Greenville, New York · field elev 840 ft
Density Altitude at Greenville-Rainbow (1H4)
Greenville-Rainbow sits at 840 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,364 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 | 22.1 | −1,470 ft | 31.6 | −797 ft |
| February | 23.6 | −1,363 ft | 33.9 | −637 ft |
| March | 32.2 | −756 ft | 42.6 | −39 ft |
| April | 44.9 | 117 ft | 56.2 | 871 ft |
| May | 56.4 | 884 ft | 67.7 | 1,618 ft |
| June | 64.8 | 1,432 ft | 75.1 | 2,088 ft |
| July | 69.3 | 1,720 ft | 79.5 | 2,364 ft |
| August | 67.8 | 1,624 ft | 78.1 | 2,276 ft |
| September | 60.3 | 1,140 ft | 70.9 | 1,822 ft |
| October | 48.9 | 386 ft | 58.8 | 1,042 ft |
| November | 38.3 | −333 ft | 47.4 | 286 ft |
| December | 28.6 | −1,008 ft | 36.6 | −450 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 1H4
DENSITY ALTITUDE
Field elevation 840 ft — the air behaves like 2,395 ft.
- PRESSURE ALT
- 841 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- WATER · GRAINS/LB
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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
- 1I5 — Freehold
Freehold · elev 440 ft
- 4B0 — South Albany
South Bethlehem · elev 196 ft
- 1B1 — Columbia County
Hudson · elev 198 ft
- NY1 — Kline Kill
Ghent · elev 380 ft
- N25 — Blue Heron
Gallupville · elev 1,200 ft
- 1A1 — Green Acres
Livingston · elev 297 ft
- 4B1 — Duanesburg
Duanesburg · elev 714 ft
- KALB — Albany International
Albany · elev 285 ft
Frequently asked questions
How high does density altitude get at 1H4 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Greenville-Rainbow reaches roughly 2,364 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 1H4 on an average day?
It swings with the seasons: from roughly −1,470 ft at the coldest month's average temperature to about 1,720 ft at the warmest month's — all from a constant field elevation of 840 ft. The month-by-month table above carries the full year.
What is the field elevation of Greenville-Rainbow?
840 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1H4 (FAA), in Greenville, New York.