Lexington, Oregon · field elev 1,635 ft
Density Altitude at Lexington (9S9)
Lexington sits at 1,635 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 3,783 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 35.6 | 471 ft | 43.6 | 1,016 ft |
| February | 38.3 | 656 ft | 47.4 | 1,271 ft |
| March | 44.2 | 1,056 ft | 54.7 | 1,754 ft |
| April | 49.3 | 1,397 ft | 60.8 | 2,151 ft |
| May | 56.9 | 1,898 ft | 69.4 | 2,702 ft |
| June | 63.1 | 2,300 ft | 76.6 | 3,154 ft |
| July | 71.0 | 2,803 ft | 86.8 | 3,783 ft |
| August | 70.4 | 2,765 ft | 86.1 | 3,740 ft |
| September | 62.8 | 2,280 ft | 77.3 | 3,198 ft |
| October | 51.7 | 1,557 ft | 63.8 | 2,345 ft |
| November | 41.6 | 881 ft | 51.0 | 1,510 ft |
| December | 34.9 | 423 ft | 42.5 | 942 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 9S9
DENSITY ALTITUDE
Field elevation 1,635 ft — the air behaves like 3,795 ft.
- PRESSURE ALT
- 1,636 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
- M50 — Boardman
Boardman · elev 396 ft
- 3S9 — Condon State Pauling Field
Condon · elev 2,911 ft
- 1S8 — Arlington Municipal
Arlington · elev 890 ft
- KHRI — Hermiston Municipal
Hermiston · elev 644 ft
- KPDT — Eastern Oregon Regional At Pendleton
Pendleton · elev 1,494 ft
- 12S — Monument Municipal
Monument · elev 2,323 ft
- 35S — Wasco State
Wasco · elev 1,503 ft
- KDLS — Columbia Gorge Regional/The Dalles Municipal
The Dalles · elev 247 ft
Frequently asked questions
How high does density altitude get at 9S9 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Lexington reaches roughly 3,783 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 9S9 on an average day?
It swings with the seasons: from roughly 423 ft at the coldest month's average temperature to about 2,803 ft at the warmest month's — all from a constant field elevation of 1,635 ft. The month-by-month table above carries the full year.
What is the field elevation of Lexington?
1,635 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 9S9 (FAA), in Lexington, Oregon.