Beaver Island, Michigan · field elev 670 ft
Density Altitude at Beaver Island (KSJX)
Beaver Island sits at 670 ft, and even a typical July afternoon (76 °F) only lifts density altitude to about 1,943 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 | 21.0 | −1,762 ft | 26.7 | −1,355 ft |
| February | 21.3 | −1,741 ft | 28.3 | −1,242 ft |
| March | 29.2 | −1,178 ft | 37.2 | −621 ft |
| April | 40.2 | −414 ft | 49.2 | 196 ft |
| May | 52.3 | 403 ft | 62.6 | 1,080 ft |
| June | 61.9 | 1,034 ft | 71.7 | 1,664 ft |
| July | 67.2 | 1,377 ft | 76.1 | 1,943 ft |
| August | 66.9 | 1,358 ft | 75.0 | 1,873 ft |
| September | 60.0 | 911 ft | 67.6 | 1,403 ft |
| October | 48.4 | 142 ft | 54.9 | 575 ft |
| November | 37.5 | −600 ft | 43.1 | −216 ft |
| December | 27.9 | −1,270 ft | 32.9 | −919 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 KSJX
DENSITY ALTITUDE
Field elevation 670 ft — the air behaves like 1,936 ft.
- PRESSURE ALT
- 671 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
- 6Y8 — Welke
Beaver Island · elev 664 ft
- 6Y3 — North Fox Island
North Fox Island · elev 639 ft
- KCVX — Charlevoix Municipal
Charlevoix · elev 669 ft
- KISQ — Schoolcraft County
Manistique · elev 684 ft
- 5D5 — Woolsey Meml
Northport · elev 628 ft
- KMGN — Harbor Springs
Harbor Springs · elev 686 ft
- KPLN — Pellston Regional/Emmet County
Pellston · elev 721 ft
- 83D — Mackinac County
St Ignace · elev 624 ft
Frequently asked questions
How high does density altitude get at KSJX in summer?
On a typical July afternoon — around 76 °F at the nearest NOAA normals station — density altitude at Beaver Island reaches roughly 1,943 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 KSJX on an average day?
It swings with the seasons: from roughly −1,762 ft at the coldest month's average temperature to about 1,377 ft at the warmest month's — all from a constant field elevation of 670 ft. The month-by-month table above carries the full year.
What is the field elevation of Beaver Island?
670 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSJX (ICAO) / SJX (FAA), in Beaver Island, Michigan.