Newberg, Oregon · field elev 190 ft
Density Altitude at Chehalem Airpark (17S)
Chehalem Airpark sits at 190 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 1,806 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 | 41.2 | −943 ft | 46.7 | −568 ft |
| February | 43.5 | −786 ft | 50.6 | −305 ft |
| March | 47.0 | −548 ft | 55.7 | 35 ft |
| April | 51.0 | −278 ft | 61.6 | 423 ft |
| May | 57.9 | 180 ft | 69.5 | 935 ft |
| June | 62.7 | 495 ft | 75.0 | 1,285 ft |
| July | 68.7 | 883 ft | 83.3 | 1,806 ft |
| August | 68.4 | 864 ft | 83.2 | 1,800 ft |
| September | 63.7 | 560 ft | 77.2 | 1,424 ft |
| October | 54.1 | −71 ft | 63.7 | 560 ft |
| November | 45.6 | −643 ft | 52.5 | −178 ft |
| December | 40.4 | −998 ft | 45.7 | −636 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 17S
DENSITY ALTITUDE
Field elevation 190 ft — the air behaves like 1,787 ft.
- PRESSURE ALT
- 191 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
- 2S6 — Sportsman Airpark
Newberg · elev 181 ft
- 7S3 — Stark'S Twin Oaks Airpark
Hillsboro · elev 170 ft
- KMMV — Mc Minnville Municipal
Mc Minnville · elev 163 ft
- KUAO — Aurora State
Aurora · elev 200 ft
- KHIO — Portland-Hillsboro
Portland · elev 208 ft
- 4S4 — Skyport
Cornelius · elev 174 ft
- 7S9 — Lenhardt Airpark
Hubbard · elev 165 ft
- 4S9 — Mulino State
Portland-Mulino · elev 260 ft
Frequently asked questions
How high does density altitude get at 17S in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Chehalem Airpark reaches roughly 1,806 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 17S on an average day?
It swings with the seasons: from roughly −998 ft at the coldest month's average temperature to about 883 ft at the warmest month's — all from a constant field elevation of 190 ft. The month-by-month table above carries the full year.
What is the field elevation of Chehalem Airpark?
190 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 17S (FAA), in Newberg, Oregon.