Tetlin, Alaska · field elev 1,671 ft
Density Altitude at Tetlin (3T4)
Tetlin sits at 1,671 ft, and even a typical July afternoon (73 °F) only lifts density altitude to about 2,948 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 | −2,980 ft | −5.0 | −2,425 ft |
| February | −1.6 | −2,166 ft | 8.6 | −1,405 ft |
| March | 10.3 | −1,280 ft | 25.1 | −215 ft |
| April | 31.6 | 240 ft | 45.6 | 1,195 ft |
| May | 46.4 | 1,249 ft | 61.1 | 2,215 ft |
| June | 56.6 | 1,923 ft | 70.6 | 2,822 ft |
| July | 59.3 | 2,099 ft | 72.6 | 2,948 ft |
| August | 53.4 | 1,713 ft | 66.1 | 2,536 ft |
| September | 42.8 | 1,007 ft | 54.7 | 1,799 ft |
| October | 23.8 | −307 ft | 32.3 | 288 ft |
| November | 0.4 | −2,015 ft | 8.4 | −1,419 ft |
| December | −10.3 | −2,833 ft | −2.6 | −2,242 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 3T4
DENSITY ALTITUDE
Field elevation 1,671 ft — the air behaves like 2,973 ft.
- PRESSURE ALT
- 1,672 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
- PFTO — Tok Junction
Tok · elev 1,643 ft
- PAOR — Northway
Northway · elev 1,720 ft
- TSG — Tanacross
Tanacross · elev 1,559 ft
- PAAY — Chicken
Chicken · elev 1,640 ft
- CZN — Chisana
Chisana · elev 3,348 ft
- CZO — Chistochina
Chistochina · elev 1,861 ft
- BYA — Boundary
Boundary · elev 2,940 ft
- 4Z5 — Horsfeld
Horsfeld · elev 3,620 ft
Frequently asked questions
How high does density altitude get at 3T4 in summer?
On a typical July afternoon — around 73 °F at the nearest NOAA normals station — density altitude at Tetlin reaches roughly 2,948 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 3T4 on an average day?
It swings with the seasons: from roughly −2,980 ft at the coldest month's average temperature to about 2,099 ft at the warmest month's — all from a constant field elevation of 1,671 ft. The month-by-month table above carries the full year.
What is the field elevation of Tetlin?
1,671 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3T4 (FAA), in Tetlin, Alaska.