Bear Lake, Alaska · field elev 130 ft
Density Altitude at Johnsons Landing (Z52)
Johnsons Landing sits at 130 ft, and even its warmest typical afternoon (August, 57 °F) leaves density altitude around 47 ft — below the field elevation itself. Cold, dense air is the norm here; watch for the opposite altimetry problem on cold days instead.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 30.9 | −1,734 ft | 35.2 | −1,433 ft |
| February | 31.4 | −1,699 ft | 34.9 | −1,454 ft |
| March | 30.8 | −1,741 ft | 34.7 | −1,468 ft |
| April | 35.3 | −1,426 ft | 39.5 | −1,135 ft |
| May | 40.9 | −1,038 ft | 45.5 | −724 ft |
| June | 47.2 | −609 ft | 51.9 | −292 ft |
| July | 51.4 | −326 ft | 56.1 | −13 ft |
| August | 52.5 | −252 ft | 57.0 | 47 ft |
| September | 48.7 | −507 ft | 53.4 | −192 ft |
| October | 41.2 | −1,018 ft | 45.5 | −724 ft |
| November | 36.4 | −1,349 ft | 40.1 | −1,093 ft |
| December | 32.7 | −1,608 ft | 36.5 | −1,342 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 Z52
DENSITY ALTITUDE
Field elevation 130 ft — the air behaves like 47 ft.
- PRESSURE ALT
- 131 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
- PAOU — Nelson Lagoon
Nelson Lagoon · elev 14 ft
- PAPE — Perryville
Perryville · elev 30 ft
- PASD — Sand Point
Sand Point · elev 24 ft
- A79 — Chignik Lake
Chignik Lake · elev 50 ft
- KCL — Chignik Lagoon
Chignik Lagoon · elev 28 ft
- PAJC — Chignik
Chignik · elev 18 ft
- PAPH — Port Heiden
Port Heiden · elev 95 ft
- PAVC — King Cove
King Cove · elev 149 ft
Frequently asked questions
How high does density altitude get at Z52 in summer?
On a typical August afternoon — around 57 °F at the nearest NOAA normals station — density altitude at Johnsons Landing reaches roughly 47 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 Z52 on an average day?
It swings with the seasons: from roughly −1,741 ft at the coldest month's average temperature to about −252 ft at the warmest month's — all from a constant field elevation of 130 ft. The month-by-month table above carries the full year.
What is the field elevation of Johnsons Landing?
130 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is Z52 (FAA), in Bear Lake, Alaska.