Cheboygan, Michigan · field elev 640 ft
Density Altitude at Cheboygan County (KSLH)
Cheboygan County sits at 640 ft, and even a typical July afternoon (77 °F) only lifts density altitude to about 1,988 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 | 19.3 | −1,922 ft | 27.2 | −1,357 ft |
| February | 19.7 | −1,893 ft | 29.0 | −1,230 ft |
| March | 27.8 | −1,315 ft | 37.6 | −630 ft |
| April | 39.5 | −499 ft | 49.0 | 145 ft |
| May | 51.5 | 313 ft | 61.8 | 991 ft |
| June | 61.9 | 997 ft | 72.1 | 1,653 ft |
| July | 67.6 | 1,366 ft | 77.4 | 1,988 ft |
| August | 66.8 | 1,314 ft | 76.6 | 1,937 ft |
| September | 59.5 | 841 ft | 69.5 | 1,487 ft |
| October | 47.6 | 51 ft | 56.3 | 631 ft |
| November | 36.6 | −699 ft | 43.7 | −213 ft |
| December | 26.9 | −1,378 ft | 33.4 | −922 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 KSLH
DENSITY ALTITUDE
Field elevation 640 ft — the air behaves like 1,963 ft.
- PRESSURE ALT
- 641 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
- 6Y1 — Bois Blanc Island
Bois Blanc Island · elev 664 ft
- Y30 — Pbeaaye
Topinabee · elev 690 ft
- 2M7 — Hoffman'S Black Mountain Aerodrome
Cheboygan · elev 677 ft
- KPLN — Pellston Regional/Emmet County
Pellston · elev 721 ft
- KMCD — Mackinac Island
Mackinac Island · elev 741 ft
- Y65 — Campbell-Pratt
Indian River · elev 614 ft
- 83D — Mackinac County
St Ignace · elev 624 ft
- KMGN — Harbor Springs
Harbor Springs · elev 686 ft
Frequently asked questions
How high does density altitude get at KSLH in summer?
On a typical July afternoon — around 77 °F at the nearest NOAA normals station — density altitude at Cheboygan County reaches roughly 1,988 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 KSLH on an average day?
It swings with the seasons: from roughly −1,922 ft at the coldest month's average temperature to about 1,366 ft at the warmest month's — all from a constant field elevation of 640 ft. The month-by-month table above carries the full year.
What is the field elevation of Cheboygan County?
640 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSLH (ICAO) / SLH (FAA), in Cheboygan, Michigan.