Imnaha, Oregon · field elev 1,370 ft
Density Altitude at Sluice Creek (O68)
Sluice Creek sits at 1,370 ft, and even a typical August afternoon (90 °F) only lifts density altitude to about 3,655 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 | −66 ft | 40.5 | 477 ft |
| February | 35.9 | 162 ft | 46.1 | 856 ft |
| March | 42.6 | 619 ft | 54.9 | 1,440 ft |
| April | 48.4 | 1,010 ft | 62.1 | 1,909 ft |
| May | 55.9 | 1,506 ft | 70.7 | 2,459 ft |
| June | 62.3 | 1,922 ft | 77.7 | 2,899 ft |
| July | 71.1 | 2,485 ft | 89.8 | 3,643 ft |
| August | 71.0 | 2,478 ft | 90.0 | 3,655 ft |
| September | 62.4 | 1,929 ft | 79.5 | 3,011 ft |
| October | 49.9 | 1,109 ft | 63.5 | 2,000 ft |
| November | 38.7 | 354 ft | 48.3 | 1,003 ft |
| December | 32.0 | −108 ft | 39.6 | 416 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 O68
DENSITY ALTITUDE
Field elevation 1,370 ft — the air behaves like 3,655 ft.
- PRESSURE ALT
- 1,371 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
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- O48 — Salmon Bar
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- KJSY — Joseph State
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- 8S4 — Enterprise Municipal
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Frequently asked questions
How high does density altitude get at O68 in summer?
On a typical August afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Sluice Creek reaches roughly 3,655 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 O68 on an average day?
It swings with the seasons: from roughly −108 ft at the coldest month's average temperature to about 2,485 ft at the warmest month's — all from a constant field elevation of 1,370 ft. The month-by-month table above carries the full year.
What is the field elevation of Sluice Creek?
1,370 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is O68 (FAA), in Imnaha, Oregon.