Atlanta, Idaho · field elev 5,500 ft
Density Altitude at Atlanta (55H)
Atlanta is a genuine high-and-hot field: from 5,500 ft of elevation, a typical July afternoon (85 °F) pushes density altitude to about 8,376 ft — the airplane performs like it is 2,876 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 | 19.1 | 4,149 ft | 29.0 | 4,826 ft |
| February | 21.8 | 4,335 ft | 31.8 | 5,015 ft ▲ |
| March | 31.4 | 4,988 ft | 42.1 | 5,697 ft ▲ |
| April | 41.5 | 5,658 ft | 54.3 | 6,484 ft ▲ |
| May | 50.0 | 6,209 ft | 64.9 | 7,148 ft ▲ |
| June | 57.4 | 6,680 ft | 74.5 | 7,736 ft ▲ |
| July | 66.0 | 7,216 ft | 85.2 | 8,376 ft ⚠ |
| August | 64.9 | 7,148 ft | 85.1 | 8,370 ft ⚠ |
| September | 56.3 | 6,610 ft | 75.7 | 7,809 ft ▲ |
| October | 44.4 | 5,847 ft | 60.6 | 6,881 ft ▲ |
| November | 31.4 | 4,988 ft | 43.1 | 5,763 ft ▲ |
| December | 20.5 | 4,246 ft | 30.4 | 4,921 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 55H
DENSITY ALTITUDE high DA
Field elevation 5,500 ft — the air behaves like 8,364 ft.
- PRESSURE ALT
- 5,502 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
- 52U — Weatherby Usfs
Atlanta · elev 4,503 ft
- U45 — Graham Usfs
Atlanta · elev 5,726 ft
- U87 — Smiley Creek
Smiley Creek · elev 7,206 ft
- 0U1 — Warm Springs Creek
Lowman · elev 4,831 ft
- 1U9 — Pine
Pine · elev 4,232 ft
- 2U7 — Stanley
Stanley · elev 6,403 ft
- 2U0 — Smith Prairie
Prairie · elev 4,958 ft
- U98 — Idaho City Usfs
Idaho City · elev 3,920 ft
Frequently asked questions
How high does density altitude get at 55H in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Atlanta reaches roughly 8,376 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 55H on an average day?
It swings with the seasons: from roughly 4,149 ft at the coldest month's average temperature to about 7,216 ft at the warmest month's — all from a constant field elevation of 5,500 ft. The month-by-month table above carries the full year.
What is the field elevation of Atlanta?
5,500 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 55H (FAA), in Atlanta, Idaho.