Sixes, Oregon · field elev 202 ft
Density Altitude at Cape Blanco State (5S6)
Cape Blanco State sits at 202 ft, and even a typical August afternoon (70 °F) only lifts density altitude to about 969 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 | 47.1 | −526 ft | 54.6 | −23 ft |
| February | 47.2 | −519 ft | 55.2 | 17 ft |
| March | 48.0 | −465 ft | 56.2 | 83 ft |
| April | 50.0 | −330 ft | 58.1 | 208 ft |
| May | 53.9 | −70 ft | 62.2 | 477 ft |
| June | 56.8 | 123 ft | 64.9 | 653 ft |
| July | 60.2 | 346 ft | 68.6 | 892 ft |
| August | 60.7 | 379 ft | 69.8 | 969 ft |
| September | 59.2 | 281 ft | 69.3 | 937 ft |
| October | 55.0 | 3 ft | 64.6 | 633 ft |
| November | 49.9 | −337 ft | 57.8 | 189 ft |
| December | 46.3 | −580 ft | 53.7 | −83 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 5S6
DENSITY ALTITUDE
Field elevation 202 ft — the air behaves like 981 ft.
- PRESSURE ALT
- 203 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
- S05 — Bandon State
Bandon · elev 122 ft
- 6S6 — Powers
Powers · elev 326 ft
- 4S1 — Gold Beach Municipal
Gold Beach · elev 21 ft
- KOTH — Southwest Oregon Regional
North Bend · elev 17 ft
- 9S3 — Lakeside Municipal
Lakeside · elev 20 ft
- KBOK — Brookings
Brookings · elev 462 ft
- 5S1 — George Felt
Roseburg · elev 428 ft
- 16S — Myrtle Creek Municipal
Myrtle Creek · elev 619 ft
Frequently asked questions
How high does density altitude get at 5S6 in summer?
On a typical August afternoon — around 70 °F at the nearest NOAA normals station — density altitude at Cape Blanco State reaches roughly 969 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 5S6 on an average day?
It swings with the seasons: from roughly −580 ft at the coldest month's average temperature to about 379 ft at the warmest month's — all from a constant field elevation of 202 ft. The month-by-month table above carries the full year.
What is the field elevation of Cape Blanco State?
202 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5S6 (FAA), in Sixes, Oregon.