Tomah, Wisconsin · field elev 966 ft
Density Altitude at Bloyer Field (Y72)
Bloyer Field sits at 966 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,617 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 | 14.8 | −1,839 ft | 24.2 | −1,162 ft |
| February | 18.6 | −1,563 ft | 29.1 | −815 ft |
| March | 30.5 | −717 ft | 41.1 | 16 ft |
| April | 43.5 | 179 ft | 54.9 | 941 ft |
| May | 55.9 | 1,007 ft | 67.6 | 1,766 ft |
| June | 65.7 | 1,644 ft | 77.0 | 2,361 ft |
| July | 69.5 | 1,888 ft | 81.1 | 2,617 ft |
| August | 67.4 | 1,754 ft | 79.1 | 2,493 ft |
| September | 59.3 | 1,230 ft | 71.3 | 2,002 ft |
| October | 47.0 | 415 ft | 57.9 | 1,138 ft |
| November | 33.5 | −508 ft | 42.6 | 118 ft |
| December | 21.3 | −1,369 ft | 29.7 | −773 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 Y72
DENSITY ALTITUDE
Field elevation 966 ft — the air behaves like 2,611 ft.
- PRESSURE ALT
- 967 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
- 82C — Mauston/New Lisbon Union
New Lisbon · elev 908 ft
- KDAF — Necedah
Necedah · elev 919 ft
- 60C — Elroy
Elroy · elev 944 ft
- KBCK — Black River Falls Area
Black River Falls · elev 836 ft
- Y51 — Viroqua Municipal
Viroqua · elev 1,292 ft
- 63C — Adams County Legion Field
Friendship (Adams) · elev 979 ft
- KLSE — La Crosse Regional
La Crosse · elev 655 ft
Frequently asked questions
How high does density altitude get at Y72 in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Bloyer Field reaches roughly 2,617 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 Y72 on an average day?
It swings with the seasons: from roughly −1,839 ft at the coldest month's average temperature to about 1,888 ft at the warmest month's — all from a constant field elevation of 966 ft. The month-by-month table above carries the full year.
What is the field elevation of Bloyer Field?
966 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is Y72 (FAA), in Tomah, Wisconsin.