Eagle Butte, South Dakota · field elev 2,449 ft
Density Altitude at Cheyenne Eagle Butte (84D)
Cheyenne Eagle Butte sits at 2,449 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 4,977 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 | 20.6 | 441 ft | 31.4 | 1,196 ft |
| February | 24.1 | 688 ft | 35.1 | 1,450 ft |
| March | 35.2 | 1,457 ft | 47.9 | 2,311 ft |
| April | 46.8 | 2,238 ft | 60.7 | 3,146 ft |
| May | 57.9 | 2,966 ft | 71.7 | 3,844 ft |
| June | 68.3 | 3,630 ft | 82.3 | 4,499 ft |
| July | 75.2 | 4,062 ft | 90.2 | 4,977 ft |
| August | 73.9 | 3,981 ft | 89.5 | 4,935 ft |
| September | 64.4 | 3,383 ft | 80.0 | 4,358 ft |
| October | 49.1 | 2,391 ft | 62.6 | 3,268 ft |
| November | 34.6 | 1,416 ft | 46.2 | 2,199 ft |
| December | 23.7 | 660 ft | 34.2 | 1,389 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 84D
DENSITY ALTITUDE
Field elevation 2,449 ft — the air behaves like 4,965 ft.
- PRESSURE ALT
- 2,450 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 South Dakota fields
- 3Y7 — Isabel Municipal
Isabel · elev 2,398 ft
- D58 — Timber Lake Municipal
Timber Lake · elev 2,193 ft
- D07 — Faith Municipal
Faith · elev 2,584 ft
- KMBG — Mobridge Municipal
Mobridge · elev 1,716 ft
- 98D — Onida Municipal
Onida · elev 1,885 ft
- 5P2 — Mc Laughlin Municipal
Mc Laughlin · elev 2,008 ft
- KPIR — Pierre Regional
Pierre · elev 1,744 ft
- 0D8 — Gettysburg Municipal
Gettysburg · elev 2,062 ft
Frequently asked questions
How high does density altitude get at 84D in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Cheyenne Eagle Butte reaches roughly 4,977 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 84D on an average day?
It swings with the seasons: from roughly 441 ft at the coldest month's average temperature to about 4,062 ft at the warmest month's — all from a constant field elevation of 2,449 ft. The month-by-month table above carries the full year.
What is the field elevation of Cheyenne Eagle Butte?
2,449 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 84D (FAA), in Eagle Butte, South Dakota.