Yakutat, Alaska · field elev 113 ft
Density Altitude at Harlequin Lake (A67)
Harlequin Lake sits at 113 ft, and even a typical August afternoon (62 °F) only lifts density altitude to about 341 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 | −1,918 ft | 34.8 | −1,482 ft |
| February | 30.6 | −1,777 ft | 37.8 | −1,273 ft |
| March | 31.9 | −1,685 ft | 40.0 | −1,121 ft |
| April | 38.6 | −1,218 ft | 46.9 | −650 ft |
| May | 45.6 | −738 ft | 53.7 | −193 ft |
| June | 51.9 | −313 ft | 58.8 | 145 ft |
| July | 55.4 | −80 ft | 61.6 | 328 ft |
| August | 54.7 | −127 ft | 61.8 | 341 ft |
| September | 49.4 | −481 ft | 56.9 | 19 ft |
| October | 41.9 | −991 ft | 48.9 | −515 ft |
| November | 33.7 | −1,559 ft | 40.1 | −1,114 ft |
| December | 30.8 | −1,763 ft | 36.4 | −1,371 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 A67
DENSITY ALTITUDE
Field elevation 113 ft — the air behaves like 354 ft.
- PRESSURE ALT
- 114 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
- A68 — Situk
Yakutat · elev 60 ft
- A69 — Tanis Mesa
Yakutat · elev 183 ft
- PAYA — Yakutat
Yakutat · elev 40 ft
- A57 — Alsek River
Yakutat · elev 53 ft
- 3AK — Dry Bay
Yakutat · elev 33 ft
- AK76 — East Alsek River
Yakutat · elev 39 ft
- PAHN — Haines
Haines · elev 29 ft
- PAGY — Skagway
Skagway · elev 44 ft
Frequently asked questions
How high does density altitude get at A67 in summer?
On a typical August afternoon — around 62 °F at the nearest NOAA normals station — density altitude at Harlequin Lake reaches roughly 341 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 A67 on an average day?
It swings with the seasons: from roughly −1,918 ft at the coldest month's average temperature to about −80 ft at the warmest month's — all from a constant field elevation of 113 ft. The month-by-month table above carries the full year.
What is the field elevation of Harlequin Lake?
113 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is A67 (FAA), in Yakutat, Alaska.