Selinsgrove, Pennsylvania · field elev 464 ft
Density Altitude at Penn Valley (KSEG)
Penn Valley sits at 464 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,202 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 | 28.0 | −1,521 ft | 36.3 | −940 ft |
| February | 30.2 | −1,366 ft | 39.1 | −746 ft |
| March | 39.0 | −753 ft | 49.0 | −73 ft |
| April | 50.1 | 1 ft | 61.9 | 781 ft |
| May | 60.5 | 689 ft | 72.1 | 1,437 ft |
| June | 69.5 | 1,271 ft | 80.6 | 1,973 ft |
| July | 73.3 | 1,513 ft | 84.3 | 2,202 ft |
| August | 71.1 | 1,373 ft | 82.3 | 2,078 ft |
| September | 63.9 | 911 ft | 75.5 | 1,653 ft |
| October | 52.5 | 161 ft | 64.0 | 917 ft |
| November | 41.8 | −561 ft | 51.7 | 108 ft |
| December | 32.9 | −1,176 ft | 40.6 | −643 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 KSEG
DENSITY ALTITUDE
Field elevation 464 ft — the air behaves like 2,184 ft.
- PRESSURE ALT
- 465 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 Pennsylvania fields
- 71N — Sunbury
Sunbury · elev 450 ft
- 8N8 — Danville
Danville · elev 559 ft
- N79 — Northumberland County
Shamokin · elev 881 ft
- 74N — Bendigo
Tower City · elev 791 ft
- N13 — Bloomsburg Municipal
Bloomsburg · elev 481 ft
- KZER — Schuylkill County/Joe Zerbey
Pottsville · elev 1,730 ft
- KIPT — Williamsport Regional
Williamsport · elev 528 ft
- P34 — Mifflintown
Mifflintown · elev 545 ft
Frequently asked questions
How high does density altitude get at KSEG in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Penn Valley reaches roughly 2,202 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 KSEG on an average day?
It swings with the seasons: from roughly −1,521 ft at the coldest month's average temperature to about 1,513 ft at the warmest month's — all from a constant field elevation of 464 ft. The month-by-month table above carries the full year.
What is the field elevation of Penn Valley?
464 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSEG (ICAO) / SEG (FAA), in Selinsgrove, Pennsylvania.