Shamokin, Pennsylvania · field elev 881 ft
Density Altitude at Northumberland County (N79)
Northumberland County sits at 881 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,674 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 | 27.1 | −1,063 ft | 34.8 | −524 ft |
| February | 30.1 | −851 ft | 38.3 | −282 ft |
| March | 38.1 | −296 ft | 47.7 | 357 ft |
| April | 49.7 | 491 ft | 60.7 | 1,216 ft |
| May | 59.8 | 1,158 ft | 71.4 | 1,904 ft |
| June | 68.1 | 1,694 ft | 78.9 | 2,376 ft |
| July | 72.5 | 1,974 ft | 83.7 | 2,674 ft |
| August | 70.3 | 1,834 ft | 80.3 | 2,463 ft |
| September | 63.5 | 1,398 ft | 74.2 | 2,081 ft |
| October | 52.3 | 664 ft | 62.2 | 1,314 ft |
| November | 41.5 | −63 ft | 49.8 | 497 ft |
| December | 32.6 | −676 ft | 39.7 | −186 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 N79
DENSITY ALTITUDE
Field elevation 881 ft — the air behaves like 2,693 ft.
- PRESSURE ALT
- 882 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
- 8N8 — Danville
Danville · elev 559 ft
- 71N — Sunbury
Sunbury · elev 450 ft
- N13 — Bloomsburg Municipal
Bloomsburg · elev 481 ft
- KZER — Schuylkill County/Joe Zerbey
Pottsville · elev 1,730 ft
- KSEG — Penn Valley
Selinsgrove · elev 464 ft
- 74N — Bendigo
Tower City · elev 791 ft
- 9N7 — Farmers Pride
Fredericksburg · elev 495 ft
- 8N1 — Grimes
Bethel · elev 582 ft
Frequently asked questions
How high does density altitude get at N79 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Northumberland County reaches roughly 2,674 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 N79 on an average day?
It swings with the seasons: from roughly −1,063 ft at the coldest month's average temperature to about 1,974 ft at the warmest month's — all from a constant field elevation of 881 ft. The month-by-month table above carries the full year.
What is the field elevation of Northumberland County?
881 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N79 (FAA), in Shamokin, Pennsylvania.