Winifred, Montana · field elev 3,300 ft
Density Altitude at Cow Creek (CW0)
From a field elevation of 3,300 ft, a typical July afternoon at Cow Creek (80 °F) raises density altitude to about 5,419 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 | 23.1 | 1,681 ft | 34.1 | 2,440 ft |
| February | 24.1 | 1,751 ft | 35.4 | 2,528 ft |
| March | 32.3 | 2,317 ft | 44.3 | 3,125 ft |
| April | 42.0 | 2,972 ft | 54.6 | 3,800 ft |
| May | 50.0 | 3,500 ft | 62.7 | 4,319 ft |
| June | 58.8 | 4,070 ft | 70.9 | 4,834 ft |
| July | 66.3 | 4,546 ft | 80.4 | 5,419 ft ▲ |
| August | 65.0 | 4,464 ft | 79.9 | 5,388 ft ▲ |
| September | 55.1 | 3,832 ft | 68.7 | 4,697 ft |
| October | 44.1 | 3,112 ft | 56.7 | 3,935 ft |
| November | 32.5 | 2,331 ft | 43.4 | 3,065 ft |
| December | 24.6 | 1,786 ft | 35.3 | 2,521 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 CW0
DENSITY ALTITUDE caution
Field elevation 3,300 ft — the air behaves like 5,394 ft.
- PRESSURE ALT
- 3,302 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
- LC0 — Left Coulee
Winifred · elev 3,150 ft
- BW8 — Bullwhacker
Winifred · elev 3,100 ft
- BB0 — Black Butte North
Winifred · elev 3,150 ft
- WH0 — Woodhawk
Winifred · elev 3,100 ft
- L51 — Heller Farm
Winifred · elev 2,304 ft
- MT3 — Knox Ridge
Winifred · elev 2,950 ft
- 9S7 — Winifred
Winifred · elev 3,354 ft
- 48S — Harlem
Harlem · elev 2,643 ft
Frequently asked questions
How high does density altitude get at CW0 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Cow Creek reaches roughly 5,419 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 CW0 on an average day?
It swings with the seasons: from roughly 1,681 ft at the coldest month's average temperature to about 4,546 ft at the warmest month's — all from a constant field elevation of 3,300 ft. The month-by-month table above carries the full year.
What is the field elevation of Cow Creek?
3,300 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is CW0 (FAA), in Winifred, Montana.