Key West, Florida · field elev 3 ft
Density Altitude at Key West International (KEYW)
Key West International sits at 3 ft, and even a typical August afternoon (91 °F) only lifts density altitude to about 2,028 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 | 70.6 | 775 ft | 75.8 | 1,107 ft |
| February | 72.3 | 884 ft | 77.4 | 1,208 ft |
| March | 74.4 | 1,018 ft | 79.6 | 1,346 ft |
| April | 77.9 | 1,239 ft | 82.6 | 1,534 ft |
| May | 81.1 | 1,440 ft | 85.9 | 1,739 ft |
| June | 84.1 | 1,627 ft | 88.7 | 1,911 ft |
| July | 85.4 | 1,708 ft | 90.2 | 2,003 ft |
| August | 85.5 | 1,714 ft | 90.6 | 2,028 ft |
| September | 84.1 | 1,627 ft | 89.0 | 1,930 ft |
| October | 81.3 | 1,453 ft | 85.8 | 1,733 ft |
| November | 76.6 | 1,157 ft | 81.0 | 1,434 ft |
| December | 73.0 | 929 ft | 77.7 | 1,227 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 KEYW
DENSITY ALTITUDE
Field elevation 3 ft — the air behaves like 2,052 ft.
- PRESSURE ALT
- 4 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 Florida fields
- KMTH — The Florida Keys Marathon International
Marathon · elev 7 ft
- X01 — Everglades Airpark
Everglades City · elev 4 ft
- KMKY — Marco Island Exec
Marco Island · elev 5 ft
- X51 — Miami Homestead General Aviation
Homestead · elev 7 ft
- KTNT — Dade-Collier Training And Transition
Miami · elev 13 ft
- KAPF — Naples Municipal
Naples · elev 8 ft
- KTMB — Miami Exec
Miami · elev 10 ft
- KMIA — Miami International
Miami · elev 9 ft
Frequently asked questions
How high does density altitude get at KEYW in summer?
On a typical August afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Key West International reaches roughly 2,028 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 KEYW on an average day?
It swings with the seasons: from roughly 775 ft at the coldest month's average temperature to about 1,714 ft at the warmest month's — all from a constant field elevation of 3 ft. The month-by-month table above carries the full year.
What is the field elevation of Key West International?
3 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KEYW (ICAO) / EYW (FAA), in Key West, Florida.