Republic, Washington · field elev 2,522 ft
Density Altitude at Ferry County (R49)
Ferry County sits at 2,522 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 4,697 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 | 23.6 | 744 ft | 31.1 | 1,266 ft |
| February | 27.9 | 1,045 ft | 38.2 | 1,752 ft |
| March | 36.3 | 1,623 ft | 48.6 | 2,448 ft |
| April | 43.8 | 2,129 ft | 58.2 | 3,075 ft |
| May | 52.5 | 2,704 ft | 67.9 | 3,694 ft |
| June | 58.1 | 3,068 ft | 73.9 | 4,070 ft |
| July | 65.3 | 3,530 ft | 84.1 | 4,697 ft |
| August | 64.6 | 3,485 ft | 84.0 | 4,691 ft |
| September | 56.0 | 2,933 ft | 74.1 | 4,083 ft |
| October | 43.2 | 2,089 ft | 56.9 | 2,991 ft |
| November | 31.5 | 1,294 ft | 39.7 | 1,853 ft |
| December | 23.1 | 709 ft | 30.2 | 1,204 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 R49
DENSITY ALTITUDE
Field elevation 2,522 ft — the air behaves like 4,691 ft.
- PRESSURE ALT
- 2,524 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- WATER · GRAINS/LB
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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
- 69S — Avey Field
Laurier · elev 1,655 ft
- W01 — Tonasket Municipal
Tonasket · elev 1,311 ft
- 63S — Colville Municipal
Colville · elev 1,883 ft
- 0S7 — Dorothy Scott International
Oroville · elev 1,069 ft
- KOMK — Omak
Omak · elev 1,305 ft
- S35 — Okanogan Legion
Okanogan · elev 1,042 ft
- 1S9 — Chewelah Municipal
Chewelah · elev 2,084 ft
- S23 — Ione Municipal
Ione · elev 2,110 ft
Frequently asked questions
How high does density altitude get at R49 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Ferry County reaches roughly 4,697 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 R49 on an average day?
It swings with the seasons: from roughly 709 ft at the coldest month's average temperature to about 3,530 ft at the warmest month's — all from a constant field elevation of 2,522 ft. The month-by-month table above carries the full year.
What is the field elevation of Ferry County?
2,522 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is R49 (FAA), in Republic, Washington.