Packwood, Washington · field elev 1,057 ft
Density Altitude at Packwood (55S)
Packwood sits at 1,057 ft, and even a typical August afternoon (80 °F) only lifts density altitude to about 2,629 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 | 37.4 | −125 ft | 43.8 | 312 ft |
| February | 40.0 | 54 ft | 48.6 | 635 ft |
| March | 43.5 | 292 ft | 53.0 | 928 ft |
| April | 48.3 | 615 ft | 58.9 | 1,316 ft |
| May | 55.1 | 1,067 ft | 66.7 | 1,820 ft |
| June | 59.8 | 1,375 ft | 71.0 | 2,095 ft |
| July | 65.9 | 1,769 ft | 79.1 | 2,604 ft |
| August | 65.8 | 1,763 ft | 79.5 | 2,629 ft |
| September | 60.3 | 1,407 ft | 74.0 | 2,284 ft |
| October | 50.6 | 769 ft | 61.0 | 1,453 ft |
| November | 42.1 | 197 ft | 49.3 | 682 ft |
| December | 36.8 | −166 ft | 42.6 | 231 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 55S
DENSITY ALTITUDE
Field elevation 1,057 ft — the air behaves like 2,660 ft.
- PRESSURE ALT
- 1,058 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
- 4S6 — Tieton State
Rimrock · elev 2,964 ft
- 39P — Strom Field
Morton · elev 941 ft
- 21W — Ranger Creek
Greenwater · elev 2,650 ft
- 2W3 — Swanson Field
Eatonville · elev 843 ft
- KPLU — Pierce County/Thun Field
Puyallup · elev 538 ft
- 3B8 — Shady Acres
Spanaway · elev 445 ft
- KESW — Easton State
Easton · elev 2,226 ft
- KYKM — Yakima Air Trml/Mcallister Field
Yakima · elev 1,099 ft
Frequently asked questions
How high does density altitude get at 55S in summer?
On a typical August afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Packwood reaches roughly 2,629 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 55S on an average day?
It swings with the seasons: from roughly −166 ft at the coldest month's average temperature to about 1,769 ft at the warmest month's — all from a constant field elevation of 1,057 ft. The month-by-month table above carries the full year.
What is the field elevation of Packwood?
1,057 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 55S (FAA), in Packwood, Washington.