Jamestown, New York · field elev 1,723 ft
Density Altitude at Chautauqua County/Jamestown (KJHW)
Chautauqua County/Jamestown sits at 1,723 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 3,491 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 | 24.2 | −214 ft | 32.4 | 360 ft |
| February | 25.2 | −143 ft | 34.6 | 512 ft |
| March | 33.3 | 422 ft | 43.5 | 1,118 ft |
| April | 45.4 | 1,246 ft | 56.9 | 2,007 ft |
| May | 56.5 | 1,980 ft | 68.8 | 2,772 ft |
| June | 65.1 | 2,536 ft | 76.5 | 3,256 ft |
| July | 68.8 | 2,772 ft | 80.3 | 3,491 ft |
| August | 67.8 | 2,708 ft | 79.4 | 3,436 ft |
| September | 61.2 | 2,286 ft | 73.0 | 3,037 ft |
| October | 50.0 | 1,553 ft | 60.6 | 2,247 ft |
| November | 39.3 | 834 ft | 48.0 | 1,420 ft |
| December | 30.2 | 207 ft | 37.2 | 691 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 KJHW
DENSITY ALTITUDE
Field elevation 1,723 ft — the air behaves like 3,473 ft.
- PRESSURE ALT
- 1,724 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
- D79 — Dart
Mayville · elev 1,330 ft
- D88 — Pratt'S Eastern Divide
Sherman · elev 1,640 ft
- KDKK — Chautauqua County/Dunkirk
Dunkirk · elev 692 ft
- D59 — Gowanda
Gowanda · elev 830 ft
- N56 — Great Valley
Great Valley · elev 1,450 ft
- 4G2 — Hamburg
Hamburg · elev 751 ft
- 8G3 — Giermek Exec
Olean · elev 1,420 ft
- KOLE — Cattaraugus County-Olean
Olean · elev 2,135 ft
Frequently asked questions
How high does density altitude get at KJHW in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Chautauqua County/Jamestown reaches roughly 3,491 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 KJHW on an average day?
It swings with the seasons: from roughly −214 ft at the coldest month's average temperature to about 2,772 ft at the warmest month's — all from a constant field elevation of 1,723 ft. The month-by-month table above carries the full year.
What is the field elevation of Chautauqua County/Jamestown?
1,723 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJHW (ICAO) / JHW (FAA), in Jamestown, New York.