Prospect, Oregon · field elev 2,578 ft
Density Altitude at Prospect State (64S)
From a field elevation of 2,578 ft, a typical August afternoon at Prospect State (89 °F) raises density altitude to about 5,080 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 | 40.1 | 1,950 ft | 50.0 | 2,609 ft |
| February | 42.2 | 2,091 ft | 53.6 | 2,845 ft |
| March | 45.2 | 2,292 ft | 57.9 | 3,124 ft |
| April | 48.7 | 2,524 ft | 62.4 | 3,414 ft |
| May | 55.9 | 2,995 ft | 71.0 | 3,958 ft |
| June | 61.5 | 3,356 ft | 77.9 | 4,386 ft |
| July | 69.5 | 3,863 ft | 88.7 | 5,044 ft ▲ |
| August | 69.3 | 3,851 ft | 89.3 | 5,080 ft ▲ |
| September | 63.6 | 3,490 ft | 83.5 | 4,729 ft |
| October | 54.0 | 2,871 ft | 70.4 | 3,920 ft |
| November | 44.1 | 2,218 ft | 54.7 | 2,917 ft |
| December | 38.8 | 1,862 ft | 47.6 | 2,451 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 64S
DENSITY ALTITUDE caution
Field elevation 2,578 ft — the air behaves like 5,062 ft.
- PRESSURE ALT
- 2,580 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
- KMFR — Rogue Valley International/Medford
Medford · elev 1,335 ft
- 2S7 — Chiloquin State
Chiloquin · elev 4,221 ft
- 3S6 — Toketee State
Clearwater · elev 3,361 ft
- S03 — Ashland Municipal/Sumner Parker Field
Ashland · elev 1,889 ft
- 2S2 — Beaver Marsh
Beaver Marsh · elev 4,638 ft
- 24S — Pinehurst State
Pinehurst · elev 3,643 ft
- 16S — Myrtle Creek Municipal
Myrtle Creek · elev 619 ft
- 3S8 — Grants Pass
Grants Pass · elev 1,130 ft
Frequently asked questions
How high does density altitude get at 64S in summer?
On a typical August afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Prospect State reaches roughly 5,080 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 64S on an average day?
It swings with the seasons: from roughly 1,862 ft at the coldest month's average temperature to about 3,863 ft at the warmest month's — all from a constant field elevation of 2,578 ft. The month-by-month table above carries the full year.
What is the field elevation of Prospect State?
2,578 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 64S (FAA), in Prospect, Oregon.