Ellenville, New York · field elev 290 ft
Density Altitude at Joseph Y Resnick (N89)
Joseph Y Resnick sits at 290 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 1,947 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 | 25.9 | −1,888 ft | 34.6 | −1,275 ft |
| February | 28.1 | −1,732 ft | 37.8 | −1,053 ft |
| March | 36.7 | −1,129 ft | 46.7 | −444 ft |
| April | 48.0 | −356 ft | 59.9 | 435 ft |
| May | 58.5 | 343 ft | 70.5 | 1,122 ft |
| June | 67.4 | 923 ft | 78.9 | 1,653 ft |
| July | 72.2 | 1,230 ft | 83.6 | 1,947 ft |
| August | 70.4 | 1,115 ft | 81.5 | 1,816 ft |
| September | 62.6 | 612 ft | 74.1 | 1,351 ft |
| October | 51.3 | −134 ft | 62.3 | 592 ft |
| November | 40.5 | −867 ft | 50.4 | −195 ft |
| December | 31.3 | −1,506 ft | 39.4 | −942 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 N89
DENSITY ALTITUDE
Field elevation 290 ft — the air behaves like 1,971 ft.
- PRESSURE ALT
- 291 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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- KMGJ — Orange County
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- 06N — Randall
Middletown · elev 523 ft
- KSWF — New York Stewart International
New York · elev 491 ft
- KMSV — Sullivan County International
Monticello · elev 1,403 ft
- KPOU — Hudson Valley Regional
Poughkeepsie · elev 164 ft
- 09N — Airhaven
Staatsburg · elev 450 ft
Frequently asked questions
How high does density altitude get at N89 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Joseph Y Resnick reaches roughly 1,947 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 N89 on an average day?
It swings with the seasons: from roughly −1,888 ft at the coldest month's average temperature to about 1,230 ft at the warmest month's — all from a constant field elevation of 290 ft. The month-by-month table above carries the full year.
What is the field elevation of Joseph Y Resnick?
290 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is N89 (FAA), in Ellenville, New York.