Hudson, New York · field elev 198 ft
Density Altitude at Columbia County (1B1)
Columbia County sits at 198 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 1,946 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 | 26.6 | −1,954 ft | 35.4 | −1,334 ft |
| February | 28.9 | −1,790 ft | 38.4 | −1,126 ft |
| March | 37.9 | −1,160 ft | 48.3 | −450 ft |
| April | 50.4 | −309 ft | 62.9 | 518 ft |
| May | 61.4 | 420 ft | 73.8 | 1,219 ft |
| June | 69.5 | 944 ft | 81.2 | 1,685 ft |
| July | 74.0 | 1,232 ft | 85.4 | 1,946 ft |
| August | 72.1 | 1,111 ft | 83.1 | 1,803 ft |
| September | 65.0 | 654 ft | 75.4 | 1,320 ft |
| October | 53.4 | −108 ft | 63.8 | 576 ft |
| November | 42.2 | −864 ft | 51.1 | −262 ft |
| December | 32.3 | −1,551 ft | 39.9 | −1,022 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 1B1
DENSITY ALTITUDE
Field elevation 198 ft — the air behaves like 1,921 ft.
- PRESSURE ALT
- 199 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
- NY1 — Kline Kill
Ghent · elev 380 ft
- 1A1 — Green Acres
Livingston · elev 297 ft
- 1H4 — Greenville-Rainbow
Greenville · elev 840 ft
- 1I5 — Freehold
Freehold · elev 440 ft
- 4B0 — South Albany
South Bethlehem · elev 196 ft
- 20N — Kingston-Ulster
Kingston · elev 147 ft
- 5B7 — Rensselaer County
Troy · elev 440 ft
- KALB — Albany International
Albany · elev 285 ft
Frequently asked questions
How high does density altitude get at 1B1 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Columbia County reaches roughly 1,946 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 1B1 on an average day?
It swings with the seasons: from roughly −1,954 ft at the coldest month's average temperature to about 1,232 ft at the warmest month's — all from a constant field elevation of 198 ft. The month-by-month table above carries the full year.
What is the field elevation of Columbia County?
198 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1B1 (FAA), in Hudson, New York.