Edgartown, Massachusetts · field elev 18 ft
Density Altitude at Katama Airpark (1B2)
Katama Airpark sits at 18 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 1,415 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 | 32.9 | −1,734 ft | 40.1 | −1,233 ft |
| February | 34.1 | −1,650 ft | 41.5 | −1,136 ft |
| March | 39.0 | −1,309 ft | 46.4 | −802 ft |
| April | 47.5 | −727 ft | 55.4 | −198 ft |
| May | 56.7 | −111 ft | 64.9 | 426 ft |
| June | 65.7 | 478 ft | 73.8 | 998 ft |
| July | 72.3 | 903 ft | 80.4 | 1,415 ft |
| August | 71.9 | 877 ft | 79.9 | 1,383 ft |
| September | 66.2 | 510 ft | 74.0 | 1,011 ft |
| October | 56.1 | −151 ft | 64.0 | 368 ft |
| November | 47.0 | −761 ft | 54.4 | −264 ft |
| December | 38.4 | −1,350 ft | 45.5 | −863 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 1B2
DENSITY ALTITUDE
Field elevation 18 ft — the air behaves like 1,390 ft.
- PRESSURE ALT
- 19 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
- KMVY — Martha'S Vineyard
Vineyard Haven · elev 67 ft
- 5B6 — Falmouth Airpark
Falmouth · elev 41 ft
- 2B1 — Cape Cod
Marston Mills · elev 103 ft
- KHYA — Cape Cod Gateway
Hyannis · elev 54 ft
- KACK — Nantucket Meml
Nantucket · elev 47 ft
- KEWB — New Bedford Regional
New Bedford · elev 79 ft
- KCQX — Chatham Municipal
Chatham · elev 64 ft
- KPYM — Plymouth Municipal
Plymouth · elev 148 ft
Frequently asked questions
How high does density altitude get at 1B2 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Katama Airpark reaches roughly 1,415 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 1B2 on an average day?
It swings with the seasons: from roughly −1,734 ft at the coldest month's average temperature to about 903 ft at the warmest month's — all from a constant field elevation of 18 ft. The month-by-month table above carries the full year.
What is the field elevation of Katama Airpark?
18 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1B2 (FAA), in Edgartown, Massachusetts.