Tok, Alaska · field elev 1,643 ft
Density Altitude at Tok Junction (PFTO)
Tok Junction sits at 1,643 ft, and even a typical July afternoon (73 °F) only lifts density altitude to about 2,914 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 | −12.2 | −3,016 ft | −5.0 | −2,460 ft |
| February | −1.6 | −2,202 ft | 8.6 | −1,440 ft |
| March | 10.3 | −1,315 ft | 25.1 | −250 ft |
| April | 31.6 | 205 ft | 45.6 | 1,160 ft |
| May | 46.4 | 1,214 ft | 61.1 | 2,181 ft |
| June | 56.6 | 1,888 ft | 70.6 | 2,788 ft |
| July | 59.3 | 2,064 ft | 72.6 | 2,914 ft |
| August | 53.4 | 1,679 ft | 66.1 | 2,502 ft |
| September | 42.8 | 972 ft | 54.7 | 1,764 ft |
| October | 23.8 | −342 ft | 32.3 | 254 ft |
| November | 0.4 | −2,051 ft | 8.4 | −1,455 ft |
| December | −10.3 | −2,868 ft | −2.6 | −2,278 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 PFTO
DENSITY ALTITUDE
Field elevation 1,643 ft — the air behaves like 2,939 ft.
- PRESSURE ALT
- 1,644 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
- TSG — Tanacross
Tanacross · elev 1,559 ft
- 3T4 — Tetlin
Tetlin · elev 1,671 ft
- PAOR — Northway
Northway · elev 1,720 ft
- PAAY — Chicken
Chicken · elev 1,640 ft
- CZO — Chistochina
Chistochina · elev 1,861 ft
- BYA — Boundary
Boundary · elev 2,940 ft
- PAXK — Paxson
Paxson · elev 2,653 ft
- 5BK — Black Rapids
Black Rapids · elev 2,125 ft
Frequently asked questions
How high does density altitude get at PFTO in summer?
On a typical July afternoon — around 73 °F at the nearest NOAA normals station — density altitude at Tok Junction reaches roughly 2,914 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 PFTO on an average day?
It swings with the seasons: from roughly −3,016 ft at the coldest month's average temperature to about 2,064 ft at the warmest month's — all from a constant field elevation of 1,643 ft. The month-by-month table above carries the full year.
What is the field elevation of Tok Junction?
1,643 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PFTO (ICAO) / 6K8 (FAA), in Tok, Alaska.