Vergennes, Vermont · field elev 124 ft
Density Altitude at Basin Harbor (B06)
Basin Harbor sits at 124 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 1,682 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 | 19.4 | −2,564 ft | 28.9 | −1,883 ft |
| February | 21.0 | −2,448 ft | 32.0 | −1,664 ft |
| March | 30.4 | −1,777 ft | 40.5 | −1,073 ft |
| April | 44.4 | −806 ft | 55.2 | −80 ft |
| May | 56.6 | 13 ft | 67.9 | 751 ft |
| June | 66.3 | 647 ft | 77.0 | 1,331 ft |
| July | 71.7 | 994 ft | 82.6 | 1,682 ft |
| August | 69.9 | 879 ft | 81.0 | 1,582 ft |
| September | 61.6 | 342 ft | 72.6 | 1,052 ft |
| October | 49.5 | −461 ft | 59.2 | 184 ft |
| November | 37.9 | −1,253 ft | 46.7 | −650 ft |
| December | 27.0 | −2,018 ft | 35.6 | −1,412 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 B06
DENSITY ALTITUDE
Field elevation 124 ft — the air behaves like 1,707 ft.
- PRESSURE ALT
- 125 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 Vermont fields
- VT8 — Shelburne
Shelburne · elev 325 ft
- 6B0 — Middlebury State
Middlebury · elev 494 ft
- KBTV — Patrick Leahy Burlington International
Burlington · elev 335 ft
- 0B7 — Warren-Sugarbush
Warren · elev 1,470 ft
- KMPV — Edward F Knapp State
Barre/Montpelier · elev 1,166 ft
- KMVL — Morrisville-Stowe State
Morrisville · elev 733 ft
- KRUT — Rutland/Southern Vermont Regional
Rutland · elev 787 ft
- KFSO — Franklin County State
Highgate · elev 228 ft
Frequently asked questions
How high does density altitude get at B06 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Basin Harbor reaches roughly 1,682 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 B06 on an average day?
It swings with the seasons: from roughly −2,564 ft at the coldest month's average temperature to about 994 ft at the warmest month's — all from a constant field elevation of 124 ft. The month-by-month table above carries the full year.
What is the field elevation of Basin Harbor?
124 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is B06 (FAA), in Vergennes, Vermont.