Stanford, Montana · field elev 4,328 ft
Density Altitude at Stanford/Biggerstaff Field (S64)
From a field elevation of 4,328 ft, a typical August afternoon at Stanford/Biggerstaff Field (82 °F) raises density altitude to about 6,753 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 | 24.9 | 3,089 ft | 36.9 | 3,904 ft |
| February | 25.5 | 3,130 ft | 37.6 | 3,951 ft |
| March | 32.7 | 3,622 ft | 45.3 | 4,461 ft |
| April | 40.6 | 4,151 ft | 53.3 | 4,980 ft |
| May | 49.8 | 4,754 ft | 62.4 | 5,559 ft ▲ |
| June | 57.7 | 5,262 ft | 70.7 | 6,077 ft ▲ |
| July | 66.0 | 5,785 ft | 81.7 | 6,747 ft ▲ |
| August | 65.8 | 5,772 ft | 81.8 | 6,753 ft ▲ |
| September | 56.2 | 5,166 ft | 70.9 | 6,089 ft ▲ |
| October | 44.0 | 4,376 ft | 57.4 | 5,243 ft ▲ |
| November | 32.9 | 3,635 ft | 45.0 | 4,441 ft |
| December | 25.3 | 3,116 ft | 37.1 | 3,918 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 S64
DENSITY ALTITUDE caution
Field elevation 4,328 ft — the air behaves like 6,765 ft.
- PRESSURE ALT
- 4,330 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
- 5U0 — Denton
Denton · elev 3,594 ft
- M42 — Russian Flat
Russian Flat · elev 6,336 ft
- 5U8 — Geraldine
Geraldine · elev 3,185 ft
- KLWT — Lewistown Municipal
Lewistown · elev 4,170 ft
- 9S7 — Winifred
Winifred · elev 3,354 ft
- KHWQ — Wheatland County At Harlowton
Harlowton · elev 4,312 ft
- 79S — Fort Benton
Fort Benton · elev 2,869 ft
- 7S6 — White Sulphur Springs
White Sulphur Springs · elev 5,065 ft
Frequently asked questions
How high does density altitude get at S64 in summer?
On a typical August afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Stanford/Biggerstaff Field reaches roughly 6,753 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 S64 on an average day?
It swings with the seasons: from roughly 3,089 ft at the coldest month's average temperature to about 5,785 ft at the warmest month's — all from a constant field elevation of 4,328 ft. The month-by-month table above carries the full year.
What is the field elevation of Stanford/Biggerstaff Field?
4,328 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S64 (FAA), in Stanford, Montana.