Falmouth, Massachusetts · field elev 41 ft
Density Altitude at Falmouth Airpark (5B6)
Falmouth Airpark sits at 41 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 1,368 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 | 32.1 | −1,761 ft | 39.1 | −1,273 ft |
| February | 33.0 | −1,698 ft | 40.5 | −1,177 ft |
| March | 37.2 | −1,405 ft | 44.7 | −889 ft |
| April | 46.9 | −739 ft | 54.8 | −209 ft |
| May | 56.1 | −123 ft | 64.0 | 396 ft |
| June | 65.0 | 461 ft | 72.4 | 937 ft |
| July | 71.8 | 899 ft | 79.2 | 1,368 ft |
| August | 71.8 | 899 ft | 79.0 | 1,355 ft |
| September | 66.0 | 526 ft | 72.8 | 963 ft |
| October | 55.8 | −143 ft | 62.5 | 298 ft |
| November | 46.4 | −773 ft | 53.3 | −309 ft |
| December | 38.2 | −1,335 ft | 44.7 | −889 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 5B6
DENSITY ALTITUDE
Field elevation 41 ft — the air behaves like 1,355 ft.
- PRESSURE ALT
- 42 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 Massachusetts fields
- 2B1 — Cape Cod
Marston Mills · elev 103 ft
- KMVY — Martha'S Vineyard
Vineyard Haven · elev 67 ft
- KHYA — Cape Cod Gateway
Hyannis · elev 54 ft
- 1B2 — Katama Airpark
Edgartown · elev 18 ft
- KEWB — New Bedford Regional
New Bedford · elev 79 ft
- KPYM — Plymouth Municipal
Plymouth · elev 148 ft
- KCQX — Chatham Municipal
Chatham · elev 64 ft
- 1M8 — Myricks
Berkley · elev 73 ft
Frequently asked questions
How high does density altitude get at 5B6 in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Falmouth Airpark reaches roughly 1,368 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 5B6 on an average day?
It swings with the seasons: from roughly −1,761 ft at the coldest month's average temperature to about 899 ft at the warmest month's — all from a constant field elevation of 41 ft. The month-by-month table above carries the full year.
What is the field elevation of Falmouth Airpark?
41 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5B6 (FAA), in Falmouth, Massachusetts.