Yakutat, Alaska · field elev 39 ft
Density Altitude at East Alsek River (AK76)
East Alsek River sits at 39 ft, and even a typical August afternoon (62 °F) only lifts density altitude to about 250 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 | 28.6 | −2,011 ft | 34.8 | −1,574 ft |
| February | 30.6 | −1,869 ft | 37.8 | −1,366 ft |
| March | 31.9 | −1,778 ft | 40.0 | −1,214 ft |
| April | 38.6 | −1,310 ft | 46.9 | −742 ft |
| May | 45.6 | −830 ft | 53.7 | −285 ft |
| June | 51.9 | −405 ft | 58.8 | 53 ft |
| July | 55.4 | −172 ft | 61.6 | 237 ft |
| August | 54.7 | −218 ft | 61.8 | 250 ft |
| September | 49.4 | −573 ft | 56.9 | −72 ft |
| October | 41.9 | −1,083 ft | 48.9 | −607 ft |
| November | 33.7 | −1,651 ft | 40.1 | −1,207 ft |
| December | 30.8 | −1,855 ft | 36.4 | −1,463 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 AK76
DENSITY ALTITUDE
Field elevation 39 ft — the air behaves like 263 ft.
- PRESSURE ALT
- 40 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 Alaska fields
- 3AK — Dry Bay
Yakutat · elev 33 ft
- A57 — Alsek River
Yakutat · elev 53 ft
- A69 — Tanis Mesa
Yakutat · elev 183 ft
- A67 — Harlequin Lake
Yakutat · elev 113 ft
- A68 — Situk
Yakutat · elev 60 ft
- PAYA — Yakutat
Yakutat · elev 40 ft
- PAHN — Haines
Haines · elev 29 ft
- PAGS — Gustavus
Gustavus · elev 36 ft
Frequently asked questions
How high does density altitude get at AK76 in summer?
On a typical August afternoon — around 62 °F at the nearest NOAA normals station — density altitude at East Alsek River reaches roughly 250 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 AK76 on an average day?
It swings with the seasons: from roughly −2,011 ft at the coldest month's average temperature to about −172 ft at the warmest month's — all from a constant field elevation of 39 ft. The month-by-month table above carries the full year.
What is the field elevation of East Alsek River?
39 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is AK76 (FAA), in Yakutat, Alaska.