Rimrock, Washington · field elev 2,964 ft
Density Altitude at Tieton State (4S6)
Tieton State sits at 2,964 ft, and even a typical August afternoon (76 °F) only lifts density altitude to about 4,715 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 | 31.6 | 1,851 ft | 37.2 | 2,233 ft |
| February | 33.0 | 1,947 ft | 40.2 | 2,435 ft |
| March | 36.2 | 2,165 ft | 44.6 | 2,729 ft |
| April | 40.6 | 2,462 ft | 50.5 | 3,119 ft |
| May | 48.4 | 2,981 ft | 59.9 | 3,728 ft |
| June | 53.7 | 3,328 ft | 65.9 | 4,109 ft |
| July | 60.8 | 3,785 ft | 75.3 | 4,697 ft |
| August | 60.9 | 3,792 ft | 75.6 | 4,715 ft |
| September | 55.1 | 3,418 ft | 68.6 | 4,279 ft |
| October | 44.8 | 2,743 ft | 54.5 | 3,380 ft |
| November | 35.9 | 2,145 ft | 42.5 | 2,589 ft |
| December | 30.8 | 1,796 ft | 36.4 | 2,179 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 4S6
DENSITY ALTITUDE
Field elevation 2,964 ft — the air behaves like 4,740 ft.
- PRESSURE ALT
- 2,966 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
- 55S — Packwood
Packwood · elev 1,057 ft
- KYKM — Yakima Air Trml/Mcallister Field
Yakima · elev 1,099 ft
- 21W — Ranger Creek
Greenwater · elev 2,650 ft
- KELN — Bowers Field
Ellensburg · elev 1,763 ft
- 2W1 — De Vere Field
Cle Elum · elev 1,800 ft
- S93 — Cle Elum Municipal
Cle Elum · elev 1,945 ft
- KESW — Easton State
Easton · elev 2,226 ft
- 39P — Strom Field
Morton · elev 941 ft
Frequently asked questions
How high does density altitude get at 4S6 in summer?
On a typical August afternoon — around 76 °F at the nearest NOAA normals station — density altitude at Tieton State reaches roughly 4,715 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 4S6 on an average day?
It swings with the seasons: from roughly 1,796 ft at the coldest month's average temperature to about 3,792 ft at the warmest month's — all from a constant field elevation of 2,964 ft. The month-by-month table above carries the full year.
What is the field elevation of Tieton State?
2,964 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4S6 (FAA), in Rimrock, Washington.