Chewelah, Washington · field elev 2,084 ft
Density Altitude at Chewelah Municipal (1S9)
Chewelah Municipal sits at 2,084 ft, and even a typical August afternoon (86 °F) only lifts density altitude to about 4,298 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 | 26.6 | 407 ft | 32.9 | 845 ft |
| February | 30.5 | 679 ft | 39.8 | 1,316 ft |
| March | 38.5 | 1,228 ft | 50.1 | 2,006 ft |
| April | 46.5 | 1,767 ft | 60.2 | 2,665 ft |
| May | 55.2 | 2,341 ft | 70.0 | 3,290 ft |
| June | 60.6 | 2,691 ft | 75.7 | 3,647 ft |
| July | 67.5 | 3,132 ft | 86.1 | 4,286 ft |
| August | 66.5 | 3,069 ft | 86.3 | 4,298 ft |
| September | 57.5 | 2,490 ft | 76.0 | 3,666 ft |
| October | 45.0 | 1,667 ft | 59.3 | 2,607 ft |
| November | 34.1 | 927 ft | 42.1 | 1,472 ft |
| December | 26.8 | 421 ft | 33.0 | 852 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 1S9
DENSITY ALTITUDE
Field elevation 2,084 ft — the air behaves like 4,280 ft.
- PRESSURE ALT
- 2,085 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
- 63S — Colville Municipal
Colville · elev 1,883 ft
- KDEW — Deer Park
Deer Park · elev 2,211 ft
- S23 — Ione Municipal
Ione · elev 2,110 ft
- 70S — Mead Flying Service
Mead · elev 1,905 ft
- 09S — Sullivan Lake State
Metaline Falls · elev 2,614 ft
- KSFF — Felts Field
Spokane · elev 1,957 ft
- KGEG — Spokane International
Spokane · elev 2,385 ft
- 68S — Davenport
Davenport · elev 2,424 ft
Frequently asked questions
How high does density altitude get at 1S9 in summer?
On a typical August afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Chewelah Municipal reaches roughly 4,298 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 1S9 on an average day?
It swings with the seasons: from roughly 407 ft at the coldest month's average temperature to about 3,132 ft at the warmest month's — all from a constant field elevation of 2,084 ft. The month-by-month table above carries the full year.
What is the field elevation of Chewelah Municipal?
2,084 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1S9 (FAA), in Chewelah, Washington.