Grand Canyon, Arizona · field elev 5,999 ft
Density Altitude at Valle (40G)
Valle is a genuine high-and-hot field: from 5,999 ft of elevation, a typical July afternoon (88 °F) pushes density altitude to about 9,120 ft — the airplane performs like it is 3,121 ft above the field before the wheels roll.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 33.9 | 5,773 ft | 45.0 | 6,501 ft ▲ |
| February | 36.7 | 5,958 ft | 48.6 | 6,732 ft ▲ |
| March | 43.2 | 6,384 ft | 57.6 | 7,303 ft ▲ |
| April | 48.9 | 6,752 ft | 64.1 | 7,708 ft ▲ |
| May | 57.0 | 7,265 ft | 73.0 | 8,252 ft ⚠ |
| June | 67.2 | 7,898 ft | 84.8 | 8,956 ft ⚠ |
| July | 72.4 | 8,215 ft | 87.6 | 9,120 ft ⚠ |
| August | 70.4 | 8,094 ft | 85.0 | 8,968 ft ⚠ |
| September | 63.9 | 7,695 ft | 78.9 | 8,606 ft ⚠ |
| October | 53.3 | 7,032 ft | 67.9 | 7,941 ft ▲ |
| November | 42.4 | 6,332 ft | 55.8 | 7,190 ft ▲ |
| December | 33.0 | 5,713 ft | 44.1 | 6,442 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 40G
DENSITY ALTITUDE high DA
Field elevation 5,999 ft — the air behaves like 9,144 ft.
- PRESSURE ALT
- 6,001 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 Arizona fields
- KGCN — Grand Canyon Ntl Park
Grand Canyon · elev 6,609 ft
- KCMR — H A Clark Meml Field
Williams · elev 6,691 ft
- KFLG — Flagstaff Pulliam
Flagstaff · elev 7,015 ft
- P23 — Seligman
Seligman · elev 5,237 ft
- T03 — Tuba City
Tuba City · elev 4,513 ft
- KSEZ — Sedona
Sedona · elev 4,831 ft
- L37 — Grand Canyon Caverns
Peach Springs · elev 5,397 ft
- P52 — Cottonwood
Cottonwood · elev 3,560 ft
Frequently asked questions
How high does density altitude get at 40G in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Valle reaches roughly 9,120 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 40G on an average day?
It swings with the seasons: from roughly 5,713 ft at the coldest month's average temperature to about 8,215 ft at the warmest month's — all from a constant field elevation of 5,999 ft. The month-by-month table above carries the full year.
What is the field elevation of Valle?
5,999 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 40G (FAA), in Grand Canyon, Arizona.