Unalaska, Alaska · field elev 23 ft
Density Altitude at Unalaska (PADU)
Unalaska sits at 23 ft, and even a typical August afternoon (59 °F) only lifts density altitude to about 66 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 | 33.0 | −1,720 ft | 37.3 | −1,420 ft |
| February | 34.0 | −1,650 ft | 38.6 | −1,330 ft |
| March | 34.1 | −1,643 ft | 38.9 | −1,309 ft |
| April | 37.1 | −1,434 ft | 41.8 | −1,110 ft |
| May | 42.0 | −1,096 ft | 46.7 | −775 ft |
| June | 47.3 | −735 ft | 52.3 | −398 ft |
| July | 52.0 | −418 ft | 57.4 | −59 ft |
| August | 53.7 | −305 ft | 59.3 | 66 ft |
| September | 49.4 | −593 ft | 54.6 | −245 ft |
| October | 43.2 | −1,014 ft | 48.1 | −681 ft |
| November | 38.2 | −1,358 ft | 43.3 | −1,007 ft |
| December | 35.0 | −1,580 ft | 39.3 | −1,282 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 PADU
DENSITY ALTITUDE
Field elevation 23 ft — the air behaves like 47 ft.
- PRESSURE ALT
- 24 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
- PAUT — Akutan
Akutan · elev 129 ft
- PAKO — Nikolski As
Nikolski · elev 77 ft
- PAKF — False Pass
False Pass · elev 18 ft
- PACD — Cold Bay
Cold Bay · elev 100 ft
- PAVC — King Cove
King Cove · elev 149 ft
- PAPB — St George
St George · elev 128 ft
- PAOU — Nelson Lagoon
Nelson Lagoon · elev 14 ft
- PASD — Sand Point
Sand Point · elev 24 ft
Frequently asked questions
How high does density altitude get at PADU in summer?
On a typical August afternoon — around 59 °F at the nearest NOAA normals station — density altitude at Unalaska reaches roughly 66 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 PADU on an average day?
It swings with the seasons: from roughly −1,720 ft at the coldest month's average temperature to about −305 ft at the warmest month's — all from a constant field elevation of 23 ft. The month-by-month table above carries the full year.
What is the field elevation of Unalaska?
23 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PADU (ICAO) / DUT (FAA), in Unalaska, Alaska.