Valier, Montana · field elev 3,826 ft
Density Altitude at Valier (7S7)
From a field elevation of 3,826 ft, a typical July afternoon at Valier (82 °F) raises density altitude to about 6,125 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 | 24.0 | 2,401 ft | 35.1 | 3,161 ft |
| February | 25.8 | 2,525 ft | 37.3 | 3,309 ft |
| March | 33.3 | 3,039 ft | 45.5 | 3,854 ft |
| April | 42.6 | 3,663 ft | 55.1 | 4,479 ft |
| May | 51.7 | 4,259 ft | 64.4 | 5,071 ft ▲ |
| June | 59.1 | 4,735 ft | 71.4 | 5,507 ft ▲ |
| July | 66.8 | 5,221 ft | 81.5 | 6,125 ft ▲ |
| August | 66.0 | 5,171 ft | 81.2 | 6,107 ft ▲ |
| September | 57.3 | 4,620 ft | 71.6 | 5,520 ft ▲ |
| October | 44.9 | 3,815 ft | 57.1 | 4,607 ft |
| November | 32.9 | 3,012 ft | 43.1 | 3,696 ft |
| December | 25.0 | 2,470 ft | 34.9 | 3,147 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 7S7
DENSITY ALTITUDE caution
Field elevation 3,826 ft — the air behaves like 6,155 ft.
- PRESSURE ALT
- 3,828 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
- S01 — Conrad
Conrad · elev 3,548 ft
- KCTB — Cut Bank International
Cut Bank · elev 3,858 ft
- KSBX — Shelby
Shelby · elev 3,443 ft
- KCII — Choteau
Choteau · elev 3,947 ft
- 5U1 — Dutton
Dutton · elev 3,699 ft
- 8S0 — Starr-Browning Airstrip
Browning · elev 4,657 ft
- 5U5 — Fairfield
Fairfield · elev 3,991 ft
- 8U2 — Schafer /Usfs/
Schafer · elev 4,856 ft
Frequently asked questions
How high does density altitude get at 7S7 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Valier reaches roughly 6,125 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 7S7 on an average day?
It swings with the seasons: from roughly 2,401 ft at the coldest month's average temperature to about 5,221 ft at the warmest month's — all from a constant field elevation of 3,826 ft. The month-by-month table above carries the full year.
What is the field elevation of Valier?
3,826 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 7S7 (FAA), in Valier, Montana.