Winifred, Montana · field elev 3,354 ft
Density Altitude at Winifred (9S7)
From a field elevation of 3,354 ft, a typical July afternoon at Winifred (83 °F) raises density altitude to about 5,660 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 | 1,623 ft | 32.7 | 2,412 ft |
| February | 24.4 | 1,839 ft | 35.5 | 2,602 ft |
| March | 33.5 | 2,466 ft | 45.2 | 3,251 ft |
| April | 42.7 | 3,086 ft | 54.9 | 3,886 ft |
| May | 52.0 | 3,698 ft | 64.3 | 4,486 ft |
| June | 60.6 | 4,251 ft | 73.1 | 5,036 ft ▲ |
| July | 68.6 | 4,756 ft | 83.3 | 5,660 ft ▲ |
| August | 67.5 | 4,688 ft | 83.1 | 5,648 ft ▲ |
| September | 57.2 | 4,034 ft | 71.9 | 4,962 ft |
| October | 44.0 | 3,172 ft | 57.2 | 4,034 ft |
| November | 32.7 | 2,412 ft | 44.3 | 3,192 ft |
| December | 23.6 | 1,784 ft | 34.9 | 2,561 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 9S7
DENSITY ALTITUDE caution
Field elevation 3,354 ft — the air behaves like 5,642 ft.
- PRESSURE ALT
- 3,356 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- 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
- WH0 — Woodhawk
Winifred · elev 3,100 ft
- BB0 — Black Butte North
Winifred · elev 3,150 ft
- BW8 — Bullwhacker
Winifred · elev 3,100 ft
- MT3 — Knox Ridge
Winifred · elev 2,950 ft
- L51 — Heller Farm
Winifred · elev 2,304 ft
- LC0 — Left Coulee
Winifred · elev 3,150 ft
- 5U0 — Denton
Denton · elev 3,594 ft
- CW0 — Cow Creek
Winifred · elev 3,300 ft
Frequently asked questions
How high does density altitude get at 9S7 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Winifred reaches roughly 5,660 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 9S7 on an average day?
It swings with the seasons: from roughly 1,623 ft at the coldest month's average temperature to about 4,756 ft at the warmest month's — all from a constant field elevation of 3,354 ft. The month-by-month table above carries the full year.
What is the field elevation of Winifred?
3,354 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 9S7 (FAA), in Winifred, Montana.