Bedford, Indiana · field elev 727 ft
Density Altitude at Virgil I Grissom Municipal (KBFR)
Virgil I Grissom Municipal sits at 727 ft, and even a typical August afternoon (84 °F) only lifts density altitude to about 2,499 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 | 31.0 | −981 ft | 39.0 | −426 ft |
| February | 34.6 | −729 ft | 43.1 | −145 ft |
| March | 44.5 | −50 ft | 53.8 | 573 ft |
| April | 55.0 | 652 ft | 64.9 | 1,299 ft |
| May | 63.5 | 1,208 ft | 73.1 | 1,823 ft |
| June | 72.0 | 1,753 ft | 81.3 | 2,337 ft |
| July | 74.7 | 1,924 ft | 83.5 | 2,474 ft |
| August | 73.9 | 1,874 ft | 83.9 | 2,499 ft |
| September | 67.1 | 1,441 ft | 77.1 | 2,075 ft |
| October | 56.1 | 725 ft | 66.2 | 1,383 ft |
| November | 44.5 | −50 ft | 53.0 | 520 ft |
| December | 35.3 | −681 ft | 42.5 | −186 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 KBFR
DENSITY ALTITUDE
Field elevation 727 ft — the air behaves like 2,505 ft.
- PRESSURE ALT
- 728 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
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Frequently asked questions
How high does density altitude get at KBFR in summer?
On a typical August afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Virgil I Grissom Municipal reaches roughly 2,499 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 KBFR on an average day?
It swings with the seasons: from roughly −981 ft at the coldest month's average temperature to about 1,924 ft at the warmest month's — all from a constant field elevation of 727 ft. The month-by-month table above carries the full year.
What is the field elevation of Virgil I Grissom Municipal?
727 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBFR (ICAO) / BFR (FAA), in Bedford, Indiana.