Sunriver, Oregon · field elev 4,164 ft
Density Altitude at Sunriver (S21)
From a field elevation of 4,164 ft, a typical July afternoon at Sunriver (84 °F) raises density altitude to about 6,692 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 | 29.7 | 3,214 ft | 39.8 | 3,895 ft |
| February | 32.1 | 3,377 ft | 43.1 | 4,114 ft |
| March | 37.0 | 3,708 ft | 49.7 | 4,546 ft |
| April | 40.6 | 3,948 ft | 56.6 | 4,990 ft |
| May | 48.8 | 4,487 ft | 64.7 | 5,503 ft ▲ |
| June | 54.6 | 4,862 ft | 72.0 | 5,957 ft ▲ |
| July | 62.5 | 5,365 ft | 84.1 | 6,692 ft ▲ |
| August | 61.6 | 5,308 ft | 83.1 | 6,632 ft ▲ |
| September | 54.9 | 4,882 ft | 75.8 | 6,190 ft ▲ |
| October | 44.9 | 4,232 ft | 61.9 | 5,327 ft ▲ |
| November | 35.1 | 3,580 ft | 46.3 | 4,324 ft |
| December | 28.3 | 3,118 ft | 37.5 | 3,741 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 S21
DENSITY ALTITUDE caution
Field elevation 4,164 ft — the air behaves like 6,686 ft.
- PRESSURE ALT
- 4,166 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
- KBDN — Bend Municipal
Bend · elev 3,459 ft
- 6K5 — Sisters Eagle Air
Sisters · elev 3,168 ft
- KRDM — Roberts Field/Redmond Municipal
Redmond · elev 3,082 ft
- 5S2 — Crescent Lake State
Crescent Lake · elev 4,820 ft
- 00S — Mc Kenzie Bridge State
Mc Kenzie Bridge · elev 1,620 ft
- S39 — Prineville
Prineville · elev 3,251 ft
- 5S5 — Lake Billy Chinook
Culver · elev 2,695 ft
- 8S3 — Santiam Junction State
Santiam Junction · elev 3,780 ft
Frequently asked questions
How high does density altitude get at S21 in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Sunriver reaches roughly 6,692 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 S21 on an average day?
It swings with the seasons: from roughly 3,118 ft at the coldest month's average temperature to about 5,365 ft at the warmest month's — all from a constant field elevation of 4,164 ft. The month-by-month table above carries the full year.
What is the field elevation of Sunriver?
4,164 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S21 (FAA), in Sunriver, Oregon.