Alpine, Wyoming · field elev 5,637 ft
Density Altitude at Alpine (46U)
Alpine is a genuine high-and-hot field: from 5,637 ft of elevation, a typical July afternoon (85 °F) pushes density altitude to about 8,524 ft — the airplane performs like it is 2,887 ft above the field before the wheels roll.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 20.7 | 4,430 ft | 30.4 | 5,091 ft ▲ |
| February | 24.2 | 4,670 ft | 34.7 | 5,378 ft ▲ |
| March | 33.3 | 5,285 ft | 45.0 | 6,055 ft ▲ |
| April | 41.6 | 5,834 ft | 56.1 | 6,765 ft ▲ |
| May | 50.3 | 6,397 ft | 65.9 | 7,377 ft ▲ |
| June | 57.8 | 6,873 ft | 74.9 | 7,927 ft ▲ |
| July | 65.3 | 7,340 ft | 84.9 | 8,524 ft ⚠ |
| August | 64.2 | 7,272 ft | 84.2 | 8,483 ft ⚠ |
| September | 55.9 | 6,753 ft | 74.5 | 7,902 ft ▲ |
| October | 43.9 | 5,984 ft | 59.3 | 6,967 ft ▲ |
| November | 31.6 | 5,171 ft | 43.0 | 5,925 ft ▲ |
| December | 22.0 | 4,520 ft | 31.6 | 5,171 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 46U
DENSITY ALTITUDE high DA
Field elevation 5,637 ft — the air behaves like 8,530 ft.
- PRESSURE ALT
- 5,639 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 Wyoming fields
- KAFO — Afton Lincoln County/General Boyd L Eddins Field
Afton · elev 6,221 ft
- KJAC — Jackson Hole
Jackson · elev 6,451 ft
- KBPI — Miley Meml Field
Big Piney · elev 6,994 ft
- KPNA — Ralph Wenz Field
Pinedale · elev 7,096 ft
- KDUB — Dubois Municipal
Dubois · elev 7,299 ft
- U06 — Cokeville Municipal
Cokeville · elev 6,270 ft
- KEMM — Kemmerer Municipal
Kemmerer · elev 7,289 ft
- KLND — Hunt Field
Lander · elev 5,589 ft
Frequently asked questions
How high does density altitude get at 46U in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Alpine reaches roughly 8,524 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 46U on an average day?
It swings with the seasons: from roughly 4,430 ft at the coldest month's average temperature to about 7,340 ft at the warmest month's — all from a constant field elevation of 5,637 ft. The month-by-month table above carries the full year.
What is the field elevation of Alpine?
5,637 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 46U (FAA), in Alpine, Wyoming.