Winnett, Montana · field elev 2,989 ft
Density Altitude at Winnett (7S2)
From a field elevation of 2,989 ft, a typical July afternoon at Winnett (86 °F) raises density altitude to about 5,368 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 | 25.0 | 1,425 ft | 35.5 | 2,149 ft |
| February | 27.2 | 1,579 ft | 38.3 | 2,338 ft |
| March | 36.3 | 2,203 ft | 48.4 | 3,012 ft |
| April | 44.8 | 2,774 ft | 58.0 | 3,636 ft |
| May | 53.9 | 3,371 ft | 67.0 | 4,209 ft |
| June | 62.7 | 3,937 ft | 75.7 | 4,752 ft |
| July | 70.4 | 4,423 ft | 85.8 | 5,368 ft ▲ |
| August | 69.6 | 4,373 ft | 85.6 | 5,356 ft ▲ |
| September | 59.8 | 3,752 ft | 74.6 | 4,684 ft |
| October | 47.2 | 2,932 ft | 59.7 | 3,746 ft |
| November | 35.0 | 2,115 ft | 46.1 | 2,860 ft |
| December | 26.2 | 1,509 ft | 37.0 | 2,250 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 7S2
DENSITY ALTITUDE caution
Field elevation 2,989 ft — the air behaves like 5,380 ft.
- PRESSURE ALT
- 2,991 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
- KRPX — Roundup
Roundup · elev 3,490 ft
- 8U1 — Sand Springs Strip
Sand Springs · elev 3,180 ft
- MT3 — Knox Ridge
Winifred · elev 2,950 ft
- KLWT — Lewistown Municipal
Lewistown · elev 4,170 ft
- 80S — Lavina
Lavina · elev 3,512 ft
- L51 — Heller Farm
Winifred · elev 2,304 ft
- 9S7 — Winifred
Winifred · elev 3,354 ft
- 8U0 — Ryegate
Ryegate · elev 3,689 ft
Frequently asked questions
How high does density altitude get at 7S2 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Winnett reaches roughly 5,368 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 7S2 on an average day?
It swings with the seasons: from roughly 1,425 ft at the coldest month's average temperature to about 4,423 ft at the warmest month's — all from a constant field elevation of 2,989 ft. The month-by-month table above carries the full year.
What is the field elevation of Winnett?
2,989 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7S2 (FAA), in Winnett, Montana.