Feather River, Alaska · field elev 325 ft
Density Altitude at Feather River (3Z1)
Feather River sits at 325 ft, and even a typical July afternoon (58 °F) only lifts density altitude to about 334 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 | 5.6 | −3,329 ft | 13.2 | −2,764 ft |
| February | 9.0 | −3,075 ft | 16.8 | −2,500 ft |
| March | 9.6 | −3,030 ft | 17.6 | −2,442 ft |
| April | 22.7 | −2,073 ft | 29.4 | −1,596 ft |
| May | 37.3 | −1,044 ft | 43.6 | −611 ft |
| June | 48.3 | −292 ft | 55.1 | 162 ft |
| July | 52.0 | −44 ft | 57.7 | 334 ft |
| August | 50.2 | −165 ft | 56.0 | 222 ft |
| September | 43.1 | −645 ft | 49.0 | −245 ft |
| October | 30.4 | −1,525 ft | 36.0 | −1,134 ft |
| November | 18.2 | −2,398 ft | 24.3 | −1,958 ft |
| December | 9.1 | −3,067 ft | 16.2 | −2,544 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 3Z1
DENSITY ALTITUDE
Field elevation 325 ft — the air behaves like 354 ft.
- PRESSURE ALT
- 326 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
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- PAOM — Nome
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- 94Z — Nome City Field
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- Z81 — Salmon Lake
Salmon Lake · elev 509 ft
- PFKT — Brevig Mission
Brevig Mission · elev 38 ft
- 5QC — Quartz Creek / Kougarok
Quartz Creek · elev 416 ft
- K29 — Council
Council · elev 100 ft
Frequently asked questions
How high does density altitude get at 3Z1 in summer?
On a typical July afternoon — around 58 °F at the nearest NOAA normals station — density altitude at Feather River reaches roughly 334 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 3Z1 on an average day?
It swings with the seasons: from roughly −3,329 ft at the coldest month's average temperature to about −44 ft at the warmest month's — all from a constant field elevation of 325 ft. The month-by-month table above carries the full year.
What is the field elevation of Feather River?
325 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3Z1 (FAA), in Feather River, Alaska.