Eureka, South Dakota · field elev 1,935 ft
Density Altitude at Eureka Municipal (3W8)
Eureka Municipal sits at 1,935 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 3,861 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 | 11.2 | −881 ft | 20.5 | −211 ft |
| February | 15.3 | −584 ft | 25.0 | 108 ft |
| March | 27.9 | 312 ft | 38.3 | 1,029 ft |
| April | 41.9 | 1,273 ft | 54.3 | 2,098 ft |
| May | 54.5 | 2,111 ft | 66.7 | 2,898 ft |
| June | 64.5 | 2,758 ft | 76.1 | 3,490 ft |
| July | 70.0 | 3,108 ft | 82.1 | 3,861 ft |
| August | 68.3 | 3,000 ft | 81.0 | 3,793 ft |
| September | 58.9 | 2,398 ft | 71.9 | 3,227 ft |
| October | 43.7 | 1,395 ft | 55.5 | 2,177 ft |
| November | 28.6 | 361 ft | 38.6 | 1,050 ft |
| December | 16.6 | −490 ft | 25.4 | 136 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 3W8
DENSITY ALTITUDE
Field elevation 1,935 ft — the air behaves like 3,855 ft.
- PRESSURE ALT
- 1,936 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
- 5T4 — Herreid Municipal
Herreid · elev 1,725 ft
- 8SD — Bowdle Municipal
Bowdle · elev 1,963 ft
- 9F8 — Hoven Municipal
Hoven · elev 1,885 ft
- KMBG — Mobridge Municipal
Mobridge · elev 1,716 ft
- 5P2 — Mc Laughlin Municipal
Mc Laughlin · elev 2,008 ft
- 0D8 — Gettysburg Municipal
Gettysburg · elev 2,062 ft
- 3FU — Faulkton Municipal
Faulkton · elev 1,571 ft
- KABR — Aberdeen Regional
Aberdeen · elev 1,302 ft
Frequently asked questions
How high does density altitude get at 3W8 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Eureka Municipal reaches roughly 3,861 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 3W8 on an average day?
It swings with the seasons: from roughly −881 ft at the coldest month's average temperature to about 3,108 ft at the warmest month's — all from a constant field elevation of 1,935 ft. The month-by-month table above carries the full year.
What is the field elevation of Eureka Municipal?
1,935 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3W8 (FAA), in Eureka, South Dakota.