Stanley, Idaho · field elev 4,415 ft
Density Altitude at Thomas Creek (2U8)
From a field elevation of 4,415 ft, a typical July afternoon at Thomas Creek (86 °F) raises density altitude to about 7,092 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 | 25.0 | 3,204 ft | 34.1 | 3,824 ft |
| February | 29.2 | 3,492 ft | 40.4 | 4,245 ft |
| March | 37.4 | 4,046 ft | 49.8 | 4,862 ft |
| April | 44.0 | 4,483 ft | 57.3 | 5,343 ft ▲ |
| May | 52.4 | 5,029 ft | 66.6 | 5,929 ft ▲ |
| June | 59.5 | 5,483 ft | 75.0 | 6,447 ft ▲ |
| July | 67.1 | 5,960 ft | 85.7 | 7,092 ft ▲ |
| August | 65.6 | 5,866 ft | 85.0 | 7,050 ft ▲ |
| September | 57.5 | 5,356 ft | 75.9 | 6,501 ft ▲ |
| October | 45.8 | 4,601 ft | 60.7 | 5,559 ft ▲ |
| November | 33.1 | 3,757 ft | 43.0 | 4,417 ft |
| December | 24.2 | 3,149 ft | 33.3 | 3,770 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 2U8
DENSITY ALTITUDE caution
Field elevation 4,415 ft — the air behaves like 7,110 ft.
- PRESSURE ALT
- 4,417 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
- ID8 — Marble Creek
Challis · elev 4,685 ft
- 0U3 — Mahoney Creek Usfs
Mahoney Creek · elev 4,618 ft
- D47 — Cougar Ranch
Challis · elev 4,277 ft
- S81 — Indian Creek Usfs
Indian Creek · elev 4,718 ft
- C53 — Lower Loon Creek
Challis · elev 4,200 ft
- U72 — Upper Loon Creek Usfs
Challis · elev 5,500 ft
- U54 — Bernard Usfs
Bernard · elev 3,626 ft
- U63 — Bruce Meadows
Stanley · elev 6,370 ft
Frequently asked questions
How high does density altitude get at 2U8 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Thomas Creek reaches roughly 7,092 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 2U8 on an average day?
It swings with the seasons: from roughly 3,149 ft at the coldest month's average temperature to about 5,960 ft at the warmest month's — all from a constant field elevation of 4,415 ft. The month-by-month table above carries the full year.
What is the field elevation of Thomas Creek?
4,415 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 2U8 (FAA), in Stanley, Idaho.