American Falls, Idaho · field elev 4,420 ft
Density Altitude at Savage Field (U01)
From a field elevation of 4,420 ft, a typical July afternoon at Savage Field (90 °F) raises density altitude to about 7,377 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 | 26.6 | 3,320 ft | 34.5 | 3,857 ft |
| February | 30.0 | 3,553 ft | 39.1 | 4,165 ft |
| March | 40.5 | 4,258 ft | 51.8 | 4,997 ft |
| April | 47.5 | 4,718 ft | 60.0 | 5,521 ft ▲ |
| May | 56.9 | 5,324 ft | 71.3 | 6,226 ft ▲ |
| June | 64.4 | 5,797 ft | 79.1 | 6,702 ft ▲ |
| July | 73.4 | 6,355 ft | 90.4 | 7,377 ft ▲ |
| August | 71.2 | 6,220 ft | 87.7 | 7,217 ft ▲ |
| September | 61.5 | 5,615 ft | 76.9 | 6,568 ft ▲ |
| October | 48.8 | 4,803 ft | 61.4 | 5,609 ft ▲ |
| November | 36.6 | 3,998 ft | 46.5 | 4,653 ft |
| December | 27.2 | 3,362 ft | 34.5 | 3,857 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 U01
DENSITY ALTITUDE caution
Field elevation 4,420 ft — the air behaves like 7,353 ft.
- PRESSURE ALT
- 4,422 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 Idaho fields
- U36 — Aberdeen Municipal
Aberdeen · elev 4,474 ft
- KPIH — Pocatello Regional
Pocatello · elev 4,452 ft
- 1U0 — Bear Trap
Minidoka · elev 4,716 ft
- 2U4 — Rockford Municipal
Rockford · elev 4,465 ft
- U48 — Coxs Well
Atomic City · elev 5,048 ft
- U02 — Mccarley Field
Blackfoot · elev 4,492 ft
- U58 — Downey/Hyde Meml/
Downey · elev 4,919 ft
- U37 — Midway
Atomic City · elev 5,017 ft
Frequently asked questions
How high does density altitude get at U01 in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Savage Field reaches roughly 7,377 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 U01 on an average day?
It swings with the seasons: from roughly 3,320 ft at the coldest month's average temperature to about 6,355 ft at the warmest month's — all from a constant field elevation of 4,420 ft. The month-by-month table above carries the full year.
What is the field elevation of Savage Field?
4,420 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is U01 (FAA), in American Falls, Idaho.