Tekoa, Washington · field elev 2,520 ft
Density Altitude at Willard Field (73S)
Willard Field sits at 2,520 ft, and even a typical August afternoon (83 °F) only lifts density altitude to about 4,628 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 | 30.2 | 1,202 ft | 36.6 | 1,641 ft |
| February | 32.3 | 1,346 ft | 39.8 | 1,858 ft |
| March | 38.0 | 1,736 ft | 46.6 | 2,313 ft |
| April | 44.5 | 2,173 ft | 55.3 | 2,885 ft |
| May | 52.6 | 2,708 ft | 64.7 | 3,489 ft |
| June | 57.1 | 3,001 ft | 69.7 | 3,805 ft |
| July | 66.5 | 3,603 ft | 81.4 | 4,530 ft |
| August | 66.7 | 3,616 ft | 83.0 | 4,628 ft |
| September | 58.4 | 3,085 ft | 72.6 | 3,987 ft |
| October | 46.5 | 2,306 ft | 57.4 | 3,021 ft |
| November | 36.3 | 1,620 ft | 43.1 | 2,080 ft |
| December | 28.7 | 1,098 ft | 34.6 | 1,504 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 73S
DENSITY ALTITUDE
Field elevation 2,520 ft — the air behaves like 4,628 ft.
- PRESSURE ALT
- 2,522 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
- 72S — Rosalia Municipal
Rosalia · elev 2,170 ft
- S94 — Port Of Whitman Business Air Center
Colfax · elev 2,181 ft
- KSFF — Felts Field
Spokane · elev 1,957 ft
- KPUW — Pullman/Moscow Regional
Pullman/Moscow · elev 2,567 ft
- KGEG — Spokane International
Spokane · elev 2,385 ft
- 70S — Mead Flying Service
Mead · elev 1,905 ft
- 00W — Lower Granite State
Colfax · elev 719 ft
- KDEW — Deer Park
Deer Park · elev 2,211 ft
Frequently asked questions
How high does density altitude get at 73S in summer?
On a typical August afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Willard Field reaches roughly 4,628 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 73S on an average day?
It swings with the seasons: from roughly 1,098 ft at the coldest month's average temperature to about 3,616 ft at the warmest month's — all from a constant field elevation of 2,520 ft. The month-by-month table above carries the full year.
What is the field elevation of Willard Field?
2,520 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 73S (FAA), in Tekoa, Washington.