Olympia, Washington · field elev 208 ft
Density Altitude at Olympia Regional (KOLM)
Olympia Regional sits at 208 ft, and even a typical August afternoon (78 °F) only lifts density altitude to about 1,497 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 | 39.6 | −1,031 ft | 46.0 | −593 ft |
| February | 40.7 | −955 ft | 49.1 | −384 ft |
| March | 44.1 | −722 ft | 53.7 | −76 ft |
| April | 48.2 | −444 ft | 58.9 | 268 ft |
| May | 54.5 | −22 ft | 66.1 | 738 ft |
| June | 59.1 | 282 ft | 70.8 | 1,040 ft |
| July | 64.2 | 615 ft | 77.6 | 1,471 ft |
| August | 64.2 | 615 ft | 78.0 | 1,497 ft |
| September | 59.1 | 282 ft | 72.1 | 1,123 ft |
| October | 50.3 | −303 ft | 60.2 | 354 ft |
| November | 43.2 | −784 ft | 50.6 | −283 ft |
| December | 38.9 | −1,079 ft | 44.9 | −668 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 KOLM
DENSITY ALTITUDE
Field elevation 208 ft — the air behaves like 1,497 ft.
- PRESSURE ALT
- 209 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
- 44T — Hoskins Field
Olympia · elev 213 ft
- 8W9 — R & K Skyranch
Rochester · elev 149 ft
- KCLS — Chehalis-Centralia
Chehalis · elev 177 ft
- KSHN — Sanderson Field
Shelton · elev 273 ft
- KTIW — Tacoma Narrows
Tacoma · elev 295 ft
- 3B8 — Shady Acres
Spanaway · elev 445 ft
- KPLU — Pierce County/Thun Field
Puyallup · elev 538 ft
- 2W3 — Swanson Field
Eatonville · elev 843 ft
Frequently asked questions
How high does density altitude get at KOLM in summer?
On a typical August afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Olympia Regional reaches roughly 1,497 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 KOLM on an average day?
It swings with the seasons: from roughly −1,079 ft at the coldest month's average temperature to about 615 ft at the warmest month's — all from a constant field elevation of 208 ft. The month-by-month table above carries the full year.
What is the field elevation of Olympia Regional?
208 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KOLM (ICAO) / OLM (FAA), in Olympia, Washington.