Belfast, Maine · field elev 198 ft
Density Altitude at Belfast Municipal (KBST)
Belfast Municipal sits at 198 ft, and even a typical July afternoon (77 °F) only lifts density altitude to about 1,421 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 | 19.8 | −2,442 ft | 29.5 | −1,748 ft |
| February | 21.9 | −2,290 ft | 32.2 | −1,558 ft |
| March | 30.1 | −1,706 ft | 39.7 | −1,036 ft |
| April | 41.3 | −926 ft | 51.5 | −235 ft |
| May | 52.1 | −195 ft | 62.9 | 518 ft |
| June | 61.0 | 394 ft | 71.5 | 1,072 ft |
| July | 66.8 | 771 ft | 77.0 | 1,421 ft |
| August | 66.0 | 719 ft | 76.4 | 1,384 ft |
| September | 58.8 | 250 ft | 69.5 | 944 ft |
| October | 47.7 | −490 ft | 57.4 | 157 ft |
| November | 37.2 | −1,209 ft | 45.6 | −633 ft |
| December | 26.6 | −1,954 ft | 34.9 | −1,369 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 KBST
DENSITY ALTITUDE
Field elevation 198 ft — the air behaves like 1,421 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 Maine fields
- 57B — Islesboro
Islesboro · elev 88 ft
- 93B — Stonington Municipal
Stonington · elev 32 ft
- KRKD — Knox County Regional
Rockland · elev 55 ft
- 0B2 — Brewer
Brewer · elev 125 ft
- KBGR — Bangor International
Bangor · elev 192 ft
- 2B7 — Pittsfield Municipal
Pittsfield · elev 197 ft
- PG1 — Griffin Field
Levant · elev 200 ft
- KBHB — Hancock County/Bar Harbor
Bar Harbor · elev 83 ft
Frequently asked questions
How high does density altitude get at KBST in summer?
On a typical July afternoon — around 77 °F at the nearest NOAA normals station — density altitude at Belfast Municipal reaches roughly 1,421 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 KBST on an average day?
It swings with the seasons: from roughly −2,442 ft at the coldest month's average temperature to about 771 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 Belfast Municipal?
198 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBST (ICAO) / BST (FAA), in Belfast, Maine.