North Bend, Oregon · field elev 17 ft
Density Altitude at Southwest Oregon Regional (KOTH)
Southwest Oregon Regional sits at 17 ft, and even a typical August afternoon (67 °F) only lifts density altitude to about 580 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 | 47.3 | −742 ft | 53.5 | −325 ft |
| February | 47.6 | −722 ft | 54.1 | −285 ft |
| March | 48.5 | −661 ft | 55.1 | −219 ft |
| April | 50.4 | −533 ft | 56.7 | −113 ft |
| May | 54.2 | −279 ft | 60.5 | 138 ft |
| June | 57.4 | −66 ft | 63.5 | 334 ft |
| July | 59.8 | 92 ft | 66.1 | 503 ft |
| August | 60.4 | 131 ft | 67.3 | 580 ft |
| September | 59.0 | 39 ft | 66.7 | 542 ft |
| October | 54.9 | −232 ft | 62.8 | 288 ft |
| November | 50.2 | −546 ft | 56.8 | −106 ft |
| December | 46.7 | −783 ft | 52.9 | −365 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 KOTH
DENSITY ALTITUDE
Field elevation 17 ft — the air behaves like 561 ft.
- PRESSURE ALT
- 18 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
- 9S3 — Lakeside Municipal
Lakeside · elev 20 ft
- S05 — Bandon State
Bandon · elev 122 ft
- 6S6 — Powers
Powers · elev 326 ft
- 6S2 — Florence Municipal
Florence · elev 51 ft
- 5S6 — Cape Blanco State
Sixes · elev 202 ft
- 5S1 — George Felt
Roseburg · elev 428 ft
- KRBG — Roseburg Regional
Roseburg · elev 533 ft
- 16S — Myrtle Creek Municipal
Myrtle Creek · elev 619 ft
Frequently asked questions
How high does density altitude get at KOTH in summer?
On a typical August afternoon — around 67 °F at the nearest NOAA normals station — density altitude at Southwest Oregon Regional reaches roughly 580 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 KOTH on an average day?
It swings with the seasons: from roughly −783 ft at the coldest month's average temperature to about 131 ft at the warmest month's — all from a constant field elevation of 17 ft. The month-by-month table above carries the full year.
What is the field elevation of Southwest Oregon Regional?
17 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOTH (ICAO) / OTH (FAA), in North Bend, Oregon.