Gasport, New York · field elev 628 ft
Density Altitude at Royalton (9G5)
Royalton sits at 628 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,279 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 | 25.4 | −1,500 ft | 32.7 | −985 ft |
| February | 27.1 | −1,379 ft | 35.0 | −825 ft |
| March | 34.9 | −832 ft | 44.2 | −194 ft |
| April | 45.8 | −85 ft | 55.9 | 590 ft |
| May | 58.5 | 761 ft | 69.4 | 1,466 ft |
| June | 67.7 | 1,357 ft | 78.1 | 2,017 ft |
| July | 71.8 | 1,619 ft | 82.3 | 2,279 ft |
| August | 70.4 | 1,530 ft | 80.0 | 2,136 ft |
| September | 63.8 | 1,106 ft | 73.8 | 1,746 ft |
| October | 51.7 | 311 ft | 60.9 | 918 ft |
| November | 41.2 | −398 ft | 48.8 | 117 ft |
| December | 31.1 | −1,097 ft | 38.3 | −597 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 9G5
DENSITY ALTITUDE
Field elevation 628 ft — the air behaves like 2,260 ft.
- PRESSURE ALT
- 629 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
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- 9G6 — Pine Hill
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- KBQR — Buffalo-Lancaster Regional
Buffalo · elev 752 ft
- KBUF — Buffalo Niagara International
Buffalo · elev 727 ft
- KIAG — Niagara Falls International
Niagara Falls · elev 592 ft
- KGVQ — Genesee County
Batavia · elev 914 ft
Frequently asked questions
How high does density altitude get at 9G5 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Royalton reaches roughly 2,279 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 9G5 on an average day?
It swings with the seasons: from roughly −1,500 ft at the coldest month's average temperature to about 1,619 ft at the warmest month's — all from a constant field elevation of 628 ft. The month-by-month table above carries the full year.
What is the field elevation of Royalton?
628 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 9G5 (FAA), in Gasport, New York.