Crystal Falls, Michigan · field elev 1,340 ft
Density Altitude at Iron County (50D)
Iron County sits at 1,340 ft, and even a typical July afternoon (78 °F) only lifts density altitude to about 2,850 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 | 12.6 | −1,528 ft | 21.9 | −857 ft |
| February | 15.1 | −1,346 ft | 26.1 | −559 ft |
| March | 25.4 | −608 ft | 36.8 | 187 ft |
| April | 38.4 | 296 ft | 49.5 | 1,046 ft |
| May | 51.9 | 1,205 ft | 63.8 | 1,982 ft |
| June | 61.6 | 1,840 ft | 73.2 | 2,581 ft |
| July | 66.0 | 2,123 ft | 77.5 | 2,850 ft |
| August | 64.0 | 1,995 ft | 75.5 | 2,725 ft |
| September | 56.3 | 1,495 ft | 67.6 | 2,226 ft |
| October | 43.8 | 663 ft | 53.8 | 1,331 ft |
| November | 30.9 | −222 ft | 38.8 | 324 ft |
| December | 19.2 | −1,050 ft | 27.1 | −488 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 50D
DENSITY ALTITUDE
Field elevation 1,340 ft — the air behaves like 2,881 ft.
- PRESSURE ALT
- 1,341 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
- KIMT — Ford
Iron Mountain Kingsford · elev 1,182 ft
- Y73 — Stambaugh
Iron River · elev 1,618 ft
- M61 — Edward F Johnson
Ishpeming · elev 1,446 ft
- 6Y9 — Prickett-Grooms Field
Sidnaw · elev 1,377 ft
- KSAW — Marquette/Sawyer Regional
Marquette · elev 1,205 ft
- 6Y4 — Van Effen Field
Rock · elev 970 ft
- KESC — Delta County
Escanaba · elev 609 ft
- KMNM — Menominee Regional
Menominee · elev 625 ft
Frequently asked questions
How high does density altitude get at 50D in summer?
On a typical July afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Iron County reaches roughly 2,850 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 50D on an average day?
It swings with the seasons: from roughly −1,528 ft at the coldest month's average temperature to about 2,123 ft at the warmest month's — all from a constant field elevation of 1,340 ft. The month-by-month table above carries the full year.
What is the field elevation of Iron County?
1,340 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 50D (FAA), in Crystal Falls, Michigan.