Chelan, Washington · field elev 1,263 ft
Density Altitude at Lake Chelan (S10)
Lake Chelan sits at 1,263 ft, and even a typical August afternoon (87 °F) only lifts density altitude to about 3,342 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 | −521 ft | 34.3 | −82 ft |
| February | 33.0 | −172 ft | 41.7 | 426 ft |
| March | 41.1 | 385 ft | 51.9 | 1,110 ft |
| April | 49.8 | 970 ft | 62.1 | 1,778 ft |
| May | 59.0 | 1,576 ft | 71.9 | 2,404 ft |
| June | 65.4 | 1,990 ft | 77.9 | 2,781 ft |
| July | 72.8 | 2,461 ft | 86.6 | 3,318 ft |
| August | 72.5 | 2,442 ft | 87.0 | 3,342 ft |
| September | 63.2 | 1,849 ft | 77.2 | 2,737 ft |
| October | 50.5 | 1,017 ft | 62.2 | 1,784 ft |
| November | 37.6 | 146 ft | 45.7 | 696 ft |
| December | 28.7 | −472 ft | 34.9 | −40 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 S10
DENSITY ALTITUDE
Field elevation 1,263 ft — the air behaves like 3,342 ft.
- PRESSURE ALT
- 1,264 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
- 8W3 — Mansfield
Mansfield · elev 2,272 ft
- 2S5 — Waterville
Waterville · elev 2,645 ft
- S97 — Anderson Field
Brewster · elev 920 ft
- 2S0 — Twisp Municipal
Twisp · elev 1,602 ft
- KEAT — Pangborn Meml
Wenatchee · elev 1,249 ft
- 8S2 — Cashmere-Dryden
Cashmere · elev 858 ft
- 27W — Lake Wenatchee State
Leavenworth · elev 1,939 ft
- S35 — Okanogan Legion
Okanogan · elev 1,042 ft
Frequently asked questions
How high does density altitude get at S10 in summer?
On a typical August afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Lake Chelan reaches roughly 3,342 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 S10 on an average day?
It swings with the seasons: from roughly −521 ft at the coldest month's average temperature to about 2,461 ft at the warmest month's — all from a constant field elevation of 1,263 ft. The month-by-month table above carries the full year.
What is the field elevation of Lake Chelan?
1,263 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S10 (FAA), in Chelan, Washington.