Chatham, Massachusetts · field elev 64 ft
Density Altitude at Chatham Municipal (KCQX)
Chatham Municipal sits at 64 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 1,364 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 | −1,732 ft | 38.6 | −1,279 ft |
| February | 32.7 | −1,690 ft | 39.5 | −1,217 ft |
| March | 37.6 | −1,348 ft | 43.9 | −915 ft |
| April | 45.6 | −799 ft | 52.3 | −347 ft |
| May | 55.0 | −167 ft | 61.9 | 287 ft |
| June | 64.3 | 444 ft | 71.5 | 908 ft |
| July | 71.4 | 902 ft | 78.7 | 1,364 ft |
| August | 70.6 | 850 ft | 77.7 | 1,301 ft |
| September | 64.3 | 444 ft | 71.1 | 882 ft |
| October | 54.3 | −214 ft | 61.3 | 248 ft |
| November | 45.4 | −813 ft | 52.1 | −361 ft |
| December | 37.3 | −1,369 ft | 43.9 | −915 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 KCQX
DENSITY ALTITUDE
Field elevation 64 ft — the air behaves like 1,383 ft.
- PRESSURE ALT
- 65 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
- KHYA — Cape Cod Gateway
Hyannis · elev 54 ft
- 2B1 — Cape Cod
Marston Mills · elev 103 ft
- KPVC — Provincetown Municipal
Provincetown · elev 8 ft
- 5B6 — Falmouth Airpark
Falmouth · elev 41 ft
- KACK — Nantucket Meml
Nantucket · elev 47 ft
- 1B2 — Katama Airpark
Edgartown · elev 18 ft
- KMVY — Martha'S Vineyard
Vineyard Haven · elev 67 ft
- KPYM — Plymouth Municipal
Plymouth · elev 148 ft
Frequently asked questions
How high does density altitude get at KCQX in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Chatham Municipal reaches roughly 1,364 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 KCQX on an average day?
It swings with the seasons: from roughly −1,732 ft at the coldest month's average temperature to about 902 ft at the warmest month's — all from a constant field elevation of 64 ft. The month-by-month table above carries the full year.
What is the field elevation of Chatham Municipal?
64 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KCQX (ICAO) / CQX (FAA), in Chatham, Massachusetts.