Astoria, Oregon · field elev 15 ft
Density Altitude at Astoria Regional (KAST)
Astoria Regional sits at 15 ft, and even a typical August afternoon (69 °F) only lifts density altitude to about 668 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 | 43.7 | −989 ft | 49.4 | −603 ft |
| February | 44.2 | −955 ft | 50.9 | −502 ft |
| March | 46.0 | −833 ft | 53.0 | −361 ft |
| April | 48.7 | −650 ft | 55.9 | −168 ft |
| May | 53.4 | −335 ft | 60.5 | 135 ft |
| June | 57.3 | −75 ft | 64.0 | 364 ft |
| July | 60.6 | 142 ft | 67.4 | 584 ft |
| August | 61.3 | 188 ft | 68.7 | 668 ft |
| September | 59.0 | 37 ft | 67.6 | 597 ft |
| October | 52.8 | −375 ft | 60.7 | 148 ft |
| November | 46.9 | −772 ft | 53.6 | −321 ft |
| December | 43.2 | −1,024 ft | 48.7 | −650 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 KAST
DENSITY ALTITUDE
Field elevation 15 ft — the air behaves like 687 ft.
- PRESSURE ALT
- 16 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
- 56S — Seaside Municipal
Seaside · elev 12 ft
- 3S7 — Nehalem Bay State
Manzanita · elev 30 ft
- 05S — Vernonia Municipal
Vernonia · elev 650 ft
- KTMK — Tillamook
Tillamook · elev 39 ft
- KSPB — Scappoose
Scappoose · elev 58 ft
- 4S4 — Skyport
Cornelius · elev 174 ft
- KHIO — Portland-Hillsboro
Portland · elev 208 ft
- KPFC — Pacific City State
Pacific City · elev 10 ft
Frequently asked questions
How high does density altitude get at KAST in summer?
On a typical August afternoon — around 69 °F at the nearest NOAA normals station — density altitude at Astoria Regional reaches roughly 668 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 KAST on an average day?
It swings with the seasons: from roughly −1,024 ft at the coldest month's average temperature to about 188 ft at the warmest month's — all from a constant field elevation of 15 ft. The month-by-month table above carries the full year.
What is the field elevation of Astoria Regional?
15 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KAST (ICAO) / AST (FAA), in Astoria, Oregon.