Petersburg, Alaska · field elev 113 ft
Density Altitude at Petersburg James A Johnson (PAPG)
Petersburg James A Johnson sits at 113 ft, and even a typical July afternoon (62 °F) only lifts density altitude to about 335 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 | 30.9 | −1,755 ft | 34.6 | −1,496 ft |
| February | 32.1 | −1,671 ft | 36.7 | −1,350 ft |
| March | 34.9 | −1,475 ft | 40.3 | −1,101 ft |
| April | 41.4 | −1,025 ft | 47.8 | −589 ft |
| May | 48.5 | −542 ft | 55.3 | −87 ft |
| June | 54.0 | −173 ft | 59.9 | 217 ft |
| July | 56.3 | −20 ft | 61.7 | 335 ft |
| August | 55.8 | −54 ft | 61.2 | 302 ft |
| September | 50.8 | −387 ft | 55.7 | −60 ft |
| October | 43.3 | −895 ft | 47.4 | −616 ft |
| November | 35.8 | −1,412 ft | 39.3 | −1,170 ft |
| December | 31.8 | −1,692 ft | 35.3 | −1,447 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 PAPG
DENSITY ALTITUDE
Field elevation 113 ft — the air behaves like 354 ft.
- PRESSURE ALT
- 114 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
- PAWG — Wrangell
Wrangell · elev 44 ft
- PAFE — Kake
Kake · elev 172 ft
- PAKW — Klawock
Klawock · elev 80 ft
- PASI — Sitka Rocky Gutierrez
Sitka · elev 27 ft
- PAKT — Ketchikan International
Ketchikan · elev 92 ft
- PAJN — Juneau International
Juneau · elev 25 ft
- PAOH — Hoonah
Hoonah · elev 22 ft
- PAGS — Gustavus
Gustavus · elev 36 ft
Frequently asked questions
How high does density altitude get at PAPG in summer?
On a typical July afternoon — around 62 °F at the nearest NOAA normals station — density altitude at Petersburg James A Johnson reaches roughly 335 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 PAPG on an average day?
It swings with the seasons: from roughly −1,755 ft at the coldest month's average temperature to about −20 ft at the warmest month's — all from a constant field elevation of 113 ft. The month-by-month table above carries the full year.
What is the field elevation of Petersburg James A Johnson?
113 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is PAPG (ICAO) / PSG (FAA), in Petersburg, Alaska.