Watertown, New York · field elev 331 ft
Density Altitude at Watertown International (KART)
Watertown International sits at 331 ft, and even a typical July afternoon (79 °F) only lifts density altitude to about 1,722 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 | 19.9 | −2,267 ft | 29.8 | −1,560 ft |
| February | 21.1 | −2,181 ft | 31.4 | −1,448 ft |
| March | 30.4 | −1,518 ft | 40.0 | −850 ft |
| April | 43.1 | −637 ft | 53.7 | 77 ft |
| May | 55.0 | 163 ft | 66.2 | 896 ft |
| June | 63.8 | 740 ft | 74.5 | 1,426 ft |
| July | 69.0 | 1,076 ft | 79.2 | 1,722 ft |
| August | 67.5 | 979 ft | 78.2 | 1,660 ft |
| September | 60.0 | 492 ft | 71.2 | 1,217 ft |
| October | 48.8 | −251 ft | 58.4 | 387 ft |
| November | 38.0 | −988 ft | 46.6 | −400 ft |
| December | 27.3 | −1,737 ft | 35.5 | −1,161 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 KART
DENSITY ALTITUDE
Field elevation 331 ft — the air behaves like 1,710 ft.
- PRESSURE ALT
- 332 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
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- KOGS — Ogdensburg International
Ogdensburg · elev 302 ft
- K16 — Becks Grove
Rome · elev 450 ft
- KRME — Griffiss International
Rome · elev 504 ft
- KSYR — Syracuse Hancock International
Syracuse · elev 421 ft
- B16 — Whitfords
Weedsport · elev 400 ft
Frequently asked questions
How high does density altitude get at KART in summer?
On a typical July afternoon — around 79 °F at the nearest NOAA normals station — density altitude at Watertown International reaches roughly 1,722 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 KART on an average day?
It swings with the seasons: from roughly −2,267 ft at the coldest month's average temperature to about 1,076 ft at the warmest month's — all from a constant field elevation of 331 ft. The month-by-month table above carries the full year.
What is the field elevation of Watertown International?
331 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KART (ICAO) / ART (FAA), in Watertown, New York.