Bancroft, Idaho · field elev 5,435 ft
Density Altitude at Bancroft Municipal (U51)
Bancroft Municipal is a genuine high-and-hot field: from 5,435 ft of elevation, a typical July afternoon (85 °F) pushes density altitude to about 8,303 ft — the airplane performs like it is 2,868 ft above the field before the wheels roll.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 21.9 | 4,261 ft | 30.5 | 4,847 ft |
| February | 25.0 | 4,474 ft | 34.4 | 5,108 ft ▲ |
| March | 33.8 | 5,068 ft | 43.8 | 5,728 ft ▲ |
| April | 42.2 | 5,624 ft | 53.7 | 6,366 ft ▲ |
| May | 50.8 | 6,180 ft | 63.9 | 7,007 ft ▲ |
| June | 59.2 | 6,713 ft | 74.3 | 7,645 ft ▲ |
| July | 67.7 | 7,242 ft | 85.3 | 8,303 ft ⚠ |
| August | 66.3 | 7,155 ft | 84.1 | 8,232 ft ⚠ |
| September | 57.2 | 6,587 ft | 73.4 | 7,590 ft ▲ |
| October | 45.2 | 5,819 ft | 58.7 | 6,682 ft ▲ |
| November | 32.8 | 5,001 ft | 42.8 | 5,663 ft ▲ |
| December | 23.0 | 4,337 ft | 31.6 | 4,921 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 U51
DENSITY ALTITUDE high DA
Field elevation 5,435 ft — the air behaves like 8,285 ft.
- PRESSURE ALT
- 5,437 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 Idaho fields
- U78 — Allen H Tigert
Soda Springs · elev 5,843 ft
- 0ID — W E Ranch
Thatcher · elev 5,075 ft
- U58 — Downey/Hyde Meml/
Downey · elev 4,919 ft
- KPIH — Pocatello Regional
Pocatello · elev 4,452 ft
- U02 — Mccarley Field
Blackfoot · elev 4,492 ft
- 1U7 — Bear Lake County
Paris · elev 5,933 ft
- U10 — Preston
Preston · elev 4,728 ft
- KMLD — Malad City
Malad City · elev 4,503 ft
Frequently asked questions
How high does density altitude get at U51 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Bancroft Municipal reaches roughly 8,303 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 U51 on an average day?
It swings with the seasons: from roughly 4,261 ft at the coldest month's average temperature to about 7,242 ft at the warmest month's — all from a constant field elevation of 5,435 ft. The month-by-month table above carries the full year.
What is the field elevation of Bancroft Municipal?
5,435 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is U51 (FAA), in Bancroft, Idaho.