Rochester, New York · field elev 559 ft
Density Altitude at Frederick Douglass/Greater Rochester International (KROC)
Frederick Douglass/Greater Rochester International sits at 559 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,207 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 | 26.2 | −1,530 ft | 33.4 | −1,023 ft |
| February | 27.4 | −1,445 ft | 35.2 | −897 ft |
| March | 35.2 | −897 ft | 43.6 | −320 ft |
| April | 46.8 | −103 ft | 56.6 | 551 ft |
| May | 58.8 | 695 ft | 69.4 | 1,382 ft |
| June | 67.6 | 1,266 ft | 77.9 | 1,920 ft |
| July | 72.3 | 1,566 ft | 82.5 | 2,207 ft |
| August | 70.7 | 1,465 ft | 80.5 | 2,082 ft |
| September | 63.6 | 1,008 ft | 73.6 | 1,649 ft |
| October | 52.2 | 259 ft | 61.2 | 852 ft |
| November | 41.5 | −463 ft | 49.1 | 52 ft |
| December | 32.0 | −1,121 ft | 38.5 | −669 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 KROC
DENSITY ALTITUDE
Field elevation 559 ft — the air behaves like 2,238 ft.
- PRESSURE ALT
- 560 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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- 5G0 — Le Roy
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- KIUA — Canandaigua
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- D52 — Geneseo
Geneseo · elev 560 ft
- KGVQ — Genesee County
Batavia · elev 914 ft
- KSDC — Williamson/Sodus
Williamson/Sodus · elev 424 ft
- 9G6 — Pine Hill
Albion · elev 669 ft
Frequently asked questions
How high does density altitude get at KROC in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Frederick Douglass/Greater Rochester International reaches roughly 2,207 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 KROC on an average day?
It swings with the seasons: from roughly −1,530 ft at the coldest month's average temperature to about 1,566 ft at the warmest month's — all from a constant field elevation of 559 ft. The month-by-month table above carries the full year.
What is the field elevation of Frederick Douglass/Greater Rochester International?
559 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KROC (ICAO) / ROC (FAA), in Rochester, New York.