Spokane, Washington · field elev 1,957 ft
Density Altitude at Felts Field (KSFF)
Felts Field sits at 1,957 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 4,193 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 | 31.8 | 610 ft | 37.8 | 1,023 ft |
| February | 34.6 | 804 ft | 42.5 | 1,341 ft |
| March | 41.5 | 1,274 ft | 51.3 | 1,928 ft |
| April | 48.1 | 1,716 ft | 59.6 | 2,470 ft |
| May | 56.9 | 2,295 ft | 69.7 | 3,116 ft |
| June | 63.1 | 2,696 ft | 75.8 | 3,498 ft |
| July | 71.5 | 3,229 ft | 87.1 | 4,193 ft |
| August | 70.4 | 3,160 ft | 86.2 | 4,138 ft |
| September | 61.4 | 2,586 ft | 76.0 | 3,510 ft |
| October | 49.1 | 1,782 ft | 60.3 | 2,515 ft |
| November | 37.9 | 1,029 ft | 45.1 | 1,516 ft |
| December | 31.3 | 576 ft | 36.9 | 961 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 KSFF
DENSITY ALTITUDE
Field elevation 1,957 ft — the air behaves like 4,186 ft.
- PRESSURE ALT
- 1,958 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
- 70S — Mead Flying Service
Mead · elev 1,905 ft
- KGEG — Spokane International
Spokane · elev 2,385 ft
- KDEW — Deer Park
Deer Park · elev 2,211 ft
- 72S — Rosalia Municipal
Rosalia · elev 2,170 ft
- 73S — Willard Field
Tekoa · elev 2,520 ft
- 68S — Davenport
Davenport · elev 2,424 ft
- 1S9 — Chewelah Municipal
Chewelah · elev 2,084 ft
- S94 — Port Of Whitman Business Air Center
Colfax · elev 2,181 ft
Frequently asked questions
How high does density altitude get at KSFF in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Felts Field reaches roughly 4,193 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 KSFF on an average day?
It swings with the seasons: from roughly 576 ft at the coldest month's average temperature to about 3,229 ft at the warmest month's — all from a constant field elevation of 1,957 ft. The month-by-month table above carries the full year.
What is the field elevation of Felts Field?
1,957 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSFF (ICAO) / SFF (FAA), in Spokane, Washington.