Centre Hall, Pennsylvania · field elev 1,245 ft
Density Altitude at Penns Cave (N74)
Penns Cave sits at 1,245 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 3,136 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 | 23.5 | −862 ft | 32.3 | −243 ft |
| February | 27.0 | −614 ft | 36.6 | 54 ft |
| March | 35.2 | −42 ft | 45.7 | 674 ft |
| April | 47.2 | 774 ft | 59.7 | 1,600 ft |
| May | 58.0 | 1,489 ft | 70.9 | 2,319 ft |
| June | 67.0 | 2,071 ft | 79.4 | 2,852 ft |
| July | 71.2 | 2,338 ft | 84.0 | 3,136 ft |
| August | 69.0 | 2,198 ft | 81.7 | 2,995 ft |
| September | 61.4 | 1,710 ft | 73.9 | 2,508 ft |
| October | 49.7 | 941 ft | 61.5 | 1,717 ft |
| November | 38.5 | 185 ft | 48.3 | 848 ft |
| December | 29.8 | −417 ft | 37.7 | 130 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 N74
DENSITY ALTITUDE
Field elevation 1,245 ft — the air behaves like 3,136 ft.
- PRESSURE ALT
- 1,246 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
- N16 — Centre Airpark
Centre Hall · elev 1,307 ft
- N96 — Bellefonte
Bellefonte · elev 1,072 ft
- KUNV — State College Regional
State College · elev 1,231 ft
- KRVL — Mifflin County
Reedsville · elev 819 ft
- KLHV — William T Piper Meml
Lock Haven · elev 556 ft
- P34 — Mifflintown
Mifflintown · elev 545 ft
- KPSB — Mid-State
Philipsburg · elev 1,948 ft
- P96 — Jersey Shore
Jersey Shore · elev 554 ft
Frequently asked questions
How high does density altitude get at N74 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Penns Cave reaches roughly 3,136 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 N74 on an average day?
It swings with the seasons: from roughly −862 ft at the coldest month's average temperature to about 2,338 ft at the warmest month's — all from a constant field elevation of 1,245 ft. The month-by-month table above carries the full year.
What is the field elevation of Penns Cave?
1,245 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N74 (FAA), in Centre Hall, Pennsylvania.