Quillayute, Washington · field elev 194 ft
Density Altitude at Quillayute (KUIL)
Quillayute sits at 194 ft, and even a typical August afternoon (69 °F) only lifts density altitude to about 901 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 | 41.7 | −904 ft | 47.5 | −509 ft |
| February | 42.1 | −876 ft | 49.1 | −401 ft |
| March | 43.9 | −753 ft | 51.2 | −260 ft |
| April | 46.9 | −549 ft | 54.8 | −20 ft |
| May | 51.7 | −226 ft | 60.0 | 323 ft |
| June | 55.5 | 27 ft | 63.3 | 539 ft |
| July | 59.3 | 277 ft | 67.6 | 817 ft |
| August | 60.0 | 323 ft | 68.9 | 901 ft |
| September | 57.1 | 133 ft | 66.7 | 759 ft |
| October | 50.6 | −300 ft | 58.7 | 238 ft |
| November | 44.7 | −699 ft | 51.2 | −260 ft |
| December | 41.0 | −952 ft | 46.7 | −563 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 KUIL
DENSITY ALTITUDE
Field elevation 194 ft — the air behaves like 907 ft.
- PRESSURE ALT
- 195 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 Washington fields
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- 11S — Sekiu
Sekiu · elev 355 ft
- KCLM — William R Fairchild International
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- S16 — Copalis State
Copalis · elev 1 ft
- W28 — Sequim Valley
Sequim · elev 151 ft
- W04 — Ocean Shores Municipal
Ocean Shores · elev 15 ft
- KHQM — Bowerman Field
Hoquiam · elev 18 ft
- 14S — Westport
Westport · elev 14 ft
Frequently asked questions
How high does density altitude get at KUIL in summer?
On a typical August afternoon — around 69 °F at the nearest NOAA normals station — density altitude at Quillayute reaches roughly 901 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 KUIL on an average day?
It swings with the seasons: from roughly −952 ft at the coldest month's average temperature to about 323 ft at the warmest month's — all from a constant field elevation of 194 ft. The month-by-month table above carries the full year.
What is the field elevation of Quillayute?
194 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KUIL (ICAO) / UIL (FAA), in Quillayute, Washington.