Billings, Montana · field elev 3,662 ft
Density Altitude at Billings Logan International (KBIL)
From a field elevation of 3,662 ft, a typical July afternoon at Billings Logan International (87 °F) raises density altitude to about 6,275 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 27.0 | 2,404 ft | 36.0 | 3,018 ft |
| February | 29.4 | 2,569 ft | 39.2 | 3,233 ft |
| March | 38.0 | 3,153 ft | 49.0 | 3,882 ft |
| April | 45.8 | 3,672 ft | 56.9 | 4,393 ft |
| May | 55.3 | 4,290 ft | 66.9 | 5,027 ft ▲ |
| June | 64.7 | 4,889 ft | 77.0 | 5,652 ft ▲ |
| July | 73.3 | 5,425 ft | 87.3 | 6,275 ft ▲ |
| August | 71.6 | 5,320 ft | 85.8 | 6,185 ft ▲ |
| September | 61.4 | 4,680 ft | 74.3 | 5,486 ft ▲ |
| October | 47.9 | 3,810 ft | 58.8 | 4,515 ft |
| November | 36.2 | 3,032 ft | 45.7 | 3,665 ft |
| December | 27.6 | 2,445 ft | 36.1 | 3,025 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 KBIL
DENSITY ALTITUDE caution
Field elevation 3,662 ft — the air behaves like 6,257 ft.
- PRESSURE ALT
- 3,664 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 Montana fields
- 6S8 — Laurel Municipal
Laurel · elev 3,543 ft
- 6S3 — Woltermann Meml
Columbus · elev 3,578 ft
- 80S — Lavina
Lavina · elev 3,512 ft
- 6S1 — Bridger Municipal
Bridger · elev 3,720 ft
- 00U — Big Horn County
Hardin · elev 3,025 ft
- 5U7 — Fort Smith Landing Strip
Fort Smith · elev 3,242 ft
- KRPX — Roundup
Roundup · elev 3,490 ft
- 8U0 — Ryegate
Ryegate · elev 3,689 ft
Frequently asked questions
How high does density altitude get at KBIL in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Billings Logan International reaches roughly 6,275 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 KBIL on an average day?
It swings with the seasons: from roughly 2,404 ft at the coldest month's average temperature to about 5,425 ft at the warmest month's — all from a constant field elevation of 3,662 ft. The month-by-month table above carries the full year.
What is the field elevation of Billings Logan International?
3,662 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KBIL (ICAO) / BIL (FAA), in Billings, Montana.