Schuylerville, New York · field elev 100 ft
Density Altitude at Garnseys (B04)
Garnseys sits at 100 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 1,727 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 | 23.1 | −2,327 ft | 32.0 | −1,694 ft |
| February | 25.7 | −2,141 ft | 35.4 | −1,456 ft |
| March | 35.1 | −1,477 ft | 45.3 | −775 ft |
| April | 48.1 | −585 ft | 60.3 | 227 ft |
| May | 59.8 | 194 ft | 72.5 | 1,016 ft |
| June | 68.0 | 728 ft | 79.9 | 1,484 ft |
| July | 72.4 | 1,010 ft | 83.8 | 1,727 ft |
| August | 70.7 | 901 ft | 82.1 | 1,621 ft |
| September | 63.3 | 423 ft | 74.9 | 1,169 ft |
| October | 51.3 | −370 ft | 62.1 | 345 ft |
| November | 39.8 | −1,151 ft | 48.7 | −544 ft |
| December | 29.3 | −1,885 ft | 37.0 | −1,345 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 B04
DENSITY ALTITUDE
Field elevation 100 ft — the air behaves like 1,739 ft.
- PRESSURE ALT
- 101 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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Frequently asked questions
How high does density altitude get at B04 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Garnseys reaches roughly 1,727 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 B04 on an average day?
It swings with the seasons: from roughly −2,327 ft at the coldest month's average temperature to about 1,010 ft at the warmest month's — all from a constant field elevation of 100 ft. The month-by-month table above carries the full year.
What is the field elevation of Garnseys?
100 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is B04 (FAA), in Schuylerville, New York.