Mackay, Idaho · field elev 7,920 ft
Density Altitude at Copper Basin (0U2)
Copper Basin is a genuine high-and-hot field: from 7,920 ft of elevation, a typical July afternoon (82 °F) pushes density altitude to about 11,129 ft — the airplane performs like it is 3,209 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 | 19.0 | 7,154 ft | 30.5 | 7,923 ft ▲ |
| February | 22.4 | 7,383 ft | 33.7 | 8,133 ft ⚠ |
| March | 32.3 | 8,041 ft | 43.6 | 8,772 ft ⚠ |
| April | 40.3 | 8,561 ft | 52.9 | 9,358 ft ⚠ |
| May | 48.7 | 9,095 ft | 62.6 | 9,956 ft ⚠ |
| June | 56.5 | 9,582 ft | 71.8 | 10,511 ft ⚠ |
| July | 64.5 | 10,072 ft | 82.3 | 11,129 ft ⚠ |
| August | 62.6 | 9,956 ft | 80.4 | 11,019 ft ⚠ |
| September | 54.3 | 9,446 ft | 71.5 | 10,493 ft ⚠ |
| October | 42.8 | 8,721 ft | 57.3 | 9,631 ft ⚠ |
| November | 29.3 | 7,843 ft | 40.5 | 8,573 ft ⚠ |
| December | 19.2 | 7,167 ft | 29.8 | 7,877 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 0U2
DENSITY ALTITUDE high DA
Field elevation 7,920 ft — the air behaves like 11,112 ft.
- PRESSURE ALT
- 7,922 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
- U62 — Mackay
Mackay · elev 5,892 ft
- U92 — Antelope Valley
Moore · elev 6,193 ft
- U61 — Twin Bridges
Ketchum · elev 6,900 ft
- KAOC — Arco-Butte County
Arco · elev 5,335 ft
- KSUN — Friedman Meml
Hailey · elev 5,320 ft
- U65 — Carey
Carey · elev 4,789 ft
- 0U7 — Hollow Top
Carey · elev 5,359 ft
- U97 — Howe
Howe · elev 4,930 ft
Frequently asked questions
How high does density altitude get at 0U2 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Copper Basin reaches roughly 11,129 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 0U2 on an average day?
It swings with the seasons: from roughly 7,154 ft at the coldest month's average temperature to about 10,072 ft at the warmest month's — all from a constant field elevation of 7,920 ft. The month-by-month table above carries the full year.
What is the field elevation of Copper Basin?
7,920 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 0U2 (FAA), in Mackay, Idaho.