Allentown, Pennsylvania · field elev 399 ft
Density Altitude at Allentown Queen City Municipal (KXLL)
Allentown Queen City Municipal sits at 399 ft, and even a typical July afternoon (86 °F) only lifts density altitude to about 2,253 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 | 30.1 | −1,454 ft | 38.4 | −875 ft |
| February | 32.4 | −1,292 ft | 41.6 | −655 ft |
| March | 40.7 | −717 ft | 50.8 | −33 ft |
| April | 51.8 | 34 ft | 63.4 | 798 ft |
| May | 62.0 | 707 ft | 73.5 | 1,446 ft |
| June | 70.9 | 1,281 ft | 81.9 | 1,974 ft |
| July | 75.6 | 1,579 ft | 86.4 | 2,253 ft |
| August | 73.6 | 1,453 ft | 84.3 | 2,123 ft |
| September | 66.3 | 986 ft | 77.4 | 1,693 ft |
| October | 54.6 | 221 ft | 65.5 | 934 ft |
| November | 43.9 | −498 ft | 53.8 | 167 ft |
| December | 35.0 | −1,111 ft | 43.1 | −553 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 KXLL
DENSITY ALTITUDE
Field elevation 399 ft — the air behaves like 2,228 ft.
- PRESSURE ALT
- 400 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
- KABE — Lehigh Valley International
Allentown · elev 394 ft
- KUKT — Quakertown
Quakertown · elev 525 ft
- 7N8 — Butter Valley Golf Port
Bally · elev 500 ft
- 69N — Slatington
Slatington · elev 380 ft
- P91 — Flying M Aerodrome
Germansville · elev 735 ft
- KCKZ — Pennridge
Perkasie · elev 568 ft
- N43 — Braden Airpark
Easton · elev 397 ft
- 14N — Beltzville
Lehighton · elev 899 ft
Frequently asked questions
How high does density altitude get at KXLL in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Allentown Queen City Municipal reaches roughly 2,253 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 KXLL on an average day?
It swings with the seasons: from roughly −1,454 ft at the coldest month's average temperature to about 1,579 ft at the warmest month's — all from a constant field elevation of 399 ft. The month-by-month table above carries the full year.
What is the field elevation of Allentown Queen City Municipal?
399 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KXLL (ICAO) / XLL (FAA), in Allentown, Pennsylvania.