Black River Falls, Wisconsin · field elev 836 ft
Density Altitude at Black River Falls Area (KBCK)
Black River Falls Area sits at 836 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,471 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 | 14.0 | −2,061 ft | 24.0 | −1,339 ft |
| February | 18.8 | −1,712 ft | 29.3 | −964 ft |
| March | 31.0 | −844 ft | 41.4 | −126 ft |
| April | 43.9 | 44 ft | 55.5 | 820 ft |
| May | 56.2 | 866 ft | 67.6 | 1,607 ft |
| June | 66.3 | 1,523 ft | 77.5 | 2,234 ft |
| July | 70.0 | 1,760 ft | 81.3 | 2,471 ft |
| August | 67.8 | 1,619 ft | 79.4 | 2,352 ft |
| September | 59.9 | 1,109 ft | 71.7 | 1,868 ft |
| October | 46.3 | 207 ft | 57.9 | 978 ft |
| November | 33.1 | −698 ft | 42.4 | −57 ft |
| December | 20.7 | −1,575 ft | 29.2 | −971 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 KBCK
DENSITY ALTITUDE
Field elevation 836 ft — the air behaves like 2,452 ft.
- PRESSURE ALT
- 837 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 Wisconsin fields
- KCMY — Sparta/Fort Mc Coy
Sparta · elev 839 ft
- Y72 — Bloyer Field
Tomah · elev 966 ft
- KVIQ — Neillsville Municipal
Neillsville · elev 1,238 ft
- KLSE — La Crosse Regional
La Crosse · elev 655 ft
- KDAF — Necedah
Necedah · elev 919 ft
- KMFI — Marshfield Municipal
Marshfield · elev 1,278 ft
- 82C — Mauston/New Lisbon Union
New Lisbon · elev 908 ft
- Y51 — Viroqua Municipal
Viroqua · elev 1,292 ft
Frequently asked questions
How high does density altitude get at KBCK in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Black River Falls Area reaches roughly 2,471 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 KBCK on an average day?
It swings with the seasons: from roughly −2,061 ft at the coldest month's average temperature to about 1,760 ft at the warmest month's — all from a constant field elevation of 836 ft. The month-by-month table above carries the full year.
What is the field elevation of Black River Falls Area?
836 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBCK (ICAO) / BCK (FAA), in Black River Falls, Wisconsin.