Winifred, Montana · field elev 3,100 ft
Density Altitude at Bullwhacker (BW8)
From a field elevation of 3,100 ft, a typical July afternoon at Bullwhacker (83 °F) raises density altitude to about 5,352 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 | 21.3 | 1,305 ft | 32.7 | 2,096 ft |
| February | 24.4 | 1,522 ft | 35.5 | 2,287 ft |
| March | 33.5 | 2,150 ft | 45.2 | 2,937 ft |
| April | 42.7 | 2,771 ft | 54.9 | 3,573 ft |
| May | 52.0 | 3,384 ft | 64.3 | 4,175 ft |
| June | 60.6 | 3,940 ft | 73.1 | 4,726 ft |
| July | 68.6 | 4,446 ft | 83.3 | 5,352 ft ▲ |
| August | 67.5 | 4,377 ft | 83.1 | 5,340 ft ▲ |
| September | 57.2 | 3,721 ft | 71.9 | 4,652 ft |
| October | 44.0 | 2,858 ft | 57.2 | 3,721 ft |
| November | 32.7 | 2,096 ft | 44.3 | 2,878 ft |
| December | 23.6 | 1,466 ft | 34.9 | 2,246 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 BW8
DENSITY ALTITUDE caution
Field elevation 3,100 ft — the air behaves like 5,334 ft.
- PRESSURE ALT
- 3,102 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
- BB0 — Black Butte North
Winifred · elev 3,150 ft
- LC0 — Left Coulee
Winifred · elev 3,150 ft
- WH0 — Woodhawk
Winifred · elev 3,100 ft
- CW0 — Cow Creek
Winifred · elev 3,300 ft
- L51 — Heller Farm
Winifred · elev 2,304 ft
- MT3 — Knox Ridge
Winifred · elev 2,950 ft
- 9S7 — Winifred
Winifred · elev 3,354 ft
- 3U8 — Big Sandy
Big Sandy · elev 2,699 ft
Frequently asked questions
How high does density altitude get at BW8 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Bullwhacker reaches roughly 5,352 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 BW8 on an average day?
It swings with the seasons: from roughly 1,305 ft at the coldest month's average temperature to about 4,446 ft at the warmest month's — all from a constant field elevation of 3,100 ft. The month-by-month table above carries the full year.
What is the field elevation of Bullwhacker?
3,100 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is BW8 (FAA), in Winifred, Montana.