Silver Lake, Oregon · field elev 4,492 ft
Density Altitude at Silver Lake F S Strip (45S)
From a field elevation of 4,492 ft, a typical July afternoon at Silver Lake F S Strip (85 °F) raises density altitude to about 7,167 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 | 30.1 | 3,649 ft | 40.4 | 4,340 ft |
| February | 33.2 | 3,859 ft | 44.5 | 4,611 ft |
| March | 37.3 | 4,134 ft | 50.5 | 5,002 ft ▲ |
| April | 41.9 | 4,440 ft | 56.1 | 5,361 ft ▲ |
| May | 50.0 | 4,969 ft | 65.8 | 5,973 ft ▲ |
| June | 56.7 | 5,399 ft | 74.0 | 6,479 ft ▲ |
| July | 65.4 | 5,948 ft | 85.4 | 7,167 ft ▲ |
| August | 63.5 | 5,829 ft | 84.3 | 7,102 ft ▲ |
| September | 55.8 | 5,342 ft | 76.1 | 6,607 ft ▲ |
| October | 45.7 | 4,689 ft | 62.5 | 5,766 ft ▲ |
| November | 35.4 | 4,007 ft | 47.6 | 4,813 ft |
| December | 28.2 | 3,520 ft | 37.7 | 4,161 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 45S
DENSITY ALTITUDE caution
Field elevation 4,492 ft — the air behaves like 7,144 ft.
- PRESSURE ALT
- 4,494 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
- 62S — Christmas Valley
Christmas Valley · elev 4,320 ft
- 2S2 — Beaver Marsh
Beaver Marsh · elev 4,638 ft
- 22S — Paisley
Paisley · elev 4,395 ft
- 5S2 — Crescent Lake State
Crescent Lake · elev 4,820 ft
- 2S7 — Chiloquin State
Chiloquin · elev 4,221 ft
- S21 — Sunriver
Sunriver · elev 4,164 ft
- R03 — Alkali Lake State
Alkali Lake · elev 4,312 ft
- 3S6 — Toketee State
Clearwater · elev 3,361 ft
Frequently asked questions
How high does density altitude get at 45S in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Silver Lake F S Strip reaches roughly 7,167 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 45S on an average day?
It swings with the seasons: from roughly 3,520 ft at the coldest month's average temperature to about 5,948 ft at the warmest month's — all from a constant field elevation of 4,492 ft. The month-by-month table above carries the full year.
What is the field elevation of Silver Lake F S Strip?
4,492 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 45S (FAA), in Silver Lake, Oregon.