Imnaha, Oregon · field elev 947 ft
Density Altitude at Salmon Bar (O48)
Salmon Bar sits at 947 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 3,189 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 | 36.2 | −344 ft | 42.1 | 60 ft |
| February | 39.3 | −131 ft | 47.0 | 392 ft |
| March | 45.4 | 284 ft | 55.1 | 931 ft |
| April | 51.5 | 692 ft | 62.3 | 1,402 ft |
| May | 60.0 | 1,252 ft | 72.0 | 2,023 ft |
| June | 66.5 | 1,672 ft | 79.0 | 2,463 ft |
| July | 75.8 | 2,263 ft | 90.8 | 3,189 ft |
| August | 75.2 | 2,225 ft | 90.1 | 3,146 ft |
| September | 65.9 | 1,634 ft | 79.5 | 2,494 ft |
| October | 52.5 | 759 ft | 63.0 | 1,447 ft |
| November | 41.6 | 26 ft | 48.7 | 506 ft |
| December | 35.2 | −413 ft | 40.8 | −29 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 O48
DENSITY ALTITUDE
Field elevation 947 ft — the air behaves like 3,201 ft.
- PRESSURE ALT
- 948 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 Oregon fields
- OR8 — Dug Bar Usfs
Imnaha · elev 1,022 ft
- OR9 — Lord Flat Usfs
Imnaha · elev 5,594 ft
- O62 — B & H Usfs
Enterprise · elev 4,007 ft
- O29 — Pittsburg Landing
Imnaha · elev 1,185 ft
- 25U — Memaloose Usfs
Imnaha · elev 6,708 ft
- O68 — Sluice Creek
Imnaha · elev 1,370 ft
- 8S4 — Enterprise Municipal
Enterprise · elev 3,957 ft
- KJSY — Joseph State
Joseph · elev 4,126 ft
Frequently asked questions
How high does density altitude get at O48 in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Salmon Bar reaches roughly 3,189 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 O48 on an average day?
It swings with the seasons: from roughly −413 ft at the coldest month's average temperature to about 2,263 ft at the warmest month's — all from a constant field elevation of 947 ft. The month-by-month table above carries the full year.
What is the field elevation of Salmon Bar?
947 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is O48 (FAA), in Imnaha, Oregon.