Moses Lake, Washington · field elev 1,189 ft
Density Altitude at Grant County International (KMWH)
Grant County International sits at 1,189 ft, and even a typical July afternoon (90 °F) only lifts density altitude to about 3,416 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 | 30.1 | −466 ft | 36.4 | −29 ft |
| February | 35.3 | −105 ft | 44.1 | 496 ft |
| March | 43.3 | 442 ft | 54.9 | 1,217 ft |
| April | 50.5 | 925 ft | 63.7 | 1,790 ft |
| May | 59.5 | 1,518 ft | 73.7 | 2,427 ft |
| June | 66.2 | 1,951 ft | 80.4 | 2,846 ft |
| July | 73.4 | 2,408 ft | 89.7 | 3,416 ft |
| August | 72.2 | 2,332 ft | 88.3 | 3,331 ft |
| September | 62.8 | 1,732 ft | 78.7 | 2,740 ft |
| October | 49.9 | 885 ft | 62.8 | 1,732 ft |
| November | 37.6 | 53 ft | 46.3 | 645 ft |
| December | 29.9 | −480 ft | 36.2 | −43 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 KMWH
DENSITY ALTITUDE
Field elevation 1,189 ft — the air behaves like 3,435 ft.
- PRESSURE ALT
- 1,190 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
- W20 — Moses Lake Municipal
Moses Lake · elev 1,203 ft
- KEPH — Ephrata Municipal
Ephrata · elev 1,276 ft
- 5W1 — Wilson Creek
Wilson Creek · elev 1,430 ft
- 2S4 — Warden
Warden · elev 1,276 ft
- 80T — Quincy Municipal
Quincy · elev 1,271 ft
- S70 — Othello Municipal
Othello · elev 1,149 ft
- 43D — Odessa Municipal
Odessa · elev 1,738 ft
- 0S0 — Lind
Lind · elev 1,507 ft
Frequently asked questions
How high does density altitude get at KMWH in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Grant County International reaches roughly 3,416 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 KMWH on an average day?
It swings with the seasons: from roughly −480 ft at the coldest month's average temperature to about 2,408 ft at the warmest month's — all from a constant field elevation of 1,189 ft. The month-by-month table above carries the full year.
What is the field elevation of Grant County International?
1,189 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KMWH (ICAO) / MWH (FAA), in Moses Lake, Washington.