Summit, Alaska · field elev 2,409 ft
Density Altitude at Summit (PAST)
Summit sits at 2,409 ft, and even a typical July afternoon (66 °F) only lifts density altitude to about 3,423 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 | 0.7 | −1,058 ft | 9.9 | −379 ft |
| February | 7.7 | −540 ft | 19.0 | 277 ft |
| March | 11.7 | −248 ft | 25.4 | 729 ft |
| April | 27.7 | 890 ft | 39.5 | 1,700 ft |
| May | 41.5 | 1,835 ft | 54.0 | 2,663 ft |
| June | 52.0 | 2,532 ft | 65.0 | 3,372 ft |
| July | 55.2 | 2,741 ft | 65.8 | 3,423 ft |
| August | 50.7 | 2,447 ft | 60.6 | 3,091 ft |
| September | 40.7 | 1,781 ft | 50.3 | 2,420 ft |
| October | 25.1 | 708 ft | 33.7 | 1,304 ft |
| November | 9.2 | −430 ft | 18.4 | 234 ft |
| December | 3.9 | −820 ft | 13.4 | −125 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 PAST
DENSITY ALTITUDE
Field elevation 2,409 ft — the air behaves like 3,435 ft.
- PRESSURE ALT
- 2,410 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
- PATW — Cantwell
Cantwell · elev 2,190 ft
- PAIN — Mc Kinley Ntl Park
Mckinley Park · elev 1,720 ft
- PAHV — Healy River
Healy · elev 1,275 ft
- Z90 — Stampede
Kantishna · elev 1,852 ft
- 2Z3 — Eva Creek
Eva Creek · elev 2,817 ft
- 9AK — Totatlanika River
Totatlanika River · elev 2,717 ft
- PAAH — Kantishna
Kantishna · elev 1,578 ft
- 2AN — Tischner Air
Anderson · elev 647 ft
Frequently asked questions
How high does density altitude get at PAST in summer?
On a typical July afternoon — around 66 °F at the nearest NOAA normals station — density altitude at Summit reaches roughly 3,423 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 PAST on an average day?
It swings with the seasons: from roughly −1,058 ft at the coldest month's average temperature to about 2,741 ft at the warmest month's — all from a constant field elevation of 2,409 ft. The month-by-month table above carries the full year.
What is the field elevation of Summit?
2,409 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PAST (ICAO) / UMM (FAA), in Summit, Alaska.