Factoryville, Pennsylvania · field elev 1,209 ft
Density Altitude at Seamans Field (9N3)
Seamans Field sits at 1,209 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,827 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 | 21.8 | −1,028 ft | 31.1 | −372 ft |
| February | 23.0 | −943 ft | 33.2 | −225 ft |
| March | 31.1 | −372 ft | 41.2 | 324 ft |
| April | 43.2 | 460 ft | 54.9 | 1,241 ft |
| May | 54.7 | 1,228 ft | 67.1 | 2,033 ft |
| June | 63.5 | 1,802 ft | 74.8 | 2,521 ft |
| July | 67.7 | 2,071 ft | 79.7 | 2,827 ft |
| August | 66.5 | 1,994 ft | 78.6 | 2,758 ft |
| September | 58.9 | 1,503 ft | 71.2 | 2,294 ft |
| October | 47.6 | 757 ft | 59.0 | 1,510 ft |
| November | 37.0 | 37 ft | 46.6 | 690 ft |
| December | 27.4 | −631 ft | 35.6 | −59 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 9N3
DENSITY ALTITUDE
Field elevation 1,209 ft — the air behaves like 2,845 ft.
- PRESSURE ALT
- 1,210 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
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Frequently asked questions
How high does density altitude get at 9N3 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Seamans Field reaches roughly 2,827 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 9N3 on an average day?
It swings with the seasons: from roughly −1,028 ft at the coldest month's average temperature to about 2,071 ft at the warmest month's — all from a constant field elevation of 1,209 ft. The month-by-month table above carries the full year.
What is the field elevation of Seamans Field?
1,209 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 9N3 (FAA), in Factoryville, Pennsylvania.