La Grande, Oregon · field elev 2,718 ft
Density Altitude at La Grande/Union County (KLGD)
From a field elevation of 2,718 ft, a typical August afternoon at La Grande/Union County (87 °F) raises density altitude to about 5,111 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 | 31.9 | 1,565 ft | 39.3 | 2,070 ft |
| February | 35.4 | 1,805 ft | 44.0 | 2,385 ft |
| March | 41.1 | 2,191 ft | 51.6 | 2,887 ft |
| April | 47.0 | 2,584 ft | 58.7 | 3,348 ft |
| May | 55.2 | 3,122 ft | 67.8 | 3,928 ft |
| June | 61.8 | 3,547 ft | 74.9 | 4,372 ft |
| July | 70.3 | 4,085 ft | 86.2 | 5,063 ft ▲ |
| August | 69.9 | 4,060 ft | 87.0 | 5,111 ft ▲ |
| September | 61.0 | 3,496 ft | 77.3 | 4,520 ft |
| October | 49.0 | 2,716 ft | 62.4 | 3,585 ft |
| November | 38.8 | 2,036 ft | 47.7 | 2,631 ft |
| December | 31.5 | 1,538 ft | 38.7 | 2,029 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 KLGD
DENSITY ALTITUDE caution
Field elevation 2,718 ft — the air behaves like 5,111 ft.
- PRESSURE ALT
- 2,720 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
- 68D — Reds Horse Ranch Usfs
Enterprise · elev 3,613 ft
- KBKE — Baker City Municipal
Baker City · elev 3,373 ft
- KJSY — Joseph State
Joseph · elev 4,126 ft
- 8S4 — Enterprise Municipal
Enterprise · elev 3,957 ft
- KPDT — Eastern Oregon Regional At Pendleton
Pendleton · elev 1,494 ft
- O62 — B & H Usfs
Enterprise · elev 4,007 ft
- 25U — Memaloose Usfs
Imnaha · elev 6,708 ft
- O68 — Sluice Creek
Imnaha · elev 1,370 ft
Frequently asked questions
How high does density altitude get at KLGD in summer?
On a typical August afternoon — around 87 °F at the nearest NOAA normals station — density altitude at La Grande/Union County reaches roughly 5,111 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 KLGD on an average day?
It swings with the seasons: from roughly 1,538 ft at the coldest month's average temperature to about 4,085 ft at the warmest month's — all from a constant field elevation of 2,718 ft. The month-by-month table above carries the full year.
What is the field elevation of La Grande/Union County?
2,718 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLGD (ICAO) / LGD (FAA), in La Grande, Oregon.