Okanogan, Washington · field elev 1,042 ft
Density Altitude at Okanogan Legion (S35)
Okanogan Legion sits at 1,042 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 3,219 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 | 28.0 | −798 ft | 32.8 | −462 ft |
| February | 32.5 | −482 ft | 39.8 | 21 ft |
| March | 41.8 | 158 ft | 52.5 | 876 ft |
| April | 49.8 | 697 ft | 62.8 | 1,551 ft |
| May | 58.8 | 1,291 ft | 72.4 | 2,165 ft |
| June | 65.1 | 1,699 ft | 79.1 | 2,585 ft |
| July | 73.7 | 2,247 ft | 89.4 | 3,219 ft |
| August | 72.8 | 2,190 ft | 88.8 | 3,183 ft |
| September | 63.3 | 1,583 ft | 78.2 | 2,529 ft |
| October | 49.1 | 650 ft | 60.7 | 1,415 ft |
| November | 35.9 | −247 ft | 43.0 | 239 ft |
| December | 27.9 | −805 ft | 32.5 | −482 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 S35
DENSITY ALTITUDE
Field elevation 1,042 ft — the air behaves like 3,195 ft.
- PRESSURE ALT
- 1,043 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
- KOMK — Omak
Omak · elev 1,305 ft
- S97 — Anderson Field
Brewster · elev 920 ft
- 2S0 — Twisp Municipal
Twisp · elev 1,602 ft
- W01 — Tonasket Municipal
Tonasket · elev 1,311 ft
- S52 — Methow Valley State
Winthrop · elev 1,706 ft
- 3W7 — Grand Coulee Dam
Electric City · elev 1,593 ft
- 8W3 — Mansfield
Mansfield · elev 2,272 ft
- S10 — Lake Chelan
Chelan · elev 1,263 ft
Frequently asked questions
How high does density altitude get at S35 in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Okanogan Legion reaches roughly 3,219 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 S35 on an average day?
It swings with the seasons: from roughly −805 ft at the coldest month's average temperature to about 2,247 ft at the warmest month's — all from a constant field elevation of 1,042 ft. The month-by-month table above carries the full year.
What is the field elevation of Okanogan Legion?
1,042 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S35 (FAA), in Okanogan, Washington.