Lucile, Idaho · field elev 1,236 ft
Density Altitude at Big Bar Usfs (1DA)
Big Bar Usfs sits at 1,236 ft, and even a typical August afternoon (90 °F) only lifts density altitude to about 3,492 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 | 32.6 | −233 ft | 40.5 | 310 ft |
| February | 35.9 | −5 ft | 46.1 | 689 ft |
| March | 42.6 | 453 ft | 54.9 | 1,275 ft |
| April | 48.4 | 844 ft | 62.1 | 1,744 ft |
| May | 55.9 | 1,340 ft | 70.7 | 2,295 ft |
| June | 62.3 | 1,757 ft | 77.7 | 2,735 ft |
| July | 71.1 | 2,320 ft | 89.8 | 3,480 ft |
| August | 71.0 | 2,314 ft | 90.0 | 3,492 ft |
| September | 62.4 | 1,764 ft | 79.5 | 2,847 ft |
| October | 49.9 | 944 ft | 63.5 | 1,835 ft |
| November | 38.7 | 187 ft | 48.3 | 837 ft |
| December | 32.0 | −275 ft | 39.6 | 249 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 1DA
DENSITY ALTITUDE
Field elevation 1,236 ft — the air behaves like 3,492 ft.
- PRESSURE ALT
- 1,237 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
- 1S7 — Slate Creek
Slate Creek · elev 1,660 ft
- I45 — Wapshilla
Winchester · elev 1,415 ft
- KGIC — Idaho County
Grangeville · elev 3,313 ft
- S84 — Cottonwood Municipal
Cottonwood · elev 3,474 ft
- 1U4 — New Meadows
New Meadows · elev 3,908 ft
- 3U1 — Warren /Usfs/
Warren · elev 5,902 ft
- A05 — Dixie Usfs
Dixie · elev 5,148 ft
- S82 — Kooskia Municipal
Kooskia · elev 1,263 ft
Frequently asked questions
How high does density altitude get at 1DA in summer?
On a typical August afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Big Bar Usfs reaches roughly 3,492 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 1DA on an average day?
It swings with the seasons: from roughly −275 ft at the coldest month's average temperature to about 2,320 ft at the warmest month's — all from a constant field elevation of 1,236 ft. The month-by-month table above carries the full year.
What is the field elevation of Big Bar Usfs?
1,236 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1DA (FAA), in Lucile, Idaho.