Portland, Oregon · field elev 31 ft
Density Altitude at Portland International (KPDX)
Portland International sits at 31 ft, and even a typical August afternoon (82 °F) only lifts density altitude to about 1,549 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 | 41.9 | −1,093 ft | 47.5 | −711 ft |
| February | 44.1 | −942 ft | 51.5 | −442 ft |
| March | 48.3 | −657 ft | 56.8 | −89 ft |
| April | 52.8 | −355 ft | 62.0 | 253 ft |
| May | 59.4 | 83 ft | 69.3 | 726 ft |
| June | 64.2 | 397 ft | 74.3 | 1,046 ft |
| July | 70.2 | 784 ft | 81.9 | 1,524 ft |
| August | 70.6 | 810 ft | 82.3 | 1,549 ft |
| September | 65.4 | 475 ft | 76.7 | 1,198 ft |
| October | 55.6 | −168 ft | 64.4 | 410 ft |
| November | 47.1 | −738 ft | 53.5 | −308 ft |
| December | 41.6 | −1,113 ft | 46.9 | −752 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 KPDX
DENSITY ALTITUDE
Field elevation 31 ft — the air behaves like 1,531 ft.
- PRESSURE ALT
- 32 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
- KTTD — Portland-Troutdale
Portland · elev 39 ft
- KHIO — Portland-Hillsboro
Portland · elev 208 ft
- KSPB — Scappoose
Scappoose · elev 58 ft
- 7S3 — Stark'S Twin Oaks Airpark
Hillsboro · elev 170 ft
- 03S — Sandy River
Sandy · elev 704 ft
- 4S4 — Skyport
Cornelius · elev 174 ft
- KUAO — Aurora State
Aurora · elev 200 ft
- 4S9 — Mulino State
Portland-Mulino · elev 260 ft
Frequently asked questions
How high does density altitude get at KPDX in summer?
On a typical August afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Portland International reaches roughly 1,549 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 KPDX on an average day?
It swings with the seasons: from roughly −1,113 ft at the coldest month's average temperature to about 810 ft at the warmest month's — all from a constant field elevation of 31 ft. The month-by-month table above carries the full year.
What is the field elevation of Portland International?
31 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KPDX (ICAO) / PDX (FAA), in Portland, Oregon.