Chefornak, Alaska · field elev 54 ft
Density Altitude at Chefornak (PACK)
Chefornak sits at 54 ft, and even a typical July afternoon (64 °F) only lifts density altitude to about 386 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 | 6.9 | −3,575 ft | 12.7 | −3,143 ft |
| February | 13.3 | −3,099 ft | 20.1 | −2,601 ft |
| March | 14.5 | −3,010 ft | 22.0 | −2,464 ft |
| April | 29.0 | −1,964 ft | 36.9 | −1,409 ft |
| May | 43.0 | −989 ft | 52.0 | −380 ft |
| June | 53.3 | −293 ft | 62.1 | 288 ft |
| July | 56.3 | −93 ft | 63.6 | 386 ft |
| August | 53.9 | −253 ft | 60.5 | 183 ft |
| September | 46.1 | −778 ft | 52.7 | −333 ft |
| October | 32.2 | −1,738 ft | 37.9 | −1,340 ft |
| November | 18.5 | −2,718 ft | 24.3 | −2,299 ft |
| December | 10.0 | −3,343 ft | 16.3 | −2,878 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 PACK
DENSITY ALTITUDE
Field elevation 54 ft — the air behaves like 412 ft.
- PRESSURE ALT
- 55 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
- PAKI — Kipnuk
Kipnuk · elev 20 ft
- PAGT — Nightmute
Nightmute · elev 7 ft
- PAOO — Toksook Bay
Toksook Bay · elev 71 ft
- PAGG — Kwigillingok
Kwigillingok · elev 21 ft
- POKA — Tununak
Tununak · elev 62 ft
- PAEW — Mertarvik
Mertarvik · elev 345 ft
- PADY — Kongiganak
Kongiganak · elev 40 ft
- PAAJ — Tuntutuliak
Tuntutuliak · elev 16 ft
Frequently asked questions
How high does density altitude get at PACK in summer?
On a typical July afternoon — around 64 °F at the nearest NOAA normals station — density altitude at Chefornak reaches roughly 386 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 PACK on an average day?
It swings with the seasons: from roughly −3,575 ft at the coldest month's average temperature to about −93 ft at the warmest month's — all from a constant field elevation of 54 ft. The month-by-month table above carries the full year.
What is the field elevation of Chefornak?
54 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PACK (ICAO) / CFK (FAA), in Chefornak, Alaska.