Hoquiam, Washington · field elev 18 ft
Density Altitude at Bowerman Field (KHQM)
Bowerman Field sits at 18 ft, and even a typical August afternoon (68 °F) only lifts density altitude to about 633 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 | 42.8 | −1,047 ft | 47.5 | −727 ft |
| February | 43.6 | −993 ft | 49.6 | −586 ft |
| March | 45.8 | −843 ft | 52.2 | −411 ft |
| April | 48.7 | −646 ft | 55.6 | −184 ft |
| May | 53.4 | −331 ft | 60.1 | 113 ft |
| June | 57.1 | −85 ft | 63.4 | 329 ft |
| July | 60.3 | 126 ft | 67.0 | 562 ft |
| August | 61.0 | 172 ft | 68.1 | 633 ft |
| September | 59.1 | 47 ft | 67.0 | 562 ft |
| October | 52.5 | −391 ft | 59.5 | 73 ft |
| November | 45.9 | −836 ft | 51.6 | −451 ft |
| December | 42.0 | −1,102 ft | 46.7 | −782 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 KHQM
DENSITY ALTITUDE
Field elevation 18 ft — the air behaves like 627 ft.
- PRESSURE ALT
- 19 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
- 14S — Westport
Westport · elev 14 ft
- W04 — Ocean Shores Municipal
Ocean Shores · elev 15 ft
- S16 — Copalis State
Copalis · elev 1 ft
- 2S9 — Willapa Harbor
South Bend/Raymond/ · elev 13 ft
- 8W9 — R & K Skyranch
Rochester · elev 149 ft
- KSHN — Sanderson Field
Shelton · elev 273 ft
- 7W1 — Port Of Ilwaco
Ilwaco · elev 13 ft
- KOLM — Olympia Regional
Olympia · elev 208 ft
Frequently asked questions
How high does density altitude get at KHQM in summer?
On a typical August afternoon — around 68 °F at the nearest NOAA normals station — density altitude at Bowerman Field reaches roughly 633 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 KHQM on an average day?
It swings with the seasons: from roughly −1,102 ft at the coldest month's average temperature to about 172 ft at the warmest month's — all from a constant field elevation of 18 ft. The month-by-month table above carries the full year.
What is the field elevation of Bowerman Field?
18 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHQM (ICAO) / HQM (FAA), in Hoquiam, Washington.