Britton, South Dakota · field elev 1,318 ft
Density Altitude at Britton Municipal (KBTN)
Britton Municipal sits at 1,318 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 3,133 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 | 10.4 | −1,717 ft | 20.4 | −992 ft |
| February | 15.0 | −1,381 ft | 25.3 | −643 ft |
| March | 28.2 | −438 ft | 38.7 | 289 ft |
| April | 42.5 | 548 ft | 54.7 | 1,363 ft |
| May | 55.6 | 1,422 ft | 68.4 | 2,250 ft |
| June | 65.8 | 2,083 ft | 77.9 | 2,848 ft |
| July | 70.4 | 2,377 ft | 82.5 | 3,133 ft |
| August | 68.5 | 2,256 ft | 81.0 | 3,040 ft |
| September | 59.8 | 1,696 ft | 72.7 | 2,522 ft |
| October | 45.4 | 744 ft | 57.3 | 1,533 ft |
| November | 29.3 | −361 ft | 39.3 | 330 ft |
| December | 16.3 | −1,287 ft | 25.6 | −622 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 KBTN
DENSITY ALTITUDE
Field elevation 1,318 ft — the air behaves like 3,164 ft.
- PRESSURE ALT
- 1,319 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- WATER · GRAINS/LB
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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
- 2E6 — Groton Municipal
Groton · elev 1,310 ft
- 8D3 — Sisseton Municipal
Sisseton · elev 1,162 ft
- 1D7 — The Sigurd Anderson
Webster · elev 1,858 ft
- KABR — Aberdeen Regional
Aberdeen · elev 1,302 ft
- 8D7 — Clark County
Clark · elev 1,793 ft
- KATY — Watertown Regional
Watertown · elev 1,749 ft
- 1D1 — Milbank Municipal
Milbank · elev 1,118 ft
- 1D8 — Redfield Municipal
Redfield · elev 1,309 ft
Frequently asked questions
How high does density altitude get at KBTN in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Britton Municipal reaches roughly 3,133 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 KBTN on an average day?
It swings with the seasons: from roughly −1,717 ft at the coldest month's average temperature to about 2,377 ft at the warmest month's — all from a constant field elevation of 1,318 ft. The month-by-month table above carries the full year.
What is the field elevation of Britton Municipal?
1,318 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBTN (ICAO) / BTN (FAA), in Britton, South Dakota.