Owyhee, Oregon · field elev 2,680 ft
Density Altitude at Owyhee Reservoir State (28U)
From a field elevation of 2,680 ft, a typical July afternoon at Owyhee Reservoir State (95 °F) raises density altitude to about 5,531 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 | 30.5 | 1,422 ft | 39.8 | 2,056 ft |
| February | 35.7 | 1,778 ft | 47.3 | 2,557 ft |
| March | 43.5 | 2,304 ft | 57.4 | 3,218 ft |
| April | 49.6 | 2,709 ft | 64.7 | 3,685 ft |
| May | 58.4 | 3,282 ft | 74.6 | 4,307 ft |
| June | 65.5 | 3,736 ft | 83.5 | 4,853 ft |
| July | 74.7 | 4,313 ft | 94.8 | 5,531 ft ▲ |
| August | 73.2 | 4,220 ft | 93.2 | 5,436 ft ▲ |
| September | 63.8 | 3,628 ft | 82.5 | 4,792 ft |
| October | 51.5 | 2,834 ft | 67.5 | 3,862 ft |
| November | 38.3 | 1,955 ft | 50.4 | 2,762 ft |
| December | 30.8 | 1,442 ft | 40.4 | 2,097 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 28U
DENSITY ALTITUDE caution
Field elevation 2,680 ft — the air behaves like 5,543 ft.
- PRESSURE ALT
- 2,682 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 Oregon fields
- S49 — Miller Meml Airpark
Vale · elev 2,249 ft
- KONO — Ontario Municipal
Ontario · elev 2,193 ft
- KREO — Rome State
Rome · elev 4,053 ft
- KBNO — Burns Municipal
Burns · elev 4,148 ft
- 26U — Mc Dermitt State
Mc Dermitt · elev 4,478 ft
- KBKE — Baker City Municipal
Baker City · elev 3,373 ft
- KGCD — Grant County Regional/Ogilvie Field
John Day · elev 3,703 ft
- KLGD — La Grande/Union County
La Grande · elev 2,718 ft
Frequently asked questions
How high does density altitude get at 28U in summer?
On a typical July afternoon — around 95 °F at the nearest NOAA normals station — density altitude at Owyhee Reservoir State reaches roughly 5,531 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 28U on an average day?
It swings with the seasons: from roughly 1,422 ft at the coldest month's average temperature to about 4,313 ft at the warmest month's — all from a constant field elevation of 2,680 ft. The month-by-month table above carries the full year.
What is the field elevation of Owyhee Reservoir State?
2,680 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 28U (FAA), in Owyhee, Oregon.