Herreid, South Dakota · field elev 1,725 ft
Density Altitude at Herreid Municipal (5T4)
Herreid Municipal sits at 1,725 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 3,807 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 | 13.5 | −978 ft | 24.1 | −218 ft |
| February | 18.2 | −639 ft | 29.0 | 126 ft |
| March | 30.6 | 238 ft | 41.9 | 1,013 ft |
| April | 44.7 | 1,202 ft | 57.8 | 2,068 ft |
| May | 56.9 | 2,009 ft | 69.8 | 2,838 ft |
| June | 66.8 | 2,647 ft | 79.0 | 3,413 ft |
| July | 72.6 | 3,014 ft | 85.4 | 3,807 ft |
| August | 70.9 | 2,907 ft | 84.3 | 3,740 ft |
| September | 61.5 | 2,307 ft | 75.2 | 3,177 ft |
| October | 46.3 | 1,309 ft | 58.3 | 2,100 ft |
| November | 31.0 | 266 ft | 41.3 | 972 ft |
| December | 18.6 | −610 ft | 28.3 | 77 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 5T4
DENSITY ALTITUDE
Field elevation 1,725 ft — the air behaves like 3,782 ft.
- PRESSURE ALT
- 1,726 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- 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
- 3W8 — Eureka Municipal
Eureka · elev 1,935 ft
- KMBG — Mobridge Municipal
Mobridge · elev 1,716 ft
- 8SD — Bowdle Municipal
Bowdle · elev 1,963 ft
- 5P2 — Mc Laughlin Municipal
Mc Laughlin · elev 2,008 ft
- 9F8 — Hoven Municipal
Hoven · elev 1,885 ft
- D58 — Timber Lake Municipal
Timber Lake · elev 2,193 ft
- 0D8 — Gettysburg Municipal
Gettysburg · elev 2,062 ft
- 3Y7 — Isabel Municipal
Isabel · elev 2,398 ft
Frequently asked questions
How high does density altitude get at 5T4 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Herreid Municipal reaches roughly 3,807 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 5T4 on an average day?
It swings with the seasons: from roughly −978 ft at the coldest month's average temperature to about 3,014 ft at the warmest month's — all from a constant field elevation of 1,725 ft. The month-by-month table above carries the full year.
What is the field elevation of Herreid Municipal?
1,725 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5T4 (FAA), in Herreid, South Dakota.