Vernonia, Oregon · field elev 650 ft
Density Altitude at Vernonia Municipal (05S)
Vernonia Municipal sits at 650 ft, and even a typical August afternoon (78 °F) only lifts density altitude to about 2,050 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 | 38.7 | −542 ft | 45.7 | −65 ft |
| February | 40.2 | −439 ft | 49.4 | 185 ft |
| March | 43.5 | −214 ft | 53.6 | 465 ft |
| April | 47.1 | 30 ft | 58.6 | 794 ft |
| May | 52.9 | 418 ft | 65.5 | 1,243 ft |
| June | 57.2 | 702 ft | 69.9 | 1,525 ft |
| July | 62.3 | 1,036 ft | 77.3 | 1,994 ft |
| August | 62.5 | 1,049 ft | 78.2 | 2,050 ft |
| September | 58.0 | 755 ft | 73.1 | 1,729 ft |
| October | 49.8 | 211 ft | 61.4 | 977 ft |
| November | 42.4 | −289 ft | 50.6 | 265 ft |
| December | 37.8 | −604 ft | 44.3 | −159 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 05S
DENSITY ALTITUDE
Field elevation 650 ft — the air behaves like 2,037 ft.
- PRESSURE ALT
- 651 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
- KSPB — Scappoose
Scappoose · elev 58 ft
- 4S4 — Skyport
Cornelius · elev 174 ft
- KHIO — Portland-Hillsboro
Portland · elev 208 ft
- 7S3 — Stark'S Twin Oaks Airpark
Hillsboro · elev 170 ft
- 56S — Seaside Municipal
Seaside · elev 12 ft
- 3S7 — Nehalem Bay State
Manzanita · elev 30 ft
- KPDX — Portland International
Portland · elev 31 ft
- KAST — Astoria Regional
Astoria · elev 15 ft
Frequently asked questions
How high does density altitude get at 05S in summer?
On a typical August afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Vernonia Municipal reaches roughly 2,050 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 05S on an average day?
It swings with the seasons: from roughly −604 ft at the coldest month's average temperature to about 1,049 ft at the warmest month's — all from a constant field elevation of 650 ft. The month-by-month table above carries the full year.
What is the field elevation of Vernonia Municipal?
650 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 05S (FAA), in Vernonia, Oregon.