Farmingdale, New York · field elev 82 ft
Density Altitude at Republic (KFRG)
Republic sits at 82 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 1,643 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 | 32.0 | −1,717 ft | 38.9 | −1,236 ft |
| February | 33.9 | −1,584 ft | 41.3 | −1,071 ft |
| March | 40.4 | −1,132 ft | 48.1 | −607 ft |
| April | 50.2 | −466 ft | 58.4 | 80 ft |
| May | 59.7 | 165 ft | 68.1 | 712 ft |
| June | 69.1 | 776 ft | 77.2 | 1,292 ft |
| July | 75.3 | 1,172 ft | 82.8 | 1,643 ft |
| August | 74.1 | 1,096 ft | 81.5 | 1,562 ft |
| September | 67.2 | 654 ft | 74.8 | 1,140 ft |
| October | 56.1 | −72 ft | 63.9 | 440 ft |
| November | 45.9 | −756 ft | 53.4 | −252 ft |
| December | 37.5 | −1,333 ft | 44.2 | −872 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 KFRG
DENSITY ALTITUDE
Field elevation 82 ft — the air behaves like 1,655 ft.
- PRESSURE ALT
- 83 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
- KISP — Long Island Mac Arthur
New York · elev 99 ft
- 23N — Bayport Aerodrome
Bayport · elev 39 ft
- KJFK — John F Kennedy International
New York · elev 13 ft
- KLGA — Laguardia
New York · elev 21 ft
- KHPN — Westchester County
White Plains · elev 439 ft
- KHWV — Brookhaven
Shirley · elev 81 ft
- KFOK — Francis S Gabreski
Westhampton Beach · elev 66 ft
- 21N — Mattituck
Mattituck · elev 30 ft
Frequently asked questions
How high does density altitude get at KFRG in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Republic reaches roughly 1,643 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 KFRG on an average day?
It swings with the seasons: from roughly −1,717 ft at the coldest month's average temperature to about 1,172 ft at the warmest month's — all from a constant field elevation of 82 ft. The month-by-month table above carries the full year.
What is the field elevation of Republic?
82 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KFRG (ICAO) / FRG (FAA), in Farmingdale, New York.