Middleton Island, Alaska · field elev 100 ft
Density Altitude at Middleton Island (PAMD)
Middleton Island sits at 100 ft, and even a typical July afternoon (63 °F) only lifts density altitude to about 371 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 | 29.9 | −1,842 ft | 34.1 | −1,547 ft |
| February | 30.5 | −1,800 ft | 34.7 | −1,505 ft |
| March | 31.2 | −1,751 ft | 36.0 | −1,415 ft |
| April | 37.1 | −1,338 ft | 42.5 | −966 ft |
| May | 44.5 | −829 ft | 51.7 | −343 ft |
| June | 51.8 | −336 ft | 59.2 | 155 ft |
| July | 56.1 | −50 ft | 62.5 | 371 ft |
| August | 55.2 | −109 ft | 61.1 | 280 ft |
| September | 48.7 | −544 ft | 53.9 | −196 ft |
| October | 40.7 | −1,089 ft | 45.3 | −775 ft |
| November | 34.0 | −1,554 ft | 38.0 | −1,276 ft |
| December | 31.5 | −1,729 ft | 35.6 | −1,442 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 PAMD
DENSITY ALTITUDE
Field elevation 100 ft — the air behaves like 404 ft.
- PRESSURE ALT
- 101 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
- PFCB — Chenega Bay
Chenega · elev 69 ft
- PACV — Merle K (Mudhole) Smith
Cordova · elev 53 ft
- CKU — Cordova Municipal
Cordova · elev 59 ft
- PAKA — Tatitlek
Tatitlek · elev 62 ft
- PAVD — Valdez Pioneer Field
Valdez · elev 128 ft
- PAWD — Seward
Seward · elev 28 ft
- K55 — Thompson Pass
Valdez · elev 2,080 ft
- PAWR — Whittier
Whittier · elev 39 ft
Frequently asked questions
How high does density altitude get at PAMD in summer?
On a typical July afternoon — around 63 °F at the nearest NOAA normals station — density altitude at Middleton Island reaches roughly 371 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 PAMD on an average day?
It swings with the seasons: from roughly −1,842 ft at the coldest month's average temperature to about −50 ft at the warmest month's — all from a constant field elevation of 100 ft. The month-by-month table above carries the full year.
What is the field elevation of Middleton Island?
100 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PAMD (ICAO) / MDO (FAA), in Middleton Island, Alaska.