Prairie, Idaho · field elev 4,958 ft
Density Altitude at Smith Prairie (2U0)
From a field elevation of 4,958 ft, a typical July afternoon at Smith Prairie (85 °F) raises density altitude to about 7,720 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 | 19.1 | 3,472 ft | 29.0 | 4,153 ft |
| February | 21.8 | 3,660 ft | 31.8 | 4,343 ft |
| March | 31.4 | 4,316 ft | 42.1 | 5,028 ft ▲ |
| April | 41.5 | 4,989 ft | 54.3 | 5,818 ft ▲ |
| May | 50.0 | 5,543 ft | 64.9 | 6,486 ft ▲ |
| June | 57.4 | 6,016 ft | 74.5 | 7,077 ft ▲ |
| July | 66.0 | 6,555 ft | 85.2 | 7,720 ft ▲ |
| August | 64.9 | 6,486 ft | 85.1 | 7,714 ft ▲ |
| September | 56.3 | 5,946 ft | 75.7 | 7,150 ft ▲ |
| October | 44.4 | 5,179 ft | 60.6 | 6,217 ft ▲ |
| November | 31.4 | 4,316 ft | 43.1 | 5,094 ft ▲ |
| December | 20.5 | 3,570 ft | 30.4 | 4,248 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 2U0
DENSITY ALTITUDE caution
Field elevation 4,958 ft — the air behaves like 7,708 ft.
- PRESSURE ALT
- 4,960 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
- 1U9 — Pine
Pine · elev 4,232 ft
- 52U — Weatherby Usfs
Atlanta · elev 4,503 ft
- U76 — Mountain Home Municipal
Mountain Home · elev 3,167 ft
- U98 — Idaho City Usfs
Idaho City · elev 3,920 ft
- 55H — Atlanta
Atlanta · elev 5,500 ft
- KBOI — Boise Air Trml/Gowen Field
Boise · elev 2,872 ft
- U45 — Graham Usfs
Atlanta · elev 5,726 ft
- U86 — Fairfield/Frostenson Airfield
Fairfield · elev 5,058 ft
Frequently asked questions
How high does density altitude get at 2U0 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Smith Prairie reaches roughly 7,720 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 2U0 on an average day?
It swings with the seasons: from roughly 3,472 ft at the coldest month's average temperature to about 6,555 ft at the warmest month's — all from a constant field elevation of 4,958 ft. The month-by-month table above carries the full year.
What is the field elevation of Smith Prairie?
4,958 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 2U0 (FAA), in Prairie, Idaho.