Sunnyside, Washington · field elev 768 ft
Density Altitude at Sunnyside Municipal (1S5)
Sunnyside Municipal sits at 768 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,813 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 | 30.3 | −979 ft | 37.6 | −471 ft |
| February | 34.9 | −658 ft | 45.4 | 62 ft |
| March | 42.5 | −135 ft | 55.4 | 730 ft |
| April | 49.4 | 331 ft | 63.3 | 1,246 ft |
| May | 58.2 | 914 ft | 72.8 | 1,854 ft |
| June | 64.2 | 1,304 ft | 79.2 | 2,257 ft |
| July | 71.3 | 1,759 ft | 88.2 | 2,813 ft |
| August | 69.4 | 1,638 ft | 86.5 | 2,709 ft |
| September | 61.1 | 1,103 ft | 77.7 | 2,163 ft |
| October | 49.4 | 331 ft | 63.6 | 1,265 ft |
| November | 37.8 | −457 ft | 48.3 | 257 ft |
| December | 29.7 | −1,021 ft | 37.1 | −505 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 1S5
DENSITY ALTITUDE
Field elevation 768 ft — the air behaves like 2,801 ft.
- PRESSURE ALT
- 769 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 Washington fields
- S40 — Prosser
Prosser · elev 706 ft
- M94 — Desert Aire Regional
Mattawa · elev 586 ft
- KRLD — Richland
Richland · elev 394 ft
- KYKM — Yakima Air Trml/Mcallister Field
Yakima · elev 1,099 ft
- KPSC — Tri-Cities
Pasco · elev 410 ft
- S70 — Othello Municipal
Othello · elev 1,149 ft
- S20 — Goldendale
Goldendale · elev 1,678 ft
- KELN — Bowers Field
Ellensburg · elev 1,763 ft
Frequently asked questions
How high does density altitude get at 1S5 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Sunnyside Municipal reaches roughly 2,813 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 1S5 on an average day?
It swings with the seasons: from roughly −1,021 ft at the coldest month's average temperature to about 1,759 ft at the warmest month's — all from a constant field elevation of 768 ft. The month-by-month table above carries the full year.
What is the field elevation of Sunnyside Municipal?
768 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1S5 (FAA), in Sunnyside, Washington.