Cottonwood, Idaho · field elev 3,474 ft
Density Altitude at Cottonwood Municipal (S84)
From a field elevation of 3,474 ft, a typical August afternoon at Cottonwood Municipal (81 °F) raises density altitude to about 5,691 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 | 30.9 | 2,438 ft | 37.1 | 2,859 ft |
| February | 33.3 | 2,602 ft | 40.2 | 3,067 ft |
| March | 39.0 | 2,987 ft | 47.6 | 3,558 ft |
| April | 44.5 | 3,353 ft | 53.9 | 3,969 ft |
| May | 52.6 | 3,884 ft | 63.0 | 4,551 ft |
| June | 58.7 | 4,277 ft | 69.4 | 4,953 ft |
| July | 68.3 | 4,884 ft | 80.6 | 5,643 ft ▲ |
| August | 68.6 | 4,903 ft | 81.4 | 5,691 ft ▲ |
| September | 60.4 | 4,386 ft | 72.2 | 5,127 ft ▲ |
| October | 48.0 | 3,584 ft | 57.4 | 4,194 ft |
| November | 36.8 | 2,839 ft | 43.6 | 3,294 ft |
| December | 29.7 | 2,356 ft | 35.8 | 2,771 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 S84
DENSITY ALTITUDE caution
Field elevation 3,474 ft — the air behaves like 5,667 ft.
- PRESSURE ALT
- 3,476 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- 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 Idaho fields
- KGIC — Idaho County
Grangeville · elev 3,313 ft
- 0S5 — Nezperce Municipal
Nezperce · elev 3,204 ft
- S89 — Craigmont Municipal
Craigmont · elev 3,805 ft
- S82 — Kooskia Municipal
Kooskia · elev 1,263 ft
- S73 — Kamiah Municipal
Kamiah · elev 1,206 ft
- I45 — Wapshilla
Winchester · elev 1,415 ft
- 1S7 — Slate Creek
Slate Creek · elev 1,660 ft
- S68 — Orofino Municipal
Orofino · elev 1,005 ft
Frequently asked questions
How high does density altitude get at S84 in summer?
On a typical August afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Cottonwood Municipal reaches roughly 5,691 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 S84 on an average day?
It swings with the seasons: from roughly 2,356 ft at the coldest month's average temperature to about 4,903 ft at the warmest month's — all from a constant field elevation of 3,474 ft. The month-by-month table above carries the full year.
What is the field elevation of Cottonwood Municipal?
3,474 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S84 (FAA), in Cottonwood, Idaho.