Bridger, Montana · field elev 3,720 ft
Density Altitude at Bridger Municipal (6S1)
From a field elevation of 3,720 ft, a typical July afternoon at Bridger Municipal (87 °F) raises density altitude to about 6,339 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 | 24.2 | 2,282 ft | 35.4 | 3,050 ft |
| February | 27.0 | 2,476 ft | 38.9 | 3,285 ft |
| March | 36.4 | 3,117 ft | 50.4 | 4,044 ft |
| April | 43.8 | 3,611 ft | 57.7 | 4,516 ft |
| May | 53.5 | 4,245 ft | 67.4 | 5,129 ft ▲ |
| June | 62.1 | 4,796 ft | 77.3 | 5,741 ft ▲ |
| July | 70.2 | 5,304 ft | 87.2 | 6,339 ft ▲ |
| August | 68.3 | 5,185 ft | 86.3 | 6,285 ft ▲ |
| September | 58.4 | 4,560 ft | 75.3 | 5,618 ft ▲ |
| October | 45.7 | 3,737 ft | 59.7 | 4,643 ft |
| November | 34.0 | 2,955 ft | 45.8 | 3,743 ft |
| December | 25.1 | 2,345 ft | 35.9 | 3,083 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 6S1
DENSITY ALTITUDE caution
Field elevation 3,720 ft — the air behaves like 6,327 ft.
- PRESSURE ALT
- 3,722 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
- KRED — Red Lodge
Red Lodge · elev 5,762 ft
- 6S3 — Woltermann Meml
Columbus · elev 3,578 ft
- 6S8 — Laurel Municipal
Laurel · elev 3,543 ft
- KBIL — Billings Logan International
Billings · elev 3,662 ft
- 5U7 — Fort Smith Landing Strip
Fort Smith · elev 3,242 ft
- 6S0 — Big Timber At Howard Field
Big Timber · elev 4,494 ft
- 00U — Big Horn County
Hardin · elev 3,025 ft
- 80S — Lavina
Lavina · elev 3,512 ft
Frequently asked questions
How high does density altitude get at 6S1 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Bridger Municipal reaches roughly 6,339 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 6S1 on an average day?
It swings with the seasons: from roughly 2,282 ft at the coldest month's average temperature to about 5,304 ft at the warmest month's — all from a constant field elevation of 3,720 ft. The month-by-month table above carries the full year.
What is the field elevation of Bridger Municipal?
3,720 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 6S1 (FAA), in Bridger, Montana.