Prineville, Oregon · field elev 3,251 ft
Density Altitude at Prineville (S39)
From a field elevation of 3,251 ft, a typical July afternoon at Prineville (87 °F) raises density altitude to about 5,752 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 | 34.1 | 2,379 ft | 43.2 | 2,991 ft |
| February | 37.0 | 2,576 ft | 47.6 | 3,283 ft |
| March | 41.9 | 2,905 ft | 54.7 | 3,746 ft |
| April | 46.7 | 3,223 ft | 60.2 | 4,099 ft |
| May | 54.5 | 3,733 ft | 68.9 | 4,649 ft |
| June | 60.5 | 4,119 ft | 76.4 | 5,114 ft ▲ |
| July | 68.0 | 4,593 ft | 86.9 | 5,752 ft ▲ |
| August | 67.1 | 4,536 ft | 86.4 | 5,722 ft ▲ |
| September | 60.5 | 4,119 ft | 79.0 | 5,274 ft ▲ |
| October | 49.7 | 3,420 ft | 65.1 | 4,410 ft |
| November | 40.0 | 2,778 ft | 51.3 | 3,525 ft |
| December | 32.9 | 2,297 ft | 41.9 | 2,905 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 S39
DENSITY ALTITUDE caution
Field elevation 3,251 ft — the air behaves like 5,758 ft.
- PRESSURE ALT
- 3,253 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
- KRDM — Roberts Field/Redmond Municipal
Redmond · elev 3,082 ft
- KBDN — Bend Municipal
Bend · elev 3,459 ft
- 5S5 — Lake Billy Chinook
Culver · elev 2,695 ft
- S33 — Madras Municipal
Madras · elev 2,438 ft
- 6K5 — Sisters Eagle Air
Sisters · elev 3,168 ft
- S21 — Sunriver
Sunriver · elev 4,164 ft
- 8S3 — Santiam Junction State
Santiam Junction · elev 3,780 ft
- 00S — Mc Kenzie Bridge State
Mc Kenzie Bridge · elev 1,620 ft
Frequently asked questions
How high does density altitude get at S39 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Prineville reaches roughly 5,752 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 S39 on an average day?
It swings with the seasons: from roughly 2,297 ft at the coldest month's average temperature to about 4,593 ft at the warmest month's — all from a constant field elevation of 3,251 ft. The month-by-month table above carries the full year.
What is the field elevation of Prineville?
3,251 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S39 (FAA), in Prineville, Oregon.