to about 1,573 ft at the warmest month's — all from a constant field elevation of 585 ft. The month-by-month table above carries the full year.
What is the field elevation of James Clements Municipal?
585 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3CM (FAA), in Bay City, Michigan.