Bay City, Texas · field elev 45 ft
Density Altitude at Bay City Regional (KBYY)
Bay City Regional sits at 45 ft, and even a typical August afternoon (91 °F) only lifts density altitude to about 2,128 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 | 53.0 | −324 ft | 63.2 | 349 ft |
| February | 56.9 | −65 ft | 66.6 | 570 ft |
| March | 62.5 | 303 ft | 72.2 | 929 ft |
| April | 68.3 | 679 ft | 77.6 | 1,272 ft |
| May | 74.8 | 1,095 ft | 83.5 | 1,641 ft |
| June | 80.1 | 1,429 ft | 88.8 | 1,969 ft |
| July | 81.7 | 1,529 ft | 90.6 | 2,079 ft |
| August | 82.1 | 1,554 ft | 91.4 | 2,128 ft |
| September | 78.3 | 1,316 ft | 88.1 | 1,926 ft |
| October | 70.9 | 846 ft | 81.4 | 1,510 ft |
| November | 61.8 | 257 ft | 72.2 | 929 ft |
| December | 55.2 | −178 ft | 65.3 | 485 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 KBYY
DENSITY ALTITUDE
Field elevation 45 ft — the air behaves like 2,104 ft.
- PRESSURE ALT
- 46 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 Texas fields
- 94R — Gav Air
Wharton · elev 90 ft
- KLBX — Texas Gulf Coast Regional
Angleton/Lake Jackson · elev 25 ft
- KARM — Wharton Regional
Wharton · elev 100 ft
- KPSX — Palacios Municipal
Palacios · elev 14 ft
- 7R9 — Bailes
Angleton · elev 21 ft
- T26 — Flying V Ranch
Louise · elev 60 ft
- 81D — Flyin Tiger
Angleton · elev 30 ft
- 2H5 — Houston Fort Bend
Houston · elev 105 ft
Frequently asked questions
How high does density altitude get at KBYY in summer?
On a typical August afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Bay City Regional reaches roughly 2,128 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 KBYY on an average day?
It swings with the seasons: from roughly −324 ft at the coldest month's average temperature to about 1,554 ft at the warmest month's — all from a constant field elevation of 45 ft. The month-by-month table above carries the full year.
What is the field elevation of Bay City Regional?
45 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBYY (ICAO) / BYY (FAA), in Bay City, Texas.