Lewiston, Idaho · field elev 1,442 ft
Density Altitude at Lewiston/Nez Perce County (KLWS)
Lewiston/Nez Perce County sits at 1,442 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 3,791 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 | 36.2 | 272 ft | 42.1 | 675 ft |
| February | 39.3 | 485 ft | 47.0 | 1,005 ft |
| March | 45.4 | 898 ft | 55.1 | 1,542 ft |
| April | 51.5 | 1,305 ft | 62.3 | 2,011 ft |
| May | 60.0 | 1,862 ft | 72.0 | 2,630 ft |
| June | 66.5 | 2,281 ft | 79.0 | 3,068 ft |
| July | 75.8 | 2,868 ft | 90.8 | 3,791 ft |
| August | 75.2 | 2,831 ft | 90.1 | 3,748 ft |
| September | 65.9 | 2,242 ft | 79.5 | 3,099 ft |
| October | 52.5 | 1,371 ft | 63.0 | 2,056 ft |
| November | 41.6 | 641 ft | 48.7 | 1,119 ft |
| December | 35.2 | 203 ft | 40.8 | 587 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 KLWS
DENSITY ALTITUDE
Field elevation 1,442 ft — the air behaves like 3,803 ft.
- PRESSURE ALT
- 1,443 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 Idaho fields
- S89 — Craigmont Municipal
Craigmont · elev 3,805 ft
- I45 — Wapshilla
Winchester · elev 1,415 ft
- S68 — Orofino Municipal
Orofino · elev 1,005 ft
- 0S5 — Nezperce Municipal
Nezperce · elev 3,204 ft
- S84 — Cottonwood Municipal
Cottonwood · elev 3,474 ft
- S73 — Kamiah Municipal
Kamiah · elev 1,206 ft
- KGIC — Idaho County
Grangeville · elev 3,313 ft
- S82 — Kooskia Municipal
Kooskia · elev 1,263 ft
Frequently asked questions
How high does density altitude get at KLWS in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Lewiston/Nez Perce County reaches roughly 3,791 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 KLWS on an average day?
It swings with the seasons: from roughly 203 ft at the coldest month's average temperature to about 2,868 ft at the warmest month's — all from a constant field elevation of 1,442 ft. The month-by-month table above carries the full year.
What is the field elevation of Lewiston/Nez Perce County?
1,442 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLWS (ICAO) / LWS (FAA), in Lewiston, Idaho.