White Plains, New York · field elev 439 ft
Density Altitude at Westchester County (KHPN)
Westchester County sits at 439 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,104 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 | 29.8 | −1,425 ft | 37.3 | −902 ft |
| February | 31.9 | −1,278 ft | 40.1 | −709 ft |
| March | 39.1 | −777 ft | 47.6 | −198 ft |
| April | 49.6 | −64 ft | 59.2 | 573 ft |
| May | 59.5 | 593 ft | 69.2 | 1,221 ft |
| June | 68.6 | 1,183 ft | 78.0 | 1,779 ft |
| July | 74.0 | 1,527 ft | 83.2 | 2,104 ft |
| August | 72.4 | 1,426 ft | 81.2 | 1,979 ft |
| September | 65.4 | 977 ft | 74.2 | 1,540 ft |
| October | 54.2 | 243 ft | 63.0 | 821 ft |
| November | 44.2 | −428 ft | 52.2 | 110 ft |
| December | 35.1 | −1,054 ft | 42.3 | −558 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 KHPN
DENSITY ALTITUDE
Field elevation 439 ft — the air behaves like 2,091 ft.
- PRESSURE ALT
- 440 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 New York fields
- KLGA — Laguardia
New York · elev 21 ft
- KFRG — Republic
Farmingdale · elev 82 ft
- KJFK — John F Kennedy International
New York · elev 13 ft
- N72 — Warwick Municipal
Warwick · elev 540 ft
- N69 — Stormville
Stormville · elev 358 ft
- KSWF — New York Stewart International
New York · elev 491 ft
- KISP — Long Island Mac Arthur
New York · elev 99 ft
- KPOU — Hudson Valley Regional
Poughkeepsie · elev 164 ft
Frequently asked questions
How high does density altitude get at KHPN in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Westchester County reaches roughly 2,104 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 KHPN on an average day?
It swings with the seasons: from roughly −1,425 ft at the coldest month's average temperature to about 1,527 ft at the warmest month's — all from a constant field elevation of 439 ft. The month-by-month table above carries the full year.
What is the field elevation of Westchester County?
439 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHPN (ICAO) / HPN (FAA), in White Plains, New York.